CVE-2026-20311

MEDIUM CVSS 3.1: 6.3 EPSS 0.16%
Updated Aug 06, 2026
Cisco
Parameter Value
CVSS 6.3 (MEDIUM)
Type CWE-126
Vendor Cisco
Public PoC No

A vulnerability in the web-based management interface of Cisco IOS XE Software could allow an authenticated, remote attacker with low privileges to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to insufficient error handling in the web-based management interface. An attacker could exploit this vulnerability by authenticating with a malformed certificate.

A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
High
Difficult to exploit
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
High
Complete denial of service

CVSS Vector v3.1

Weakness Type (CWE)