CVE-2007-4459

Cisco IP Phone 7940 and 7960 < 8.70 - Denial of Service via Malformed SIP Messages

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 2 public exploits for CVE-2007-4459. PoCs published by MADYNES.

AI-analyzed exploit summary This exploit sends malformed SIP messages to trigger a denial-of-service condition in vulnerable SIP servers. It uses UDP to send INVITE and OPTIONS requests with crafted headers.

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.

Exploits (2)

exploitdb WORKING POC VERIFIED
by MADYNES · perldoshardware
https://www.exploit-db.com/exploits/4297

This exploit sends malformed SIP messages to trigger a denial-of-service condition in vulnerable SIP servers. It uses UDP to send INVITE and OPTIONS requests with crafted headers.

Classification
Working Poc 90%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: SIP servers (specific version not specified in code)
No auth needed
Prerequisites: Network access to the target SIP server · UDP port accessibility
devstral-2 · analyzed Feb 16, 2026 Full analysis →
exploitdb WORKING POC VERIFIED
by MADYNES · perldoshardware
https://www.exploit-db.com/exploits/4298

This exploit targets a DoS vulnerability in SIP implementations by sending malformed SIP messages. The script crafts multiple SIP INVITE and OPTIONS requests with invalid URLs and malformed headers to trigger a crash or instability in the target system.

Classification
Working Poc 90%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: SIP implementations (e.g., Asterisk, other VoIP software)
No auth needed
Prerequisites: Network access to the target SIP server · UDP port accessibility
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (10)

Core 10
Core References
Exploit vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/25378
Third Party Advisory, VDB Entry vdb-entry x_refsource_xf
https://exchange.xforce.ibmcloud.com/vulnerabilities/36125
Vendor Advisory vendor-advisory x_refsource_cisco
http://www.cisco.com/warp/public/707/cisco-sr-20070821-sip.shtml
Patch, Vendor Advisory third-party-advisory x_refsource_secunia
http://secunia.com/advisories/26547
Third Party Advisory third-party-advisory x_refsource_sreason
http://securityreason.com/securityalert/3042
Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack
http://securitytracker.com/id?1018591
Vendor Advisory vdb-entry x_refsource_vupen
http://www.vupen.com/english/advisories/2007/2928
Third Party Advisory, VDB Entry vdb-entry x_refsource_osvdb
http://www.osvdb.org/36695

Scores

EPSS 0.1399
EPSS Percentile 96.1%

Details

CWE
CWE-20
Status published
Products (6)
cisco/voip_phone_cp-7940 3.0 p0s3-08-6-00_firmware
cisco/voip_phone_cp-7940 3.1 p0s3-08-6-00_firmware
cisco/voip_phone_cp-7940 3.2 p0s3-08-6-00_firmware
cisco/voip_phone_cp-7940 8.6 p0s3-08-6-00_firmware
cisco/voip_phone_cp-7940 < 8.70
cisco/voip_phone_cp-7960 < 8.70
Published Aug 21, 2007
Tracked Since Feb 18, 2026