High severity · published Feb 25, 2026
CVE-2026-20128
Cisco Catalyst SD-WAN Manager Information Disclosure Vulnerability
In wildKEV
7.5
CVSS
7.3%
EPSS
Yes
On KEV
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.
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
Attack vector
Local
Complexity
High
Privileges
High
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)7.3% · higher than 94% of CVEs
Exploited in the wildYes
CISA KEVListed Apr 20, 2026
Federal remediation dueApr 23, 2026
Ransomware campaign useNot known
Affected products
Which versions
CC
Cisco Catalyst SD-WAN Manager · Cisco
20.1.12; 19.2.1; 18.4.4; 18.4.5; 20.1.1.1; 20.1.1; +34 more · source: vendor
CS
Catalyst Sd-wan Manager · Cisco
before 20.9.8.2; 20.10 before 20.12.5.3; 20.13 before 20.15.4.2; 20.16 before 20.18; 20.12.6 · source: NVD, KEV
In the news
AdvisoryHigh
CISA Adds Eight Known Exploited Vulnerabilities to Catalog
CISA has added eight new vulnerabilities to its Known Exploited Vulnerabilities (KEV) Catalog , based on evidence of active exploitation.
CVE-2023-27351 PaperCut NG/MF Improper Authentication Vulnerability
CVE-2024-27199 JetBrains TeamCity Relative Path Traversal Vulnerability
CVE-2025-2749 Kentico Xperience Path Traversal Vulnerability
CVE-2025-32975 Quest KACE Systems Management Appliance (SMA) Improper Authentication Vulnerability
CVE-2025-48700 Synacor Zimbra Collaboration Suite (ZCS) Cross-site Scripting Vulnerability
CVE-2026-20122 Cisco Catalyst SD-WAN Manager Incorrect Use of Privileged APIs Vulnerability
CVE-2026-20128 Cisco Catalyst SD-WAN Manager Storing Passwords in a Recoverable Format Vulnerability
CVE-2026-20133 Cisco Catalyst SD-WAN Manager Exposure of Sensitive Information to an Unauthorized Actor Vulnerability
These types of vulnerabilities are frequent attack vectors for malicious cyber actors and pose significant risks to the federal enterprise.
Binding Operational Directive (BOD) 22-01: Reducing the Significant Risk of Known Exploited Vulnerabilities established the KEV Catalog as a living list of known Common Vulnerabilities and Exposures (CVEs) that carry significant risk to the federal enterprise. BOD 22-01 requires Federal Civilian Executive Branch (FCEB) agencies to remediate identified vulnerabilities by the due date to protect FCEB networks against active threats. Se...
Apr 20, 2026·CISA Advisories
VulnerabilityHigh
[CISA KEV] CVE-2026-20128: Cisco Catalyst SD-WAN Manager - Cisco Catalyst SD-WAN Manager Storing Passwords in a Recoverable Format Vulnerability
Cisco Catalyst SD-WAN Manager contains a storing passwords in a recoverable format vulnerability that allows an authenticated, local attacker to gain DCA user privileges by accessing a credential file for the DCA user on the filesystem as a low-privileged user.
CSCatalyst SD-WAN ManagerCVE-2026-20128
Apr 20, 2026·CISA KEV
VulnerabilityCritical
Cisco flags ongoing exploitation of two recently patched Catalyst SD-WAN flaws
Cisco warns that two recently patched Catalyst SD-WAN flaws, CVE-2026-20128 and CVE-2026-20122, are already being actively exploited in the wild. Cisco warned customers that threat actors are actively exploiting two recently patched Catalyst SD-WAN vulnerabilities, CVE-2026-20128 and CVE-2026-20122. The networking giant urged organizations to apply the latest security updates to reduce the risk of compromise. […]
Mar 6, 2026·Security Affairs
VulnerabilityHigh
Cisco warns of SD-WAN Manager exploitation, fixes 48 firewall vulnerabilities
Cisco has confirmed that two Catalyst SD-WAN Manager vulnerabilities (CVE-2026-20128 and CVE-2026-20122) patched in late February 2025 are being exploited by attackers. The exploited vulnerabilities (CVE-2026-20128, CVE-2026-20122) CVE-2026-20128 is a bug in the Data Collection Agent (DCA) feature of Cisco Catalyst SD-WAN Manager, which could allow an authenticated, local attacker to gain DCA user privileges on an affected system. “To exploit this vulnerability, the attacker must have valid vmanage credentials on the affected system,” Cisco … More →
The post Cisco warns of SD-WAN Manager exploitation, fixes 48 firewall vulnerabilities appeared first on Help Net Security .
Mar 5, 2026·Help Net Security
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-20128
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-20128
CISA KEV catalogue
https://www.cisa.gov/known-exploited-vulnerabilities-catalog
sec.cloudapps.cisco.com
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-authbp-qwCX8D4v
More from Cisco Catalyst SD-WAN Manager
10.0
CVE-2026-20182
Cisco Catalyst SD-WAN Controller Authentication Bypass Vulnerability
10.0
CVE-2026-20127
Cisco Catalyst SD-WAN Controller Authentication Bypass Vulnerability
9.8
CVE-2026-76504
Cisco Catalyst SD-WAN Manager System Account Authorization Bypass Vulnerability
7.8
CVE-2026-20245
Cisco Catalyst SD-WAN Controller Authenticated Privilege Escalation Vulnerability
7.8
CVE-2022-20775
Cisco SD-WAN Software Privilege Escalation Vulnerability
