Cisco IOS XR Software Image Verification Bypass Vulnerability
Summary
| CVE | CVE-2025-20248 |
|---|---|
| State | PUBLISHED |
| Assigner | cisco |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2025-09-10 16:15:36 UTC |
| Updated | 2026-09-26 00:10:00 UTC |
| Description | A vulnerability in the installation process of Cisco IOS XR Software could allow an authenticated, local attacker to bypass Cisco IOS XR Software image signature verification and load unsigned software on an affected device. To exploit this vulnerability, the attacker must have root-system privileges on the affected device. This vulnerability is due to incomplete validation of files during the installation of an .iso file. An attacker could exploit this vulnerability by modifying contents of the .iso image and then installing and activating it on the device. A successful exploit could allow the attacker to load an unsigned file as part of the image activation process. |
Risk And Classification
Primary CVSS: v3.1 6 MEDIUM from [email protected]
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
EPSS: 0.000970000 probability, percentile 0.007030000 (date 2026-09-27)
Problem Types: CWE-347 | CWE-347 Improper Verification of Cryptographic Signature
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Secondary | 6 | MEDIUM | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N |
| 3.1 | CNA | CVSSV3_1 | 6 | MEDIUM | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N |
CVSS v3.1 Breakdown
Attack Vector
LocalAttack Complexity
LowPrivileges Required
HighUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
HighAvailability
NoneCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Operating System | Cisco | Ios Xr | 24.1.1 | All | All | All |
| Operating System | Cisco | Ios Xr | 24.1.2 | All | All | All |
| Operating System | Cisco | Ios Xr | 24.2.1 | All | All | All |
| Operating System | Cisco | Ios Xr | 24.2.11 | All | All | All |
| Operating System | Cisco | Ios Xr | 24.2.2 | All | All | All |
| Operating System | Cisco | Ios Xr | 24.2.20 | All | All | All |
| Operating System | Cisco | Ios Xr | 24.3.1 | All | All | All |
| Operating System | Cisco | Ios Xr | 24.3.2 | All | All | All |
| Operating System | Cisco | Ios Xr | 24.4.1 | All | All | All |
| Operating System | Cisco | Ios Xr | 24.4.10 | All | All | All |
| Operating System | Cisco | Ios Xr | 24.4.15 | All | All | All |
| Operating System | Cisco | Ios Xr | 6.5.1 | All | All | All |
| Operating System | Cisco | Ios Xr | 6.5.15 | All | All | All |
| Operating System | Cisco | Ios Xr | 6.5.2 | All | All | All |
| Operating System | Cisco | Ios Xr | 6.5.25 | All | All | All |
| Operating System | Cisco | Ios Xr | 6.5.26 | All | All | All |
| Operating System | Cisco | Ios Xr | 6.5.28 | All | All | All |
| Operating System | Cisco | Ios Xr | 6.5.29 | All | All | All |
| Operating System | Cisco | Ios Xr | 6.5.3 | All | All | All |
| Operating System | Cisco | Ios Xr | 6.5.31 | All | All | All |
| Operating System | Cisco | Ios Xr | 6.5.32 | All | All | All |
| Operating System | Cisco | Ios Xr | 6.5.33 | All | All | All |
| Operating System | Cisco | Ios Xr | 6.5.35 | All | All | All |
| Operating System | Cisco | Ios Xr | 6.5.351 | All | All | All |
| Operating System | Cisco | Ios Xr | 6.5.352 | All | All | All |
| Operating System | Cisco | Ios Xr | 6.5.90 | All | All | All |
| Operating System | Cisco | Ios Xr | 6.5.92 | All | All | All |
| Operating System | Cisco | Ios Xr | 6.5.93 | All | All | All |
| Operating System | Cisco | Ios Xr | 6.6.1 | All | All | All |
| Operating System | Cisco | Ios Xr | 6.6.11 | All | All | All |
| Operating System | Cisco | Ios Xr | 6.6.12 | All | All | All |
| Operating System | Cisco | Ios Xr | 6.6.2 | All | All | All |
| Operating System | Cisco | Ios Xr | 6.6.25 | All | All | All |
| Operating System | Cisco | Ios Xr | 6.6.3 | All | All | All |
| Operating System | Cisco | Ios Xr | 6.6.4 | All | All | All |
| Operating System | Cisco | Ios Xr | 6.7.1 | All | All | All |
| Operating System | Cisco | Ios Xr | 6.7.2 | All | All | All |
| Operating System | Cisco | Ios Xr | 6.7.3 | All | All | All |
| Operating System | Cisco | Ios Xr | 6.7.35 | All | All | All |
| Operating System | Cisco | Ios Xr | 6.8.1 | All | All | All |
| Operating System | Cisco | Ios Xr | 6.8.2 | All | All | All |
| Operating System | Cisco | Ios Xr | 6.9.1 | All | All | All |
| Operating System | Cisco | Ios Xr | 6.9.2 | All | All | All |
| Operating System | Cisco | Ios Xr | 7.0.0 | All | All | All |
| Operating System | Cisco | Ios Xr | 7.0.1 | All | All | All |
| Operating System | Cisco | Ios Xr | 7.0.2 | All | All | All |
| Operating System | Cisco | Ios Xr | 7.0.90 | All | All | All |
| Operating System | Cisco | Ios Xr | 7.1.1 | All | All | All |
| Operating System | Cisco | Ios Xr | 7.1.15 | All | All | All |
| Operating System | Cisco | Ios Xr | 7.1.2 | All | All | All |
| Operating System | Cisco | Ios Xr | 7.1.25 | All | All | All |
| Operating System | Cisco | Ios Xr | 7.1.3 | All | All | All |
| Operating System | Cisco | Ios Xr | 7.10.1 | All | All | All |
| Operating System | Cisco | Ios Xr | 7.10.2 | All | All | All |
| Operating System | Cisco | Ios Xr | 7.11.1 | All | All | All |
| Operating System | Cisco | Ios Xr | 7.11.2 | All | All | All |
| Operating System | Cisco | Ios Xr | 7.11.21 | All | All | All |
| Operating System | Cisco | Ios Xr | 7.2.0 | All | All | All |
| Operating System | Cisco | Ios Xr | 7.2.1 | All | All | All |
| Operating System | Cisco | Ios Xr | 7.2.2 | All | All | All |
| Operating System | Cisco | Ios Xr | 7.3.1 | All | All | All |
| Operating System | Cisco | Ios Xr | 7.3.2 | All | All | All |
| Operating System | Cisco | Ios Xr | 7.3.27 | All | All | All |
| Operating System | Cisco | Ios Xr | 7.3.3 | All | All | All |
| Operating System | Cisco | Ios Xr | 7.3.4 | All | All | All |
| Operating System | Cisco | Ios Xr | 7.3.5 | All | All | All |
| Operating System | Cisco | Ios Xr | 7.3.6 | All | All | All |
| Operating System | Cisco | Ios Xr | 7.4.1 | All | All | All |
| Operating System | Cisco | Ios Xr | 7.4.15 | All | All | All |
| Operating System | Cisco | Ios Xr | 7.4.16 | All | All | All |
| Operating System | Cisco | Ios Xr | 7.4.2 | All | All | All |
| Operating System | Cisco | Ios Xr | 7.5.1 | All | All | All |
| Operating System | Cisco | Ios Xr | 7.5.2 | All | All | All |
| Operating System | Cisco | Ios Xr | 7.5.3 | All | All | All |
| Operating System | Cisco | Ios Xr | 7.5.4 | All | All | All |
| Operating System | Cisco | Ios Xr | 7.5.5 | All | All | All |
