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CVE-2013-6021

40
FAUCET Score

CVE-2013-6021 describes a critical buffer overflow vulnerability in the WGagent component of WatchGuard WSM and Fireware versions prior to 11.8. This flaw allows remote attackers to execute arbitrary code by sending a crafted, excessively long sessionid value within a cookie. With a CVSS score of 9.3, this vulnerability is highly severe, requiring medium attack complexity but granting complete confidentiality, integrity, and availability compromise. While not listed in CISA's KEV catalog and showing no active community discussion or media coverage, a public exploit (EDB-29273) exists, indicating its potential for exploitation.

Impacted Technologies

VendorProductVersion(s)CPE
<= 11.7.4CPE matchmatch criteria
cpe:2.3:o:watchguard:fireware:*:*:*:*:*:*:*:*
11.0.2CPE matchmatch criteria
cpe:2.3:o:watchguard:fireware:11.0.2:*:*:*:*:*:*:*
11.1CPE matchmatch criteria
cpe:2.3:o:watchguard:fireware:11.1:*:*:*:*:*:*:*
11.2.3CPE matchmatch criteria
cpe:2.3:o:watchguard:fireware:11.2.3:*:*:*:*:*:*:*
11.3CPE matchmatch criteria
cpe:2.3:o:watchguard:fireware:11.3:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

9.3HIGH

AV:N/AC:M/Au:N/C:C/I:C/A:C

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
12.20%
Probability of exploitation in next 30 days
EPSS Percentile
95.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
ExploitDB: EDB-29273 · Oct 29, 2013
This CVE's current EPSS score of 0.1220 is in the 78th percentile among its peer group of 8,914 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

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