CVE-2026-20126 is a high-severity vulnerability (CVSS 8.8) affecting Cisco Catalyst SD-WAN Manager. It allows an authenticated, low-privileged local attacker to gain root privileges on the underlying operating system due to an insufficient user authentication mechanism in the REST API. A successful exploit grants full control over the system. There is no evidence of active exploitation, nor is public exploit code available, though the vulnerability has garnered some community discussion.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 20.9.8.2CPE matchmatch criteria | cpe:2.3:a:cisco:catalyst_sd-wan_manager:*:*:*:*:*:*:*:* | ||
>= 20.11, < 20.12.5.3CPE matchmatch criteria | cpe:2.3:a:cisco:catalyst_sd-wan_manager:*:*:*:*:*:*:*:* | ||
>= 20.13, < 20.15.4.2CPE matchmatch criteria | cpe:2.3:a:cisco:catalyst_sd-wan_manager:*:*:*:*:*:*:*:* | ||
>= 20.16, < 20.18.2.1CPE matchmatch criteria | cpe:2.3:a:cisco:catalyst_sd-wan_manager:*:*:*:*:*:*:*:* | ||
20.12.6CPE matchmatch criteria | cpe:2.3:a:cisco:catalyst_sd-wan_manager:20.12.6:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.