Is CVE-2009-2052 being actively exploited?

CVE-2009-2052 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2009-2052?

CVE-2009-2052 has a CVSS 2.0 base score of 7.8 (HIGH).

CVE-2009-2052

HIGH · CVSS 7.8EPSS 4.0%EU EUVD

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(2), and 7.1 before 7.1(2); and Cisco Unified Presence 1.x, 6.x before 6.0(6), and 7.x before 7.0(4); allows remote attackers to cause a denial of service (TCP services outage) via a large number of TCP connections, related to "tracking of network connections," aka Bug IDs CSCsq22534 and CSCsw52371.

Key facts

CVSS score: 7.8 (v2.0)
Severity: HIGH
CVSS vector: AV:N/AC:L/Au:N/C:N/I:N/A:C
EPSS score: 4.0% (91th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2009-2048)
Published: August 27, 2009
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2009-2048 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.

View on the EU Vulnerability Database

Affected products

cisco / unified communications manager

References

http://secunia.com/advisories/36498(Vendor Advisory)
http://secunia.com/advisories/36499(Vendor Advisory)
http://secunia.com/advisories/37039(Third Party Advisory)
http://securitytracker.com/id?1023018(Third Party Advisory, VDB Entry)
http://www.cisco.com/en/US/products/products_security_advisory09186a0080af2d11.shtml(Patch, Vendor Advisory)
http://www.cisco.com/en/US/products/products_security_advisory09186a0080afc930.shtml(Vendor Advisory)
http://www.securityfocus.com/bid/36152(Third Party Advisory, VDB Entry)
http://www.securityfocus.com/bid/36676(Third Party Advisory, VDB Entry)
http://www.securitytracker.com/id?1022775(Third Party Advisory, VDB Entry)
http://www.vupen.com/english/advisories/2009/2915(Third Party Advisory)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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