CVE-2025-0241

HIGHNVD 7.77.7—

7.7

When segmenting specially crafted text, segmentation would corrupt memory leading to a potentially exploitable crash. This vulnerability was fixed in Firefox 134, Firefox ESR 128.6, Thunderbird 134, and Thunderbird 128.6.

CVSS v3: 7.7
EG Score: 7.7(medium)
EPSS: 27.3%
KEV: Not listed

Published

January 7, 2025

Last Modified

April 13, 2026

References (6)

security@mozillahttps://bugzilla.mozilla.org/show_bug.cgi?id=1933023
security@mozillahttps://www.mozilla.org/security/advisories/mfsa2025-01/
security@mozillahttps://www.mozilla.org/security/advisories/mfsa2025-02/
security@mozillahttps://www.mozilla.org/security/advisories/mfsa2025-04/
security@mozillahttps://www.mozilla.org/security/advisories/mfsa2025-05/
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2025/01/msg00004.html

Patch Availability(21)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
ubuntu	firefox-mozsymbols (134.0+build1-0ubuntu0.20.04.1) @ focal	2026-05-21	ubuntu
ubuntu	xul-ext-lightning (1:140.7.1+build1-0ubuntu0.22.04.1) @ jammy	2026-05-21	ubuntu
redhat	thunderbird-0:128.6.0-3.el8_2	2025-01-13	redhat
redhat	thunderbird-0:128.6.0-3.el8_4	2025-01-13	redhat
redhat	thunderbird-0:128.6.0-3.el8_6	2025-01-13	redhat
redhat	thunderbird-0:128.6.0-3.el8_10	2025-01-13	redhat
redhat	thunderbird-0:128.6.0-3.el8_8	2025-01-13	redhat
redhat	firefox-0:128.6.0-1.el8_2	2025-01-09	redhat
redhat	thunderbird-0:128.6.0-3.el9_0	2025-01-09	redhat
redhat	firefox-0:128.6.0-1.el9_2	2025-01-09	redhat
redhat	thunderbird-0:128.6.0-3.el9_2	2025-01-09	redhat
redhat	firefox-0:128.6.0-1.el7_9	2025-01-09	redhat
redhat	firefox-0:128.6.0-1.el9_0	2025-01-09	redhat
redhat	firefox-0:128.6.0-1.el8_6	2025-01-09	redhat
redhat	firefox-0:128.6.0-1.el8_8	2025-01-09	redhat
redhat	firefox-0:128.6.0-1.el8_10	2025-01-09	redhat
redhat	firefox-0:128.6.0-1.el8_4	2025-01-09	redhat
redhat	thunderbird-0:128.6.0-3.el9_5	2025-01-09	redhat
redhat	firefox-0:128.6.0-1.el9_4	2025-01-09	redhat
redhat	thunderbird-0:128.6.0-3.el9_4	2025-01-09	redhat
redhat	firefox-0:128.6.0-1.el9_5	2025-01-08	redhat

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-401Missing Release of Memory after Effective Lifetime (Memory Leak)

All Vendor Advisories

(21)

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.

Data Freshness Timeline

(refreshed 13× 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.

2026-06-05 06:10 UTCepss_batch
2026-06-05 06:09 UTCepss_batch
2026-06-04 13:11 UTCepss_batch
2026-06-04 13:11 UTCepss_batch
2026-06-04 00:39 UTCOSV refresh
2026-06-02 20:12 UTCepss_batch
2026-06-02 20:12 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-29 13:43 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

Frequently asked(5)

What is CVE-2025-0241?

CVE-2025-0241 is a high vulnerability published on January 7, 2025. When segmenting specially crafted text, segmentation would corrupt memory leading to a potentially exploitable crash. This vulnerability was fixed in Firefox 134, Firefox ESR 128.6, Thunderbird 134, and Thunderbird 128.6.

When was CVE-2025-0241 disclosed?

CVE-2025-0241 was first published in the National Vulnerability Database on January 7, 2025, with the most recent update on April 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2025-0241 actively exploited?

CVE-2025-0241 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 27.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2025-0241?

CVE-2025-0241 has a CVSS v3 base score of 7.7 (NVD).

How do I remediate CVE-2025-0241?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-0241, 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-2025-0241

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Is Your Infrastructure Affected by CVE-2025-0241?

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CVE-2025-0241

Published

Last Modified

References (6)

Patch Availability(21)

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2025-0241?

Same vendor

Same CWE

CVE-2025-0241

📅 Published

🔄 Last Modified

🔗 References (6)

Patch Availability(21)

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2025-0241?

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References (6)

Frequently asked(5)

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