CVE-2013-6021 Memory corruption in n/a

What is CVE-2013-6021?

CVE-2013-6021 is a critical memory corruption vulnerability in Watchguard Fireware, published on 19 Oct 2013. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official 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.

Weakness: CWE-119

Which versions are affected by CVE-2013-6021?

It affects 1 product.

Products include Watchguard Fireware.

How do I fix CVE-2013-6021?

No fix has been published for CVE-2013-6021 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2013-6021 being exploited?

There is no known exploitation of CVE-2013-6021 in the wild and no public exploit code.

Public exploit code: 1 Exploit-DB entry.

Other vulnerabilities in Watchguard Fireware

• CVE-2022-26318 WatchGuard Firebox and XTM Appliances Arbitrary Code Execution Exploited Critical 9.8
• CVE-2025-14733 WatchGuard Firebox Out of Bounds Write Exploited Critical 9.3
• CVE-2025-9242 WatchGuard Firebox Out-of-Bounds Write Exploited Critical 9.3
• CVE-2022-23176 WatchGuard Firebox and XTM Privilege Escalation Exploited High 8.8
• CVE-2022-31789 Integer overflow in n/a Critical 9.8

All Watchguard Fireware vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-cvrh-vhwc-w6wr.