Improper privilege management in Cisco IOS XE - CVE-2026-20308
Published: August 6, 2026
Vulnerability identifier: #VU141024
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-20308
CWE-ID: CWE-269
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to cause a denial of service.
The vulnerability exists due to insufficient input validation in the web-based management interface when handling crafted input. A remote user can send crafted input to cause a denial of service.
Only devices with the web-based management interface enabled are vulnerable.
Affected software
Cisco IOS XE
How to mitigate CVE-2026-20308
Install security update from vendor's website.
Cisco IOS XE - addressed in versions 17.12.8, 17.15.6, 17.18.4