CVE-2025-61962

MEDIUMNVD 5.95.9—

5.9

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

CVSS v3: 5.9
EG Score: 5.9(medium)
EPSS: 19.3%
KEV: Not listed

Published

October 4, 2025

Last Modified

April 15, 2026

References (4)

cve@mitrehttps://gitlab.com/fetchmail/fetchmail/-/commit/4c3cebfa4e659fb778ca2cae0ccb3f69201609a8
cve@mitrehttps://www.fetchmail.info/fetchmail-SA-2025-01.txt
cve@mitrehttps://www.openwall.com/lists/oss-security/2025/10/03/2
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2025/10/04/3

Patch Availability(1)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
ubuntu	fetchmail (6.4.38-1ubuntu4.1) @ noble	2026-05-21	ubuntu

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-142

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

UbuntuUSN-7838-1MEDIUM
fetchmail vulnerability

Data Freshness Timeline

(refreshed 17× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-29 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-26 13:44 UTCepss_batch
2026-05-26 13:44 UTCepss_batch
2026-05-26 13:43 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-23 15:21 UTCepss_batch
2026-05-22 21:16 UTCepss_batch
2026-05-22 21:16 UTCepss_batch
2026-05-21 22:43 UTCepss_batch
2026-05-21 06:57 UTCEG score recompute
2026-05-21 06:57 UTCVendor advisory

Frequently asked(5)

What is CVE-2025-61962?

CVE-2025-61962 is a medium vulnerability published on October 4, 2025. In fetchmail before 6.5.6, the SMTP client can crash when authenticating upon receiving a 334 status code in a malformed context.

When was CVE-2025-61962 disclosed?

CVE-2025-61962 was first published in the National Vulnerability Database on October 4, 2025, with the most recent update on April 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2025-61962 actively exploited?

CVE-2025-61962 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 19.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2025-61962?

CVE-2025-61962 has a CVSS v3 base score of 5.9 (NVD).

How do I remediate CVE-2025-61962?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-61962, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2025-61962

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