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Vulnerability record · CVE-2007-5537 · published 18 October 2007

CVE-2007-5537: Cisco unified callmanager vulnerability

Cisco · Unified Callmanager

Cisco Unified Communications Manager (CUCM, formerly CallManager) 5.1 before 5.1(2), and Unified CallManager 5.0, allow remote attackers to cause a denial of service (kernel panic) via a flood of SIP INVITE messages to UDP port 5060, which triggers resource exhaustion, aka CSCsi75822.

7.8 CVSS 2.0 High EPSS 2.0% · top 20.2% CWE-399 · CWE-399
7.8CVSS 2.0 base score
2.0%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
14References
16 Jun 2026Last modified by NVD

Description

Cisco Unified Communications Manager (CUCM, formerly CallManager) 5.1 before 5.1(2), and Unified CallManager 5.0, allow remote attackers to cause a denial of service (kernel panic) via a flood of SIP INVITE messages to UDP port 5060, which triggers resource exhaustion, aka CSCsi75822.

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

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://osvdb.org/37941
http://secunia.com/advisories/27296
http://www.cisco.com/en/US/products/products_security_advisory09186a00808dda34.shtml
http://www.securityfocus.com/bid/26105
http://www.securitytracker.com/id?1018828
http://www.vupen.com/english/advisories/2007/3532
https://exchange.xforce.ibmcloud.com/vulnerabilities/37246
http://osvdb.org/37941
http://secunia.com/advisories/27296
http://www.cisco.com/en/US/products/products_security_advisory09186a00808dda34.shtml
http://www.securityfocus.com/bid/26105
http://www.securitytracker.com/id?1018828
http://www.vupen.com/english/advisories/2007/3532
https://exchange.xforce.ibmcloud.com/vulnerabilities/37246

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2007-5537), CISA KEV, FIRST EPSS (scores of 2026-10-03). This page is refreshed as NVD updates the record.