Mozilla Patches Firefox, Thunderbird Code Execution Flaws
Mozilla fixed multiple vulnerabilities in Firefox and Thunderbird, including memory safety bugs that could allow arbitrary code execution.
Sourcecisecurity.org — open the original
What to check
- Applies to
- The 3 CVEs named below. Whether you run an affected version is not assessed: check the versions the source lists.
- Exploitation
- No exploitation in the wild and no public exploit is recorded for the CVEs named.
Mozilla has disclosed and patched several vulnerabilities affecting Firefox and Thunderbird, the most severe of which could enable arbitrary code execution if exploited. The flaws include a denial-of-service issue triggered via a malicious LDAP address-book server, a chat UI manipulation vulnerability through injection, and memory safety bugs resolved in Firefox 152.0.4. Successful exploitation could allow an attacker to install programs, manipulate or delete data, or create new accounts with full user rights, with impact scaled by the privilege level of the affected user account.
No evidence of in-the-wild exploitation has been reported at this time. Affected versions include Firefox prior to 152.0.4, Thunderbird prior to 152.0.1, and Thunderbird prior to 140.12.1. MS-ISAC recommends prompt patching, least-privilege configurations, exploit protection features, and web/email content restrictions to mitigate risk pending update deployment.
Mentioned in this report
Source reporting: https://www.cisecurity.org/advisory/multiple-vulnerabilities-in-mozilla-products-could-allow-for-arbitrary-code-execution_2026-065
Free public brief. Slack alerts on the vendors you run come with the paid plans, and a new account gets three days of them, no card.
What this brief leaves out
This page is the free tier: the write-up, the severity, the names. In the app the same report carries live profiles of the CVEs it names. The paid plans add the security research and news reporting the free tier leaves out.
It sits in a corpus of 16,433 reports from 149 sources, 661 of them written in the last seven days, and it grows through the day.
A new account starts with three days of all of it, no card, then keeps the government and CERT reporting free. Slack alerts are a paid-plan feature: name the vendors you run and Slack hears about the reports that touch them, not the rest of the week's. Nothing is charged unless you subscribe.
Create a free account What it costs