CVE-2025-10537

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{"affected": [{"affectedData": [{"product": "Firefox", "vendor": "Mozilla", "versions": [{"lessThanOrEqual": "140.*", "status": "unaffected", "version": "140.3", "versionType": "rpm"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "143", "versionType": "rpm"}]}, {"product": "Thunderbird", "vendor": "Mozilla", "versions": [{"lessThanOrEqual": "140.*", "status": "unaffected", "version": "140.3", "versionType": "rpm"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "143", "versionType": "rpm"}]}], "source": "security@mozilla.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*", "matchCriteriaId": "277CA9C0-BD77-46D8-8191-F54598F7F47B", "versionEndExcluding": "140.3.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*", "matchCriteriaId": "6071B71C-B967-45B9-8CA4-1CB0A9E24D1A", "versionEndExcluding": "143.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:mozilla:thunderbird:*:*:*:*:esr:*:*:*", "matchCriteriaId": "8051598A-A334-4C40-A27F-D8A8C104BCDC", "versionEndExcluding": "140.3.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*", "matchCriteriaId": "38BD0000-9FB7-4D1B-A8D1-C23F9E325D28", "versionEndExcluding": "143.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Memory safety bugs present in Firefox ESR 140.2, Thunderbird ESR 140.2, Firefox 142 and Thunderbird 142. 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 143, Firefox ESR 140.3, Thunderbird 143, and Thunderbird 140.3."}, {"lang": "es", "value": "Errores de seguridad de memoria presentes en Firefox ESR 140.2, Thunderbird ESR 140.2, Firefox 142 y Thunderbird 142. Algunos de estos errores mostraron evidencia de corrupci\u00f3n de memoria y presumimos que con suficiente esfuerzo algunos de estos podr\u00edan haber sido explotados para ejecutar c\u00f3digo arbitrario. Esta vulnerabilidad afecta a Firefox < 143, Firefox ESR anterior a 140.3, Thunderbird < 143 y Thunderbird anterior a 140.3."}], "id": "CVE-2025-10537", "lastModified": "2026-10-23T22:10:00.160", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-10537", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2025-09-17T03:55:49.986935Z", "version": "2.0.3"}}]}, "published": "2025-09-16T13:15:49.433", "references": [{"source": "security@mozilla.org", "tags": ["Issue Tracking"], "url": "https://bugzilla.mozilla.org/buglist.cgi?bug_id=1938220%2C1980730%2C1981280%2C1981283%2C1984505%2C1985067"}, {"source": "security@mozilla.org", "tags": ["Vendor Advisory"], "url": "https://www.mozilla.org/security/advisories/mfsa2025-73/"}, {"source": "security@mozilla.org", "tags": ["Vendor Advisory"], "url": "https://www.mozilla.org/security/advisories/mfsa2025-75/"}, {"source": "security@mozilla.org", "tags": ["Vendor Advisory"], "url": "https://www.mozilla.org/security/advisories/mfsa2025-77/"}, {"source": "security@mozilla.org", "tags": ["Vendor Advisory"], "url": "https://www.mozilla.org/security/advisories/mfsa2025-78/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2025/09/msg00020.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2025/09/msg00026.html"}], "sourceIdentifier": "security@mozilla.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-119"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"affected_release": [{"advisory": "RHSA-2025:16109", "cpe": "cpe:/o:redhat:enterprise_linux:10.0", "package": "firefox-0:140.3.0-1.el10_0", "product_name": "Red Hat Enterprise Linux 10", "release_date": "2025-09-17T00:00:00Z"}, {"advisory": "RHSA-2025:16108", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "firefox-0:140.3.0-1.el9_6", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2025-09-17T00:00:00Z"}], "bugzilla": {"description": "firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.3, Thunderbird ESR 140.3, Firefox 143 and Thunderbird 143", "id": "2395759", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2395759"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H", "status": "verified"}, "details": ["No description is available for this CVE."], "name": "CVE-2025-10537", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "rhel10/firefox-flatpak", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "rhel10/thunderbird-flatpak", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-09-16T12:26:37Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-10537\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-10537\nhttps://www.mozilla.org/security/advisories/mfsa2025-75/#CVE-2025-10537\nhttps://www.mozilla.org/security/advisories/mfsa2025-78/#CVE-2025-10537"], "statement": "Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory.", "threat_severity": "Important"}

{"analysis": {"en": {"generated_at": "2026-04-20T19:33:39.720054+00:00", "value": {"mitigation_remediation": ["Update Mozilla Firefox to at least version 143 or ESR 140.3, and upgrade Mozilla Thunderbird to at least version 143 or ESR 140.3 on all hosts that use these browsers.", "Configure the browsers to run in a sandboxed process model and disable or restrict extensions, plug\u2011ins, and other add\u2011ons that can inject arbitrary code, thereby reducing the attack surface.", "Apply all relevant operating\u2011system security patches\u2014 for example, install the latest Red Hat Enterprise Linux 9 or 10 updates\u2014and consider enforcing mandatory access control policies such as SELinux in enforcing mode to limit the impact of a memory corruption flaw.", "Monitor logs and network traffic for indications of malicious content that might trigger a memory corruption, and set up alerts to detect potential exploitation attempts."], "summary": {"action": "Immediate Patch", "impact": "Remote code execution potential through memory corruption"}, "threat_synthesis": {"affected_systems": "All systems running the affected versions of Mozilla Firefox and Thunderbird\u2014 including the ESR 140.2 family and the mainstream 142 releases\u2014 are potentially impacted. Red Hat Enterprise Linux 9 and 10 are listed as platforms that may run these browsers, but the core issue resides in the browser software itself. The fixes are delivered in Firefox 143 and ESR 140.3, as well as Thunderbird 143 and ESR 140.3.", "description_and_impact": "The vulnerability involves memory safety bugs in Mozilla Firefox ESR 140.2, Firefox 142, Thunderbird ESR 140.2, and Thunderbird 142 that can corrupt memory boundaries. When exploited, these bugs could allow an attacker to execute arbitrary code, compromising confidentiality, integrity, and availability of the affected system. The weakness is identified as a bounds\u2011checking failure.", "risk_and_exploitability": "The CVSS score of 8.8 classifies this as a high\u2011severity flaw, while the EPSS score of less than 1% suggests a low but non\u2011zero probability of exploitation at this time. The vulnerability is not listed in CISA\u2019s KEV catalog. Although the attack vector is not explicitly defined in the description, it is inferred that an attacker would need to supply crafted content or exploit a browser feature that triggers the memory corruption, potentially through local or remote means. The available data do not indicate a publicly available exploit, but the high severity warrants prompt mitigation."}}}}, "created": "2025-09-17T10:04:55.463380+00:00", "updated": "2026-04-20T19:45:15.503356+00:00", "vendors": ["mozilla", "mozilla$PRODUCT$firefox", "mozilla$PRODUCT$firefox_esr", "mozilla$PRODUCT$thunderbird"]}