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Vulnerabilities

Vulnerability · CVE-2013-6021

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.

Published Oct 19, 2013 · catalog updated Jun 16, 2026 · Buffer overflow in WGagent

Last checked Nov 7, 2026. A connected source was read within the last 7 days.

Check this week

CVE-2013-6021 is not in CISA KEV. FIRST estimates a 11.73% chance of exploitation in the next 30 days. Check whether you run Buffer overflow in WGagent.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Buffer overflow in WGagent).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
Critical9.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
11.73%
Remediation
Version ranges on file
Affected products
cpe watchguard/fireware

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe watchguard/fireware11.0.2
  • cpe watchguard/fireware11.1
  • cpe watchguard/fireware11.2.3
  • cpe watchguard/fireware11.3
  • cpe watchguard/fireware11.3.6
  • cpe watchguard/fireware<= 11.7.4

How to fix CVE-2013-6021

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2013-6021 is not in CISA KEV. FIRST estimates a 11.73% chance of exploitation in the next 30 days. Check whether you run Buffer overflow in WGagent.

Which versions are affected?

Compare what you have installed with 11.0.2, 11.1, 11.2.3, 11.3, 11.3.6, <= 11.7.4. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-119: Buffer Overflow. EPSS 11.73%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

WatchGuard Fireware security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 19, 2013 · Monitored products — high

    Detected

    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.

  2. Jun 16, 2026 · Monitored products — high

    Updated

    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.

Sources

  • CVE.orgVulnerability recordCVE-2013-6021

    Official CVE identifier

    cve.org
  • Monitored products — highVendor advisoryCVE-2013-6021

    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.

    nvd.nist.gov

References

Freshness

Last verified in this catalog Nov 6, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • CVE.orgNov 7, 2026
  • Monitored products — highNov 6, 2026