CVE-2026-20262
Actively exploited. CVE-2026-20262 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-06-15) — exploitation has been observed in the wild, and US federal agencies are required to remediate it under BOD 22-01. Treat patching as urgent.
Public exploit code is available. Proof-of-concept or working exploit code for CVE-2026-20262 is indexed in GitHub PoC. Expect opportunistic scanning and exploitation attempts — prioritize remediation.
Cisco has fixed a vulnerability in Cisco Catalyst SD-WAN Manager. The vulnerability is in the web user interface of Cisco Catalyst SD-WAN Manager and concerns a directory traversal flaw. This is caused by improper input validation during the file upload process. An authenticated attacker can create or overwrite arbitrary files on the underlying system. Upon successful exploitation, the attacker can gain root-level access, affecting system integrity. Cisco reports having information that the vulnerability has been exploited in a limited manner.
CSIRTS triage
- What
- The vulnerability is a directory traversal flaw in the web user interface.
- Who is affected
- Authenticated attackers can exploit this vulnerability to gain root-level access.
- Urgency
- Remediation is urgent due to confirmed limited exploitation.
- Action
- Apply the latest patches provided by Cisco.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Exploitation confirmedAlready exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 94% of all EPSS-scored CVEs.
Exploit availability
Public exploit or proof-of-concept code for CVE-2026-20262 is indexed in these free datasets. Available exploit code raises real-world risk independent of the CVSS score.
- GitHub PoCPublic proof-of-concept repositories on GitHub reference this CVE.look it up ↗
Advisory coverage (3)
- unknownNCSC-2026-0199 [1.00] [M/H] Vulnerability fixed in Cisco Catalyst SD-WAN Managerncsc-nl · 2026-06-16
- mediumexploitedCisco Catalyst SD-WAN Manager Arbitrary File Write Vulnerabilitycisco-psirt · 2026-06-15
- criticalexploitedCVE-2026-20262: Cisco Catalyst SD-WAN Manager Directory or Path Traversal Vulnerabilitycisa-kev · 2026-06-15
External references
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