CVE-2007-4459
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.
Key facts
- CVSS score
- 7.1 (v2.0)
- Severity
- HIGH
- CVSS vector
AV:N/AC:M/Au:N/C:N/I:N/A:C- Weakness (CWE)
- CWE-20
- EPSS score
- 14.0% (97th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2007-4442)
- Published
- August 21, 2007
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2007-4442 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.
View on the EU Vulnerability DatabaseAffected products
- cisco / voip phone cp-7940
- cisco / voip phone cp-7940
- cisco / voip phone cp-7940
- cisco / voip phone cp-7940
- cisco / voip phone cp-7940
- cisco / voip phone cp-7960
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(Patch, Vendor Advisory)
- 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(Exploit)
- http://www.vupen.com/english/advisories/2007/2928(Vendor Advisory)
- https://exchange.xforce.ibmcloud.com/vulnerabilities/36125
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
Query CVEs from your AI assistant
The CVE/NVD Explorer brain answers CVE questions directly inside Claude, ChatGPT, or any MCP assistant — always up to date, no setup. Add it once and stop pasting advisories into chat.
Add the CVE brain