CVE Tools
Sign in

CVE-2026-20128

Cisco Catalyst SD-WAN Manager Information Disclosure Vulnerability

Published: Feb 25, 2026Updated: Apr 21, 2026 Sources: CVE List NVD BDUCWE-257
7.5HIGH
NVD MITRE
EPSS Score
5.3%
Top 8.5%
CISA KEV
Active Exploitation
Since Apr 20, 2026
Exploits
0 Known
Remediation
Patch Available
Self-Check
OpenVAS

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:LAC:HPR:HUI:NS:CC:HI:HA:H
Exploitability
AV:LAttack Vector
Local
AC:HAttack Complexity
High
PR:HPrivileges Required
High
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-257

Affected Products

Cisco Systems Inc.
commercial·USaka cisco, cisco systems
Catalyst SD-WAN Manager
Networking Infrastructure
Cisco Catalyst SD-WAN Manager
Networking Infrastructure
and 1 more affected products View all →

Exploitability

CISA Known Exploited Vulnerability
Added to KEV:Apr 20, 2026
Remediation due:Apr 23, 2026

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.

0 exploit sources identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available
Is your org exposed to CVE-2026-20128?We can run the check for you — a free external exposure review, no install. Check my exposure

References

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-authbp-qwCX8D4v
sec.cloudapps.cisco.com
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20128
cisa.gov
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-authbp-qwCX8D4v
sec.cloudapps.cisco.com
and 2 more references View all →
News mentions
7

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2026-20128 and every CVE in our database. Create a free account — no credit card required.

Create Free Account
Plain-language analysis
Impact assessment and exploitation scenario in plain English
Attack graph visualization
Interactive attack path and kill chain mapping
Exploit details & PoC links
ExploitDB, Metasploit, GitHub PoCs with direct links
Nuclei scanner templates
Ready-to-use vulnerability scanner templates
Full remediation guide
Patch instructions, workarounds, and compliance impact
Interactive AI chat
Ask questions about this vulnerability in natural language
Related vulnerabilities
Semantically similar CVEs and attack patterns
REST API & MCP access
Integrate vulnerability data into your workflows