Is CVE-2026-20308 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-20308?

CVE-2026-20308 has a CVSS v3 severity of MEDIUM (4.3).

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CVE-2026-20308

Description

A vulnerability in the web-based management interface of Cisco IOS XE Software could allow an authenticated, remote attacker with low privileges to perform a denial of service (DoS) attack against an affected device. This vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by sending crafted input to the web-based management interface of an affected device. A successful exploit could allow the attacker to cause the web-based management interface to become unresponsive.