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CVE-2009-2053

21
FAUCET Score

CVE-2009-2053 describes a denial-of-service vulnerability in Cisco Unified Communications Manager (CUCM) versions 4.x, 5.x, 6.x, and specific 7.x releases. This flaw allows remote attackers to exhaust file descriptors and cause an SCCP outage by flooding the system with TCP packets. With a CVSS score of 7.8 (High), it is easily exploitable over the network with low attack complexity, leading to a complete loss of availability. There is no public exploit code available, nor is there evidence of active exploitation or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
>= 5.0, < 5.1\(3g\)CPE matchmatch criteria
cpe:2.3:a:cisco:unified_communications_manager:*:*:*:*:*:*:*:*
>= 6.1\(1\), < 6.1\(4\)CPE matchmatch criteria
cpe:2.3:a:cisco:unified_communications_manager:*:*:*:*:*:*:*:*
>= 7.0, < 7.0\(2a\)su1CPE matchmatch criteria
cpe:2.3:a:cisco:unified_communications_manager:*:*:*:*:*:*:*:*
>= 7.1, < 7.1\(2\)CPE matchmatch criteria
cpe:2.3:a:cisco:unified_communications_manager:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.8HIGH

AV:N/AC:L/Au:N/C:N/I:N/A:C

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
6.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
3.41%
Probability of exploitation in next 30 days
EPSS Percentile
87.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0341 is in the 78th percentile among its peer group of 51,553 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

osvdb.org / 57455
Broken Link
secunia.com / advisories/36498
Vendor Advisory
secunia.com / advisories/36499
Vendor Advisory
cisco.com / en/US/products/products_security_advisory09186a0080af2d11.shtml
PatchVendor Advisory
securityfocus.com / bid/36152
Third Party AdvisoryVDB Entry
securitytracker.com / id
Third Party AdvisoryVDB Entry