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CVE-2001-0167

65
FAUCET Score

CVE-2001-0167 describes a buffer overflow vulnerability in AT&T WinVNC client versions 3.3.3r7 and earlier. This flaw allows remote attackers to execute arbitrary commands by sending a specially crafted, long rfbConnFailed packet containing an extended reason string. The vulnerability carries a high CVSS score of 7.6, indicating a network-based attack with high complexity, leading to complete compromise of confidentiality, integrity, and availability. While not listed on the KEV catalog, exploit code is available via Metasploit, and its EPSS score suggests a higher-than-average likelihood of exploitation, despite a lack of community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 3.3.3r7CPE matchmatch criteria
cpe:2.3:a:att:winvnc:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.6HIGH

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

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
HIGH
Authentication
NONE
Exploitability Score
4.9
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
50.81%
Probability of exploitation in next 30 days
EPSS Percentile
98.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
Metasploit: RealVNC 3.3.7 Client Buffer Overflow · Jan 29, 2001
ExploitDB: EDB-16489 · Apr 30, 2010
This CVE's current EPSS score of 0.5081 is in the 98th percentile among its peer group of 8,914 CVEs.

Social Chatter

No social media mentions found for this CVE.

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

marc.info
exchange.xforce.ibmcloud.com / vulnerabilities/6025
securityfocus.com / bid/2305
PatchVendor Advisory