CVE-2025-0241

7.7 HIGH 0.7% exploit odds Fix listed Denial of service Browser & mail

What it is

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.

At a glance

Exploitability: Can be exploited over the network without logging in. High risk of data exposure, data tampering.
Exploit odds: 0.7% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2025-01-07 16:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-10-05 15:10 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 0.7% in the next 30 days (EPSS).
Severity: 7.7 HIGH (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2025-01-07 16:15 UTC
Last modified: 2026-10-05 15:10 UTC
Exploit probability: 0.7% · EPSS, next 30 days
Weakness: CWE-401
Record status: Modified

Affected

Mozilla Firefox < 128.6.0
Mozilla Firefox < 134.0
Mozilla Thunderbird < 128.6.0
Mozilla Thunderbird < 134.0

Attack profile CVSS 3.1 · 7.7

Attack vector: Network
Complexity: High
Privileges needed: None
User interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: High
Availability: Low

Raw vector

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

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2025-0241.md and follow it. Check whether this project is affected by CVE-2025-0241. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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Fix and advisories

References

NVD record · CVE.org record