CVE-2007-4459

Severity: high (CVSS 7.1 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 14.0% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2007-08-21 · updated 2026-06-16
Weakness: CWE-20

Description

Cisco IP Phone 7940 and 7960 with P0S3-08-6-00 firmware, and other SIP firmware before 8.7(0), allows remote attackers to cause a denial of service (device reboot) via (1) a certain sequence of 10 invalid SIP INVITE and OPTIONS messages; or (2) a certain invalid SIP INVITE message that contains a remote tag, followed by a certain set of two related SIP OPTIONS messages.

Affected products

Cisco Voip Phone Cp-7940: through 8.70; 3.0-p0s3-08-6-00_firmware, 3.1-p0s3-08-6-00_firmware, 3.2-p0s3-08-6-00_firmware, 8.6-p0s3-08-6-00_firmware
Cisco Voip Phone Cp-7960: through 8.70

References

http://lists.grok.org.uk/pipermail/full-disclosure/2007-August/065401.html
http://lists.grok.org.uk/pipermail/full-disclosure/2007-August/065402.html
http://secunia.com/advisories/26547
http://securityreason.com/securityalert/3042
http://securitytracker.com/id?1018591
http://www.cisco.com/warp/public/707/cisco-sr-20070821-sip.shtml
http://www.osvdb.org/36695
http://www.securityfocus.com/bid/25378
http://www.vupen.com/english/advisories/2007/2928
https://exchange.xforce.ibmcloud.com/vulnerabilities/36125
http://lists.grok.org.uk/pipermail/full-disclosure/2007-August/065401.html
http://lists.grok.org.uk/pipermail/full-disclosure/2007-August/065402.html

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