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CVE-2025-61962

20
FAUCET Score

CVE-2025-61962 describes a denial-of-service vulnerability in fetchmail versions prior to 6.5.6, where the SMTP client can crash when encountering a malformed 334 status code during authentication. This medium-severity vulnerability (CVSS 5.9) has a high impact on availability, requiring high attack complexity but no user interaction. Currently, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 5.9.9, < 6.5.6CPE match
cpe:2.3:a:fetchmail:fetchmail:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.9MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.2
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.38%
Probability of exploitation in next 30 days
EPSS Percentile
31.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0038 is in the 4th percentile among its peer group of 19,958 CVEs.

Social Chatter

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

Remediation

Vendor Patches (5)

redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 10Fixed in: fetchmail
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: fetchmail
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: fetchmail
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: fetchmail
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: fetchmail

Vendor Advisories (1)

redhatCVE-2025-61962Moderate

fetchmail: Fetchmail denial of service

Oct 4, 2025

References

openwall.com / lists/oss-security/2025/10/04/3
gitlab.com / fetchmail/fetchmail/-/commit/4c3cebfa4e659fb778ca2cae0ccb3f69201609a8
fetchmail.info / fetchmail-SA-2025-01.txt
openwall.com / lists/oss-security/2025/10/03/2