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CVE-2002-1721

24
FAUCET Score

CVE-2002-1721 describes an off-by-one error in alterMIME versions 0.1.10 and 0.1.11. This flaw allows remote attackers to trigger a denial of service by crafting an x-header that causes snprintf to overwrite a critical variable with a null byte, leading to a crash. With a CVSS score of 7.5 (High), this vulnerability is easily exploitable over the network with low attack complexity and no user interaction, resulting in a complete loss of availability. Despite its age and high severity, there is no evidence of active exploitation, nor are there known public exploits or Metasploit/Nuclei modules available. However, the vulnerability has garnered significant community discussion, with 10 mentions, indicating ongoing interest.

Impacted Technologies

VendorProductVersion(s)CPE
0.1.10CPE matchmatch criteria
cpe:2.3:a:pldaniels:altermime:0.1.10:*:*:*:*:*:*:*
0.1.11CPE matchmatch criteria
cpe:2.3:a:pldaniels:altermime:0.1.11:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.26%
Probability of exploitation in next 30 days
EPSS Percentile
81.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0226 is in the 66th percentile among its peer group of 51,485 CVEs.

Social Chatter

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

exchange.xforce.ibmcloud.com / vulnerabilities/8992
Third Party AdvisoryVDB Entry
pldaniels.com / altermime/CHANGELOG
Release Notes
securityfocus.com / bid/4650
Broken LinkPatchThird Party AdvisoryVDB Entry