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CVE-2009-4660

76
FAUCET Score

CVE-2009-4660 describes a critical stack-based buffer overflow vulnerability in the AntServer Module (AntServer.exe) of BigAnt IM Server 2.50. This flaw allows unauthenticated remote attackers to execute arbitrary code on affected systems by sending a specially crafted, long GET request to TCP port 6660. With a CVSS score of 10.0, it represents a severe risk due to its network-based attack vector, low complexity, and complete compromise of confidentiality, integrity, and availability. While not listed on CISA's KEV catalog, multiple public exploit modules exist, including Metasploit and ExploitDB entries, indicating readily available exploit code, though community discussion and media coverage are minimal.

Impacted Technologies

VendorProductVersion(s)CPE
2.50CPE matchmatch criteria
cpe:2.3:a:bigantsoft:bigant_messenger:2.50:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

10.0HIGH

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

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

Exploit Intelligence

EPSS Score
62.12%
Probability of exploitation in next 30 days
EPSS Percentile
99.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
Metasploit: BigAnt Server 2.52 USV Buffer Overflow · Dec 29, 2009
ExploitDB: EDB-9690 · Sep 15, 2009
This CVE's current EPSS score of 0.6212 is in the 98th percentile among its peer group of 51,551 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 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

secunia.com / advisories/36704
Vendor Advisory
attrition.org / pipermail/vim/2009-September/002271.html
exploit-db.com / exploits/9673
exploit-db.com / exploits/9690
securityfocus.com / bid/36407
Exploit
vupen.com / english/advisories/2009/2679
Vendor Advisory