CVE-2022-20804 Cisco Unified Communications Products Denial of Service Vulnerability
An unauthenticated adjacent attacker can cause a kernel panic and denial of service by sending malicious Cisco Discovery Protocol packets to Cisco Unified Communications Manager.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2022-20804?
CVE-2022-20804 is a medium-severity denial of service vulnerability in Cisco Unified Communications Manager, published on 21 Apr 2022. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability in the Cisco Discovery Protocol of Cisco Unified Communications Manager (Unified CM) and Cisco Unified Communications Manager Session Management Edition (Unified CM SME) could allow an unauthenticated, adjacent attacker to cause a kernel panic on an affected system, resulting in a denial of service (DoS) condition. This vulnerability is due to incorrect processing of certain Cisco Discovery Protocol packets. An attacker could exploit this vulnerability by continuously sending certain Cisco Discovery Protocol packets to an affected device. A successful exploit could allow the attacker to cause a kernel panic on the system that is running the affected software, resulting in a DoS condition.
Weakness: CWE-754
Which versions are affected by CVE-2022-20804?
It affects 1 product.
Products include Cisco Unified Communications Manager.
How do I fix CVE-2022-20804?
No fix has been published for CVE-2022-20804 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2022-20804 being exploited?
There is no known exploitation of CVE-2022-20804 in the wild and no public exploit code.
Other vulnerabilities in Cisco Unified Communications Manager
- CVE-2026-20230 Cisco Unified Communications Manager Server-Side Request Forgery (SSRF)
- CVE-2026-20045 Cisco Unified Communications Products Code Injection
- CVE-2025-20309 Cisco Unified Communications Manager Static SSH Credentials Vulnerability
- CVE-2011-1643 Information disclosure in n/a
- CVE-2024-20253 Deserialization in Cisco Packaged Contact Center Enterprise
Sources
Also known as GHSA-x87q-gpr2-r7wm.