CVE-2009-2053 Denial of service in n/a
Remote attackers can cause denial of service in Cisco Unified Communications Manager by flooding TCP packets, leading to file-descriptor exhaustion.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2009-2053?
CVE-2009-2053 is a high-severity denial of service vulnerability in Cisco Unified Communications Manager, published on 27 Aug 2009. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Cisco Unified Communications Manager (aka CUCM, formerly CallManager) 4.x, 5.x before 5.1(3g), 6.x before 6.1(4), 7.0 before 7.0(2a)su1, and 7.1 before 7.1(2) allows remote attackers to cause a denial of service (file-descriptor exhaustion and SCCP outage) via a flood of TCP packets, aka Bug ID CSCsx32236.
Which versions are affected by CVE-2009-2053?
It affects 1 product.
Products include Cisco Unified Communications Manager.
How do I fix CVE-2009-2053?
No fix has been published for CVE-2009-2053 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-2009-2053 being exploited?
There is no known exploitation of CVE-2009-2053 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-8j74-6x75-vf94.