CVE-2026-20308

Cisco IOS XE Software Web-Based Management Interface Vulnerability

Published Aug 5, 2026 CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Cisco
Cisco ios Xe Software
Vendors & Products Cisco
Cisco ios Xe Software
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title Cisco IOS XE Software Web-Based Management Interface Vulnerability
Weaknesses CWE-269
References
Metrics cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
cisco
Published
Updated
Aug 5, 2026, 5:45 PM
Reserved
Oct 8, 2025, 11:59 AM
Status
Awaiting Analysis
Published
Aug 5, 2026, 5:16 PM
Modified
Oct 23, 2026, 9:10 PM