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Exploited vulnerability · CISA KEV

Is CVE-2026-20128 exploited? Yes: in CISA KEV since 20 Apr 2026

Gociux · Cisco Catalyst SD-WAN Manager · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2026-20128, Cisco Catalyst SD-WAN Manager Storing Passwords in a Recoverable Format Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 20 Apr 2026, 54 days after it was published. It affects Cisco Catalyst SD-WAN Manager. If you run it, CISA's required action is: 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.

exploitedYesCISA KEV · 20 Apr 2026
ransomwareNot knownno confirmed use
EPSStop 5%very likely to be exploited
severity7.5CVSS 3.1 · high
US federal due23 Apr 2026BOD 22-01 deadline

What it is

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.

VendorCisco (103 exploited CVEs in KEV)
ProductCatalyst SD-WAN Manager
VulnerabilityCisco Catalyst SD-WAN Manager Storing Passwords in a Recoverable Format Vulnerability
WeaknessCWE-257
Published25 Feb 2026
Added to KEV20 Apr 2026
Reported by (CNA)cisco

What to do

  1. Check whether you run it. Look for Catalyst SD-WAN Manager in your asset inventory, including appliances and cloud images. Stack check lists every exploited Cisco CVE at once.
  2. Apply the fix. 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.
  3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 25 Feb 2026.
  4. Get told next time. Email alerts when CISA adds a CVE for Cisco.

Other exploited CVEs in Catalyst SD-WAN Manager

References

Questions

Is CVE-2026-20128 being exploited?

Yes. CISA added CVE-2026-20128 to the Known Exploited Vulnerabilities catalog on 20 Apr 2026, which means there is reliable evidence of exploitation in the wild.

Is CVE-2026-20128 used in ransomware attacks?

CISA does not list known ransomware use for it. That can change, and exploitation alone is reason to fix it first.

How do I fix CVE-2026-20128?

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. Check Cisco's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected Catalyst SD-WAN Manager and watch it for signs of compromise.

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in April 2026 · Cisco scorecard · act-now radar.

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