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{"cveTags": [], "descriptions": [{"lang": "en", "value": "Incorrect boundary conditions in the DOM: Device Interfaces component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10."}], "id": "CVE-2026-6764", "lastModified": "2026-04-22T00:16:32.593", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 2.5, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}, "published": "2026-04-21T13:16:22.313", "references": [{"source": "security@mozilla.org", "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=2022162"}, {"source": "security@mozilla.org", "url": "https://www.mozilla.org/security/advisories/mfsa2026-30/"}, {"source": "security@mozilla.org", "url": "https://www.mozilla.org/security/advisories/mfsa2026-32/"}, {"source": "security@mozilla.org", "url": "https://www.mozilla.org/security/advisories/mfsa2026-33/"}, {"source": "security@mozilla.org", "url": "https://www.mozilla.org/security/advisories/mfsa2026-34/"}], "sourceIdentifier": "security@mozilla.org", "vulnStatus": "Undergoing Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-119"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[140.10,141.0.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[150,*]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Firefox", "source": "cna", "vendor": "Mozilla"}, "product": "firefox", "vendor": "mozilla"}], "analysis": {"en": {"generated_at": "2026-04-22T05:45:45.299316+00:00", "value": {"mitigation_remediation": ["Upgrade to Firefox 150 or newer, or to Firefox ESR 140.10 or newer, and to Thunderbird 150 or newer, or to Thunderbird ESR 140.10 or newer.", "If an upgrade cannot be performed immediately, block or disable the Device Interfaces feature via browser settings or a dedicated extension that limits device access.", "Enable automatic updates to ensure that subsequent security fixes are installed without delay."], "summary": {"action": "Patch", "impact": "Memory Corruption"}, "threat_synthesis": {"affected_systems": "Mozilla Firefox and Thunderbird versions earlier than 150, as well as the ESR 140.10 line, are affected. Users should verify that their installations are not older than these patched releases.", "description_and_impact": "This vulnerability arises from incorrect boundary checks within the Device Interfaces component of Firefox\u2019s DOM implementation. The flaw can lead to memory corruption when an attacker provides crafted data that manipulates device interfaces. While the CVE description does not explicitly state the exploitation outcome, such memory corruption could, in principle, result in loss of confidentiality, integrity, or availability.", "risk_and_exploitability": "The CVSS score of 6.5 indicates a medium severity, but the EPSS score is not available, so the likelihood of exploitation cannot be quantified. The vulnerability is not listed in the CISA KEV catalog. The lack of a published EPSS value means the risk cannot be precisely measured; however the documented memory corruption potential and medium severity suggest a noteworthy concern. The attack vector is likely local or remote via crafted DOM manipulation, although the exact method is not detailed in the vendor advisory."}}}}, "created": "2026-04-21T17:15:25.103708+00:00", "updated": "2026-04-22T06:00:09.648719+00:00", "vendors": ["mozilla", "mozilla$PRODUCT$firefox"], "weaknesses": ["CWE-119"]}