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CVE-2001-1496

31
FAUCET Score

CVE-2001-1496 describes an off-by-one buffer overflow in the Basic Authentication component of Acme Labs thttpd versions 1.95 through 2.20. This critical vulnerability, with a CVSS score of 9.8, allows unauthenticated remote attackers to cause a denial of service and potentially execute arbitrary code. Despite its age, there is no evidence of active exploitation, nor are there publicly available exploit modules in Metasploit or Nuclei, though it has garnered significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
>= 1.95, <= 2.20CPE matchmatch criteria
cpe:2.3:a:acme:thttpd:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
4.84%
Probability of exploitation in next 30 days
EPSS Percentile
91.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0484 is in the 85th percentile among its peer group of 36,829 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

exchange.xforce.ibmcloud.com / vulnerabilities/7595
Third Party AdvisoryVDB Entry
securityfocus.com / archive/1/241310
Broken LinkThird Party AdvisoryVDB Entry
securityfocus.com / archive/1/241953
Broken LinkThird Party AdvisoryVDB Entry
securityfocus.com / bid/3562
Broken LinkThird Party AdvisoryVDB Entry