- Medium 6.5
- Known exploited (CISA KEV)
CVE-2026-20262
A vulnerability in the web UI of Cisco Catalyst SD-WAN Manager, formerly SD-WAN vManage, could allow an authenticated, remote attacker to create a file or overwrite any file on the filesystem of an affected system. This vulnerability exists because the affected software does not properly validate user-supplied input during a file upload process. An attacker could exploit this vulnerability by sending a crafted HTTP request to an affected API endpoint of the affected system. A successful exploit could allow the attacker to create or overwrite any file on the underlying operating system. This f…
Scores
The facts
- Published
- 15 June 2026
- Last changed
- 24 July 2026
- NVD status
- Analyzed
- Severity
- Medium, CVSS 6.5 out of 10 (version 3.1)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N - Weakness
- Affects
- cisco catalyst sd-wan manager
- Known exploited
- Yes. CISA added it to the Known Exploited Vulnerabilities catalogue on 15 June 2026.
- EPSS
- 28.2% chance of exploitation activity in the next 30 days (percentile 98).
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