| Operating System | Cisco | Ios Xr | 7.6.1 | All | All | All |
| Operating System | Cisco | Ios Xr | 7.6.15 | All | All | All |
| Operating System | Cisco | Ios Xr | 7.6.2 | All | All | All |
| Operating System | Cisco | Ios Xr | 7.6.3 | All | All | All |
| Operating System | Cisco | Ios Xr | 7.7.1 | All | All | All |
| Operating System | Cisco | Ios Xr | 7.7.2 | All | All | All |
| Operating System | Cisco | Ios Xr | 7.7.21 | All | All | All |
| Operating System | Cisco | Ios Xr | 7.8.1 | All | All | All |
| Operating System | Cisco | Ios Xr | 7.8.2 | All | All | All |
| Operating System | Cisco | Ios Xr | 7.8.22 | All | All | All |
| Operating System | Cisco | Ios Xr | 7.8.23 | All | All | All |
| Operating System | Cisco | Ios Xr | 7.9.1 | All | All | All |
| Operating System | Cisco | Ios Xr | 7.9.2 | All | All | All |
| Operating System | Cisco | Ios Xr | 7.9.21 | All | All | All |
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Cisco | Cisco IOS XR Software | affected 6.5.3 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 6.5.29 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 6.5.1 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 6.6.1 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 6.5.2 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 6.5.92 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 6.5.15 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 6.6.2 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 7.0.1 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 6.6.25 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 6.5.26 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 6.6.11 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 6.5.25 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 6.5.28 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 6.5.93 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 6.6.12 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 6.5.90 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 7.0.0 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 7.1.1 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 7.0.90 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 6.6.3 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 6.7.1 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 7.0.2 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 7.1.15 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 7.2.0 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 7.2.1 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 7.1.2 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 6.7.2 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 7.1.25 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 6.6.4 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 7.3.1 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 7.1.3 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 6.7.3 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 7.4.1 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 7.2.2 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 6.5.31 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 6.8.1 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 7.4.15 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 6.5.32 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 7.3.2 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 7.5.1 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 7.4.16 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 7.3.27 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 7.6.1 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 7.5.2 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 7.6.15 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 7.3.3 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 7.7.1 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 6.8.2 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 7.3.4 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 7.4.2 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 6.7.35 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 6.9.1 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 7.6.2 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 7.8.1 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 7.5.3 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 7.7.2 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 6.9.2 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 7.9.1 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 7.8.2 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 7.5.4 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 6.5.33 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 7.8.22 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 7.10.1 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 7.7.21 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 7.9.2 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 7.3.5 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 7.5.5 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 7.11.1 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 7.9.21 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 7.10.2 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 7.6.3 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 24.1.1 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 7.3.6 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 7.11.2 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 24.2.1 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 24.1.2 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 24.2.11 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 24.3.1 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 24.4.1 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 24.2.2 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 7.8.23 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 7.11.21 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 24.2.20 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 24.3.2 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 24.4.10 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 6.5.35 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 24.4.15 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 6.5.351 | Not specified |
| CNA | Cisco | Cisco IOS XR Software | affected 6.5.352 | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-xrsig-... | [email protected] | sec.cloudapps.cisco.com | Vendor Advisory |
| 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 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.