Cisco IOS XE Software Web-Based Management Interface Vulnerability
Summary
| CVE | CVE-2026-20308 |
|---|---|
| State | PUBLISHED |
| Assigner | cisco |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-08-05 17:16:51 UTC |
| Updated | 2026-08-06 15:44:56 UTC |
| Description | A vulnerability in the web-based management interface of Cisco IOS XE Software could allow an authenticated, remote attacker with low privileges to perform a denial of service (DoS) attack against an affected device. This vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by sending crafted input to the web-based management interface of an affected device. A successful exploit could allow the attacker to cause the web-based management interface to become unresponsive. |
Risk And Classification
Primary CVSS: v3.1 4.3 MEDIUM from [email protected]
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
EPSS: 0.003190000 probability, percentile 0.243470000 (date 2026-08-09)
Problem Types: CWE-269 | CWE-269 Improper Privilege Management
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Secondary | 4.3 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L |
| 3.1 | CNA | CVSSV3_1 | 4.3 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
NoneIntegrity
NoneAvailability
LowCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Cisco | Cisco IOS XE Software | affected 17.2.1a | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.12.1y | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.12.3s | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.12.1w | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.9.1d | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.3.1 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.9.4c | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.2.1 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.9.1b | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.9.2s | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.12.4 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.12.3a | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.1.1s | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.11.1a | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.11.1b | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.9.1s | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.9.3h | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.9.1c | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.10.1f | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.2.1v | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.9.3a | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.12.1a | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.12.1x | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.10.1c | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.12.3 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.11.2 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.12.2s | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.10.1b | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.9.6 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.9.2 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.10.1 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.12.1t | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.9.1 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.9.3s | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.12.2 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.11.1 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.9.3 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.11.1s | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.12.1 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.1.1 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.1.2 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.10.1d | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.1.1t | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.9.4 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.12.2t | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.9.5 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.10.1e | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.10.1a | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.12.1z | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.9.1a | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.9.5f | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.10.1g | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.9.2a | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.10.3 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.11.1c | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.10.1s | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.2.1r | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.1.1a | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.10.2 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.12.2a | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.12.1c | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.12.1s | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.2.2 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.9.8 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.9.7 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.1.3 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.3.1a | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.3.2a | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.12.5 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.3.1w | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.3.2 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.4.1 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.12.4a | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.4.1a | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.3.1x | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.3.3 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.2.3 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.5.1 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.12.1z1 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.12.5a | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.4.1b | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.3.1z | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.12.5b | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.4.2 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.3.3a | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.3.5 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.3.4 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.5.1a | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.12.6 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.6.1 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.12.1z2 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.3.4a | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.6.1a | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.7.1 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.6.1x | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.6.2 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.12.6a | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.3.4c | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.4.2a | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.3.4b | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.7.1a | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.12.7 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.8.1a | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.6.3a | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.6.3 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.7.2 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.7.1b | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.9.1w | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.3.5a | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.6.1z | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.12.8 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.8.1 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.9.1 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.6.4 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.3.5b | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.9.1a | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.3.6 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.10.1 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.9.8a | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.6.1z1 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.10.1a | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.9.2 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.6.5 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.9.1x | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.9.1y | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.9.8b | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.3.7 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.9.2a | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.9.3 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.12.9 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.11.1 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.10.1b | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.6.6 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.9.1x1 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.11.1a | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.9.3a | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.12.1 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.3.8 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.9.4 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.12.10 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.12.1w | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.9.1y1 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.12.1a | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.9.5 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.13.1 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.12.1x | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.12.2 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.14.1 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.9.4a | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.3.8a | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.6.6a | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.6.5a | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.6.7 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.12.10a | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.15.1 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.13.1a | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.12.2a | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.12.11 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.12.3 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.12.1y | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.12.1z | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.9.5a | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.14.1a | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.9.5b | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.6.8 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.12.12 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.12.4 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.9.6 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.17.1 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.16.1 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.15.1w | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.12.3a | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.9.5c | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.15.1a | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.12.1z1 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.15.2 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.15.1b | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.9.5d | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.15.1x | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.9.6a | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.12.1z2 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.6.8a | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.16.1a | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.12.13 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.15.3 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.9.7 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.12.5 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.15.1y | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.9.5e | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.12.4a | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.15.2a | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.15.2c | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.15.2b | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.12.1z3 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.9.5f | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.12.4b | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.12.5a | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.18.1 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.12.6 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.12.1z4 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.9.8 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.9.7a | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.15.3a | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.15.4 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.12.5b | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.15.3b | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.12.14 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.18.1z | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.9.7b | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.12.5c | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 26.1.1 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.18.1a | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.15.4a | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.18.2 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.18.1w | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.15.4b | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.12.6a | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.12.7 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.15.4c | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.9.9 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.12.5d | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.12.15 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.15.4s1 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.15.5 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.12.1z5 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.18.1x | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.12.1z6 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.15.4d | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.12.6b | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.4.1c | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.15.5a | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.18.1y | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.12.7a | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.18.3 | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.12.7b | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 17.18.3a | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 26.1.1a | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 26.2.1ea | Not specified |
| CNA | Cisco | Cisco IOS XE Software | affected 16.12.16 | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-webui-... | [email protected] | sec.cloudapps.cisco.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
Additional Advisory Data
Exploits
CNA: The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.
There are currently no legacy QID mappings associated with this CVE.