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The vulnerability of the Mozilla Firefox browser and the Thunderbird email client relates to reading data beyond the buffer in memory, allowing an attacker to execute arbitrary code.

🗓️ 05 Mar 2025 00:00:00Reported by FSTEC of Russia — Information Security Threat DatabaseType 
bdu_fstec
 bdu_fstec🔗 bdu.fstec.ru👁 5 Views

Firefox and Thunderbird vulnerability reads beyond memory, enabling remote code execution.

Related
Detection
Refs
ReporterTitlePublishedViews
Family
AlpineLinux		CVE-2025-1020
4 Feb 202514:15
–alpinelinux
AstraLinux		Astra Linux – Vulnerability in Firefox
11 Feb 202507:35
–astralinux
Chainguard		CVE-2025-1020 vulnerabilities
4 Feb 202514:15
–cgr
Circl		CVE-2025-1020
4 Feb 202514:16
–circl
CNNVD		Mozilla Firefox 安全漏洞
4 Feb 202500:00
–cnnvd
CNVD		Mozilla Firefox Memory Corruption Vulnerability (CNVD-2025-03275)
10 Feb 202500:00
–cnvd
CVE		CVE-2025-1020
4 Feb 202513:58
–cve
Cvelist		CVE-2025-1020 Memory safety bugs fixed in Firefox 135 and Thunderbird 135
4 Feb 202513:58
–cvelist
Debian CVE		CVE-2025-1020
4 Feb 202513:58
–debiancve
EUVD		EUVD-2025-1975
3 Oct 202520:07
–euvd
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SourceLink
mozillawww.mozilla.org/security/advisories/mfsa2025-07/
mozillawww.mozilla.org/security/advisories/mfsa2025-11/
accesswww.access.redhat.com/security/cve/cve-2025-1020
ubuntuwww.ubuntu.com/security/CVE-2025-1020
wikiwww.wiki.astralinux.ru/astra-linux-se17-bulletin-2025-0923SE17
altspwww.altsp.su/obnovleniya-bezopasnosti/
xn--80ahaefyxhnwww.xn--80ahaefyxhn.xn--j1afgaq.xn--p1ai/bin/view/%D0%9E%D0%A1%D0%BD%D0%BE%D0%B2%D0%B0/%D0%9E%D0%B1%D0%BD%D0%BE%D0%B2%D0%BB%D0%B5%D0%BD%D0%B8%D1%8F/2.14/
wikiwww.wiki.astralinux.ru/astra-linux-se47-bulletin-2025-1020SE47
wikiwww.wiki.astralinux.ru/astra-linux-se16-bulletin-20251225SE16
xn--80ahaefyxhnwww.xn--80ahaefyxhn.xn--j1afgaq.xn--p1ai/bin/view/%D0%9E%D0%A1%D0%BD%D0%BE%D0%B2%D0%B0/%D0%9E%D0%B1%D0%BD%D0%BE%D0%B2%D0%BB%D0%B5%D0%BD%D0%B8%D1%8F/3.1/
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04 Mar 2026 00:00Current
8.3High risk
Vulners AI Score8.3
CVSS 39.8
CVSS 210
EPSS0.00524
mozilla firefoxthunderbirdbuffer overreadmemory safetyremote code execution
5