CVE & CISA-KEV Catalog

CVE-2025-61962

MEDIUM
5.9
CVSS v3
NVD

Description

In fetchmail before 6.5.6, the SMTP client can crash when authenticating upon receiving a 334 status code in a malformed context.

CWE-142

How to fix

Remediation Available
fetchmailAmazon
Fixed in:0:6.5.7-1.amzn2023
Fixed in:0:6.5.7-1.amzn2023
fetchmail-debuginfoAmazon
Fixed in:0:6.5.7-1.amzn2023
Fixed in:0:6.5.7-1.amzn2023
fetchmail-debugsourceAmazon
Fixed in:0:6.5.7-1.amzn2023
Fixed in:0:6.5.7-1.amzn2023
fetchmailDebian
Fixed in:6.5.6-1CVE-2025-61962
fetchmailUbuntu
Fixed in:6.4.27-1ubuntu0.1USN-7838-1
Fixed in:6.4.38-1ubuntu4.1USN-7838-1

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Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork
Attack ComplexityHigh
Privileges RequiredNone
User InteractionNone
ScopeUnchanged

Impact

ConfidentialityNone
IntegrityNone
AvailabilityHigh

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

Exploit Intelligence

0.41%probability of exploitation in 30 days
34thpercentile

Low risk: more likely to be exploited than 34% of all known CVEs.

References

Related Vulnerabilities

Other CWE-142 vulnerabilities, ordered by exploit likelihood. View all

CVESeverityCVSSEPSSExploitedFix
CVE-2025-1774Medium6.30.5%--
CVE-2026-13379Critical9.10.3%-Fix

Common questions

How do I fix CVE-2025-61962?

Published advisories record a fix for 5 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Is CVE-2025-61962 being actively exploited?

Not that we know of. CVE-2025-61962 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.41% is the estimated probability that it will be exploited in the next 30 days. That is higher than 34% of all scored CVEs.

How severe is CVE-2025-61962?

CVE-2025-61962 has a CVSS v3 base score of 5.9, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2025-61962 affect?

Published advisories record a fix for fetchmail (Amazon), fetchmail-debuginfo (Amazon), fetchmail-debugsource (Amazon), fetchmail (Debian), and 1 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-17.