Cisco Catalyst SD-WAN Manager Information Disclosure Vulnerability
Summary
| CVE | CVE-2026-20128 |
|---|---|
| State | PUBLISHED |
| Assigner | cisco |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-02-25 17:25:30 UTC |
| Updated | 2026-04-21 12:48:20 UTC |
| Description | A vulnerability in the Data Collection Agent (DCA) feature of Cisco Catalyst SD-WAN Manager could allow an unauthenticated, remote attacker to gain DCA user privileges on an affected system. This vulnerability is due to the presence of a credential file for the DCA user on an affected system. An attacker could exploit this vulnerability by sending a crafted HTTP request and reading the file that contains the DCA password from that affected system. A successful exploit could allow the attacker to access another affected system and gain DCA user privileges. Note: Cisco Catalyst SD-WAN Manager releases 20.18 and later are not affected by this vulnerability. |
Risk And Classification
Primary CVSS: v3.1 7.5 HIGH from [email protected]
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
EPSS: 0.000120000 probability, percentile 0.016610000 (date 2026-04-20)
CISA KEV: Listed on 2026-04-20; due 2026-04-23; ransomware use Unknown
Problem Types: CWE-257 | CWE-257 Storing Passwords in a Recoverable Format
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Secondary | 7.5 | HIGH | CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H |
| 3.1 | CNA | CVSSV3_1 | 7.5 | HIGH | CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H |
CVSS v3.1 Breakdown
Attack Vector
LocalAttack Complexity
HighPrivileges Required
HighUser Interaction
NoneScope
ChangedConfidentiality
HighIntegrity
HighAvailability
HighCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
CISA Known Exploited Vulnerability
| Vendor | Cisco |
|---|---|
| Product | Catalyst SD-WAN Manager |
| Name | Cisco Catalyst SD-WAN Manager Storing Passwords in a Recoverable Format Vulnerability |
| Required Action | Please adhere to CISA’s guidelines to assess exposure and mitigate risks associated with Cisco SD-WAN devices as outlines in CISA’s Emergency Directive 26-03 (URL listed below in Notes) and CISA’s “Hunt & Hardening Guidance for Cisco SD-WAN Devices (URL listed below in Notes). Adhere to the applicable BOD 22-01 guidance for cloud services or discontinue use of the product if mitigations are not available. |
| Notes | CISA Mitigation Instructions: https://www.cisa.gov/news-events/directives/ed-26-03-mitigate-vulnerabilities-cisco-sd-wan-systems ; https://www.cisa.gov/news-events/directives/supplemental-direction-ed-26-03-hunt-and-hardening-guidance-cisco-sd-wan-systems ; https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-authbp-qwCX8D4v ; https://nvd.nist.gov/vuln/detail/CVE-2026-20128 |
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Application | Cisco | Catalyst Sd-wan Manager | All | All | All | All |
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.1.12 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 19.2.1 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 18.4.4 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 18.4.5 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.1.1.1 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.1.1 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 19.3.0 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 19.2.2 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 19.2.099 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 18.3.6 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 18.3.7 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 19.2.0 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 18.3.8 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 19.0.0 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 19.1.0 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 18.4.302 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 18.4.303 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 19.2.097 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 19.2.098 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 17.2.10 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 18.3.6.1 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 19.0.1a | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 18.2.0 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 18.4.3 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 18.4.1 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 17.2.8 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 18.3.3.1 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 18.4.0 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 18.3.1 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 17.2.6 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 17.2.9 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 18.3.4 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 17.2.5 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 18.3.1.1 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 18.3.5 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 18.4.0.1 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 18.3.3 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 17.2.7 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 18.3.0 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 19.2.3 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 18.4.501_ES | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.3.1 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.1.2 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 19.2.929 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 19.2.31 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.3.2 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 19.2.32 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.3.2.1 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.3.2.1_927 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 18.4.6 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.3.2_928 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.3.2_929 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.4.1.0.1 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.3.2.1_930 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 19.2.4 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.5.0.1.1 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.4.1.1 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.3.3 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 19.2.4.0.1 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.3.2_937 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.5.1 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.1.3 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.3.3.0.4 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.3.3.1.2 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.3.3.1.1 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.4.1.2 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.3.3.0.2 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.4.1.1.5 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.4.1.0.02 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.3.3.1.7 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.3.3.1.5 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.5.1.0.1 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.3.3.1.10 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.3.3.0.8 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.4.2 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.3.4 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.3.3.0.14 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 19.2.4.0.8 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 19.2.4.0.9 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.3.4.0.1 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.3.2.0.5 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.5.1.0.2 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.6.1.1 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.6.0.18.3 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.3.2.0.6 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.6.0.18.4 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.4.2.0.2 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.3.3.0.16 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.6.1.0.1 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.3.4.0.6 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.7.1EFT2 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.3.4.0.9 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.3.4.0.11 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.3.3.0.18 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.6.2.1 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.3.4.1 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.4.2.1 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.4.2.1.1 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.3.4.1.1 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.3.813 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.3.4.0.19 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.4.2.2.1 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.5.1.2 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.3.814 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.4.2.2 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.6.2.2 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.3.4.2.1 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.3.4.1.2 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.3.4.0.20 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.6.2.2.3 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.4.2.2.2 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.6.2.0.4 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.3.4.0.24 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.6.2.2.7 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.3.4.2.2 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.4.2.2.4 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.3.5.0.8 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.3.5.0.9 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.3.5.0.7 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.6.3.0.2 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.9.1EFT2 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.3.6 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.3.7 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.4.2.3 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.3.5.1 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.3.4.3 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.3.3.2 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.3.7.1 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.3.4.0.25 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.6.2.2.4 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.6.1.2 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.1.3.1 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.6.5.1.4 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.3.8 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 20.12.501 | Not specified |
| CNA | Cisco | Cisco Catalyst SD-WAN Manager | affected 26.1.1 | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| www.cisa.gov/known-exploited-vulnerabilities-catalog | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | www.cisa.gov | US Government Resource |
| sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-... | [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 |
| CISA Known Exploited Vulnerabilities catalog | CISA | www.cisa.gov | kev |
No vendor comments have been submitted for this CVE.
Additional Advisory Data
| Source | Time | Event |
|---|---|---|
| ADP | 2026-04-20T00:00:00.000Z | CVE-2026-20128 added to CISA KEV |
Exploits
CNA: The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerabilities that are described in CVE-2026-20133, CVE-2026-20126, and CVE-2026-20129. In March 2026, the Cisco PSIRT became aware of active exploitation of the vulnerabilities that are described in CVE-2026-20128 and CVE-2026-20122 only. The vulnerabilities that are described in the other CVEs in this advisory are not known to have been compromised. Cisco strongly recommends that customers upgrade to a fixed software release to remediate these vulnerabilities.
There are currently no legacy QID mappings associated with this CVE.