Is CVE-2013-6021 being actively exploited?

CVE-2013-6021 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2013-6021?

CVE-2013-6021 has a CVSS 2.0 base score of 9.3 (HIGH).

CVE-2013-6021

HIGH · CVSS 9.3EPSS 11.7%EU EUVD

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.

Key facts

CVSS score: 9.3 (v2.0)
Severity: HIGH
CVSS vector: AV:N/AC:M/Au:N/C:C/I:C/A:C
Weakness (CWE): CWE-119
EPSS score: 11.7% (96th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2013-5851)
Published: October 19, 2013
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2013-5851 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.

View on the EU Vulnerability Database

Affected products

watchguard / fireware
watchguard / fireware
watchguard / fireware
watchguard / fireware
watchguard / fireware
watchguard / fireware
watchguard / fireware
watchguard / fireware
watchguard / fireware
watchguard / fireware
watchguard / fireware
watchguard / fireware

Certified products that may be affected

1 FIPS 140 or Common Criteria certified product, from automated matching by sec-certs.org.

WatchGuard XTM Firewalls and Fireware XTM Operating System v11.5.1 - WatchGuard Technologies, Inc. - Common Criteria 383-4-160 - archived

References

http://osvdb.org/98752
http://watchguardsecuritycenter.com/2013/10/17/watchguard-dimension-and-fireware-xtm-11-8/(Vendor Advisory)
http://watchguardsecuritycenter.com/2013/10/17/xtm-11-8-secfixes/(Vendor Advisory)
http://www.exploit-db.com/exploits/29273(Exploit)
http://www.kb.cert.org/vuls/id/233990(Patch, US Government Resource)
http://www.securityfocus.com/bid/63227(Exploit)
https://funoverip.net/2013/10/watchguard-cve-2013-6021-stack-based-buffer-overflow-exploit/(Exploit)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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