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The vulnerability in Mozilla Firefox and Firefox ESR browsers allows a hacker to execute arbitrary code.

🗓️ 11 Jun 2025 00:00:00Reported by FSTEC of Russia — Information Security Threat DatabaseType 
bdu_fstec
 bdu_fstec🔗 bdu.fstec.ru👁 18 Views

Firefox and Firefox ESR have a vulnerability that allows remote code execution via a buffer overrun.

Related
Detection
Refs
ReporterTitlePublishedViews
Family
Circl		CVE-2025-4921
17 May 202522:19
–circl
CVE		CVE-2025-4921
17 May 202521:07
–cve
Cvelist		CVE-2025-4921
17 May 202521:07
–cvelist
Debian		[SECURITY] [DSA 5922-1] firefox-esr security update
18 May 202510:25
–debian
Debian CVE		CVE-2025-4921
17 May 202521:07
–debiancve
Tenable Nessus		Debian dsa-5922 : firefox-esr - security update
18 May 202500:00
–nessus
EUVD		EUVD-2025-15600
3 Oct 202520:07
–euvd
NVD		CVE-2025-4921
17 May 202522:15
–nvd
OpenVAS		Debian: Security Advisory (DSA-5922-1)
19 May 202500:00
–openvas
OSV		OPENSUSE-SU-2025:15172-1 libmozjs-128-0-128.10.1-1.1 on GA media
27 May 202500:00
–osv
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Vulners
Node
mozillafirefoxRange<138.0.4
OR
mozillafirefox_esrRange<128.10.1
OR
mozillafirefox_esrRange<115.23.1
SourceLink
cybersecurity-helpwww.cybersecurity-help.cz/vdb/SB2025051812
mozillawww.mozilla.org/en-US/security/advisories/mfsa2025-38/
mozillawww.mozilla.org/en-US/security/advisories/mfsa2025-37/
mozillawww.mozilla.org/en-US/security/advisories/mfsa2025-36/
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/2.13/
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/
webwww.web.nvd.nist.gov/view/vuln/detail
mozillawww.mozilla.org/security/advisories/mfsa2025-36.html
mozillawww.mozilla.org/security/advisories/mfsa2025-37.html
mozillawww.mozilla.org/security/advisories/mfsa2025-38.html
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04 Mar 2026 00:00Current
6.1Medium risk
Vulners AI Score6.1
CVSS 38.8
CVSS 210
FirefoxBuffer overrunRemote code executionMemory vulnerability
18