CVE-2013-6021

WatchGuard Fireware < 11.8 - Remote Code Execution via Long Session ID Cookie

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2013-6021. PoCs published by st3n.

AI-analyzed exploit summary This exploit targets a remote buffer overflow in WatchGuard Firewall XTM version 11.7.4u1 via the sessionid cookie. It uses a heap spray technique and shellcode to bypass authentication and gain remote code execution.

Description

Buffer overflow in WGagent in WatchGuard WSM and Fireware before 11.8 allows remote attackers to execute arbitrary code via a long sessionid value in a cookie.

Exploits (1)

exploitdb WORKING POC
by st3n · perlremotehardware
https://www.exploit-db.com/exploits/29273

This exploit targets a remote buffer overflow in WatchGuard Firewall XTM version 11.7.4u1 via the sessionid cookie. It uses a heap spray technique and shellcode to bypass authentication and gain remote code execution.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Complex
Reliability
Reliable
Target: WatchGuard Firewall XTM <= 11.7.4u1
No auth needed
Prerequisites: Network access to the target's web console · SSL connectivity to the target
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (7)

Core 7
Core References
Exploit exploit x_refsource_exploit-db
http://www.exploit-db.com/exploits/29273
Third Party Advisory, VDB Entry vdb-entry x_refsource_osvdb
http://osvdb.org/98752
Exploit vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/63227
Patch, US Government Resource third-party-advisory x_refsource_cert-vn
http://www.kb.cert.org/vuls/id/233990

Scores

EPSS 0.5403
EPSS Percentile 98.1%

Details

CWE
CWE-119
Status published
Products (12)
watchguard/fireware 11.0.2
watchguard/fireware 11.1
watchguard/fireware 11.2.3
watchguard/fireware 11.3
watchguard/fireware 11.3.6
watchguard/fireware 11.4
watchguard/fireware 11.4.2
watchguard/fireware 11.5.1
watchguard/fireware 11.5.3
watchguard/fireware 11.6.6
... and 2 more
Published Oct 19, 2013
Tracked Since Feb 18, 2026