CVE-2026-20262: Cisco Catalyst SD-WAN Manager Directory or Path Traversal Vulnerability
What it is
Cisco Catalyst SD-WAN Manager contains a directory or path traversal vulnerability that could allow an authenticated, remote attacker to create a file or overwrite any file on the filesystem of an affected system.
What to do
Schedule the vendor fix into this week’s change window, prioritising internet-facing and business-critical systems. Confirm the fix is applied everywhere, not just where it was easy.
- Priority
- This week: Schedule into this week’s change window.
- Severity (CVSS)
- 6.5 medium
- CISA assessment (SSVC)
- actively exploited; needs manual effort per target; partial control or data exposure
- Exploit probability (EPSS, 30 days)
- 28%, higher than 98% of all CVEs
- Added to CISA KEV
- 15 June 2026
- CISA fix-by date
- 29 June 2026 (US federal agencies; a sensible deadline for everyone)
- Ransomware use
- Not known
- Weakness
- CWE-22
References
- NIST NVD entry
- CISA KEV entry
- sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-s
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20262
Sources: CISA Known Exploited Vulnerabilities · FIRST Exploit Prediction Scoring System (EPSS) · NIST National Vulnerability Database · CISA Vulnrichment (SSVC), via the CVE Program. This product uses data from the NVD API but is not endorsed or certified by the NVD. Summaries are machine-written from CISA’s description; treat the vendor’s advisory as the authority for fixes.