CVE-2007-4430

Cisco IOS 12.0-12.4 - Denial of Service via 'show ip bgp regexp' Command

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2007-4430. PoCs published by anonymous.

AI-analyzed exploit summary This exploit leverages a denial-of-service vulnerability in Cisco IOS by sending malformed CLI commands via authenticated sessions or web interfaces like 'Looking Glass'. The commands trigger a device reboot due to improper handling of regex patterns in BGP-related queries.

Description

Unspecified vulnerability in Cisco IOS 12.0 through 12.4 allows context-dependent attackers to cause a denial of service (device restart and BGP routing table rebuild) via certain regular expressions in a "show ip bgp regexp" command. NOTE: unauthenticated remote attacks are possible in environments with anonymous telnet and Looking Glass access.

Exploits (1)

exploitdb WORKING POC VERIFIED
by anonymous · textdoshardware
https://www.exploit-db.com/exploits/30506

This exploit leverages a denial-of-service vulnerability in Cisco IOS by sending malformed CLI commands via authenticated sessions or web interfaces like 'Looking Glass'. The commands trigger a device reboot due to improper handling of regex patterns in BGP-related queries.

Classification
Working Poc 90%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: Cisco IOS 12.0, 12.1, 12.2, 12.3, 12.4
Auth required
Prerequisites: authenticated access to the device or a vulnerable web interface
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (9)

Core 9
Core References
Various Sources mailing-list x_refsource_mlist
https://puck.nether.net/pipermail/cisco-nsp/2007-August/043002.html
Various Sources x_refsource_misc
http://www.heise-security.co.uk/news/94526/
Various Sources mailing-list x_refsource_mlist
https://puck.nether.net/pipermail/cisco-nsp/2007-August/043010.html
Vendor Advisory third-party-advisory x_refsource_secunia
http://secunia.com/advisories/26798
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/25352
Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack
http://www.securitytracker.com/id?1018685
Vendor Advisory vdb-entry x_refsource_vupen
http://www.vupen.com/english/advisories/2007/3136

Scores

EPSS 0.2697
EPSS Percentile 96.4%

Details

CWE
CWE-20
Status published
Products (22)
cisco/cbos
cisco/cbos 12.1
cisco/cbos 12.2
cisco/cli
cisco/ids
cisco/ios 10.0
cisco/ios 10.3
cisco/ios 11.0
cisco/ios 11.1
cisco/ios 11.2
... and 12 more
Published Aug 20, 2007
Tracked Since Feb 18, 2026