Exploited vulnerability · CISA KEV

Is CVE-2026-20245 exploited? Yes: in CISA KEV since 9 Jun 2026

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

Yes. CVE-2026-20245, Cisco Catalyst SD-WAN Manager Improper Encoding or Escaping of Output Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 9 Jun 2026, 5 days after it was published. It affects Cisco Catalyst SD-WAN Manager. If you run it, CISA's required action is: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

exploitedYesCISA KEV · 9 Jun 2026

ransomwareNot knownno confirmed use

EPSStop 5%very likely to be exploited

severity7.8CVSS 3.1 · high

US federal due23 Jun 2026BOD 22-01 deadline

What it is

Cisco Catalyst SD-WAN Manager formerly SD-WAN vManage contains an improper encoding or escaping of output vulnerability. This vulnerability could allow an authenticated, local attacker to execute arbitrary commands as root by supplying a crafted file to the affected system.

Vendor	Cisco (103 exploited CVEs in KEV)
Product	Catalyst SD-WAN Manager
Vulnerability	Cisco Catalyst SD-WAN Manager Improper Encoding or Escaping of Output Vulnerability
Weakness	CWE-116
Published	4 Jun 2026
Added to KEV	9 Jun 2026
Reported by (CNA)	cisco

What to do

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.
Apply the fix. Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
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 4 Jun 2026.
Get told next time. Email alerts when CISA adds a CVE for Cisco.

Other exploited CVEs in Catalyst SD-WAN Manager

CVE-2026-76504: Cisco Catalyst SD-WAN Manager Hex Encoding Vulnerability (30 Sep 2026)
CVE-2026-20262: Cisco Catalyst SD-WAN Manager Directory or Path Traversal Vulnerability (15 Jun 2026)
CVE-2026-20133: Cisco Catalyst SD-WAN Manager Exposure of Sensitive Information to an Unauthorized Actor Vulnerability (20 Apr 2026)
CVE-2026-20128: Cisco Catalyst SD-WAN Manager Storing Passwords in a Recoverable Format Vulnerability (20 Apr 2026)

References

Questions

Is CVE-2026-20245 being exploited?

Yes. CISA added CVE-2026-20245 to the Known Exploited Vulnerabilities catalog on 9 Jun 2026, which means there is reliable evidence of exploitation in the wild.

Is CVE-2026-20245 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-2026-20245?

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. 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 June 2026 · Cisco scorecard · act-now radar.

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