CVE-2025-8035
highpriority · track · 0EPSS 0.004 · 34 %ileDEEUNLRUUSEPSS · scored 2026-10-27
Memory safety bugs present in Firefox ESR 128.12, Thunderbird ESR 128.12, Firefox ESR 140.0, Thunderbird ESR 140.0, Firefox 140 and Thunderbird 140. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 141, Firefox ESR 128.13, Firefox ESR 140.1, Thunderbird 141, Thunderbird 128.13, and Thunderbird 140.1.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (56)
Products and version ranges known to be affected.
advisories (2)
Vendor and ecosystem advisories describing this.
- NCSC-2025-0235Kwetsbaarheden verholpen in Firefox en ThunderbirdNL2025-07-23csaf · ncsc_nlNL
Mozilla heeft kwetsbaarheden verholpen in Firefox en Thunderbird (Specifiek voor versies onder 141).
- WID-SEC-W-2025-1623Mozilla Firefox , Firefox ESR und Thunderbird: Mehrere SchwachstellenDeutsch2025-07-22csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Mozilla Firefox, Mozilla Firefox ESR und Mozilla Thunderbird ausnutzen, um beliebigen Programmcode auszuführen, einen Denial-of-Service-Zustand zu verursachen, vertrauliche Informationen offenzulegen, Sicherheitsmaßnahmen zu umgehen und andere, nicht näher definierte Angriffe durchzuführen.
also known as (10)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (27)
External citations — patches, advisories, analysis.
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=1975961%2C1975961%2C1975961cnnvd
- https://bugzilla.mozilla.org/show_bug.cgi?id=1975961cnnvd
- https://lists.debian.org/debian-lts-announce/2025/07/msg00016.htmlcnnvd
- https://nvd.nist.gov/vuln/detail/CVE-2025-8035cnnvd
- https://vigilance.fr/vulnerability/Mozilla-Firefox-Thunderbird-multiple-vulnerabilities-dated-22-07-2025-47779cnnvd
- https://www.firefox.com/zh-CN/?utm_campaign=SET_DEFAULT_BROWSERPatchcnnvd
- https://www.mozilla.org/security/advisories/mfsa2025-56/cnnvd
- https://www.mozilla.org/security/advisories/mfsa2025-58/cnnvd
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