Denial of Service Vulnerability in Cisco IOS XE Software's Web Management Interface
CVE-2026-20308

4.3MEDIUM

Key Information:

Vendor

Cisco
Status
Cisco iOS Xe Software
Vendor
CVE Published:
5 August 2026

Badges

👾 Exploit Exists

What is CVE-2026-20308?

A vulnerability exists within the web-based management interface of Cisco IOS XE Software that could enable an authenticated remote attacker with low privileges to execute a denial of service (DoS) attack. This issue arises from insufficient input validation. By sending specially crafted input to the web management interface, an attacker may trigger the interface to become unresponsive, disrupting management access to the device.

Affected Version(s)

Cisco IOS XE Software 17.2.1a

Cisco IOS XE Software 16.12.1y

Cisco IOS XE Software 16.12.3s

References

https://sec.cloudapps.cisco.com/security/center/content/C...

CVSS V3.1

Score:
4.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

.