CVE-2026-20128
Cisco Catalyst SD-WAN Manager Information Disclosure Vulnerability
Cisco Catalyst SD-WAN Manager Storing Passwords in a Recoverable Format Vulnerability is confirmed as actively exploited and is listed in the CISA KEV catalog.
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.
CISA 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
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.
Severity
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:HExploitation Context
as of October 13, 2026- CISA added CVE-2026-20128 to the KEV catalog 54 days after its CVE record was published. The median for entries added in 2026 so far is 15 days.
- It is one of 100 Cisco entries in the CISA KEV catalog, and one of 18 added in 2026.
- Its current EPSS score (7.1%) is higher than that of 21% of CISA KEV entries.
Affected Products
| Vendor | Product | Affected versions |
|---|---|---|
| Cisco | Cisco Cisco Catalyst SD-WAN Manager | 20.1.12 19.2.1 18.4.4 18.4.5 20.1.1.1 20.1.1 19.3.0 19.2.2 19.2.099 18.3.6 18.3.7 19.2.0 18.3.8 19.0.0 19.1.0 18.4.302 18.4.303 19.2.097 19.2.098 17.2.10 18.3.6.1 19.0.1a 18.2.0 18.4.3 18.4.1 17.2.8 18.3.3.1 18.4.0 18.3.1 17.2.6 17.2.9 18.3.4 17.2.5 18.3.1.1 18.3.5 18.4.0.1 18.3.3 17.2.7 18.3.0 19.2.3 18.4.501_ES 20.3.1 20.1.2 19.2.929 19.2.31 20.3.2 19.2.32 20.3.2.1 20.3.2.1_927 18.4.6 20.3.2_928 20.3.2_929 20.4.1.0.1 20.3.2.1_930 19.2.4 20.5.0.1.1 20.4.1.1 20.3.3 19.2.4.0.1 20.3.2_937 20.5.1 20.1.3 20.3.3.0.4 20.3.3.1.2 20.3.3.1.1 20.4.1.2 20.3.3.0.2 20.4.1.1.5 20.4.1.0.02 20.3.3.1.7 20.3.3.1.5 20.5.1.0.1 20.3.3.1.10 20.3.3.0.8 20.4.2 20.3.4 20.3.3.0.14 19.2.4.0.8 19.2.4.0.9 20.3.4.0.1 20.3.2.0.5 20.5.1.0.2 20.6.1.1 20.6.0.18.3 20.3.2.0.6 20.6.0.18.4 20.4.2.0.2 20.3.3.0.16 20.6.1.0.1 20.3.4.0.6 20.7.1EFT2 20.3.4.0.9 20.3.4.0.11 20.3.3.0.18 20.6.2.1 20.3.4.1 20.4.2.1 20.4.2.1.1 20.3.4.1.1 20.3.813 20.3.4.0.19 20.4.2.2.1 20.5.1.2 20.3.814 20.4.2.2 20.6.2.2 20.3.4.2.1 20.3.4.1.2 20.3.4.0.20 20.6.2.2.3 20.4.2.2.2 20.6.2.0.4 20.3.4.0.24 20.6.2.2.7 20.3.4.2.2 20.4.2.2.4 20.3.5.0.8 20.3.5.0.9 20.3.5.0.7 20.6.3.0.2 20.9.1EFT2 20.3.6 20.3.7 20.4.2.3 20.3.5.1 20.3.4.3 20.3.3.2 20.3.7.1 20.3.4.0.25 20.6.2.2.4 20.6.1.2 20.1.3.1 20.6.5.1.4 20.3.8 20.12.501 26.1.1 |
References
1 LinksRecord Details
More from Cisco
Cisco Catalyst SD-WAN Manager Exposure of Sensitive Information to an Unauthorized Actor Vulnerability
Cisco Catalyst SD-WAN Manager Arbitrary File Write Vulnerability
Cisco Catalyst SD-WAN Controller Authenticated Privilege Escalation Vulnerability
Cisco Catalyst SD-WAN Manager System Account Authorization Bypass Vulnerability
CVE record data © The MITRE Corporation, used under the CVE Terms of Use. Exploited-in-the-wild data from the CISA Known Exploited Vulnerabilities catalog (CC0). Exploit prediction scores by FIRST EPSS (first.org/epss). This site is not endorsed or certified by MITRE, NVD, CISA, or FIRST.