CVE-2026-20495

In Bluetooth driver, there is a possible permission bypass due to a missing permission check. This could lead to local escalation of privilege with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00488300; Issue ID: MSV-7296.

CVSS v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://www.mediatek.com/product-security-bulletin/August-2026	Vendor Advisory

Configurations

Configuration 1 (hide)

AND

cpe:2.3:o:mediatek:mt7925_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:mediatek:mt7925:-:*:*:*:*:*:*:*

Configuration 2 (hide)

AND

cpe:2.3:o:mediatek:mt7927_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:mediatek:mt7927:-:*:*:*:*:*:*:*

Configuration 3 (hide)

AND

cpe:2.3:o:mediatek:mt7902_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:mediatek:mt7902:-:*:*:*:*:*:*:*

Configuration 4 (hide)

AND

cpe:2.3:o:mediatek:mt7920_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:mediatek:mt7920:-:*:*:*:*:*:*:*

Configuration 5 (hide)

AND

cpe:2.3:o:mediatek:mt7921_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:mediatek:mt7921:-:*:*:*:*:*:*:*

Configuration 6 (hide)

AND

cpe:2.3:o:mediatek:mt7922_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:mediatek:mt7922:-:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-08-03 03:16

Updated : 2026-08-19 15:08

NVD link : CVE-2026-20495

Mitre link : CVE-2026-20495

CVE.ORG link : CVE-2026-20495

JSON object : View

Products Affected

mediatek

mt7925
mt7902
mt7922
mt7927_firmware
mt7902_firmware
mt7920_firmware
mt7920
mt7921
mt7921_firmware
mt7927
mt7922_firmware
mt7925_firmware

CWE

CWE-862

Missing Authorization

{"id": "CVE-2026-20495", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-20495", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-08-05T03:56:57.654341Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}]}, "affected": [{"source": "security@mediatek.com", "affectedData": [{"vendor": "MediaTek, Inc.", "product": "MediaTek chipset", "versions": [{"status": "affected", "version": "MT7902"}, {"status": "affected", "version": "MT7920"}, {"status": "affected", "version": "MT7921"}, {"status": "affected", "version": "MT7922"}, {"status": "affected", "version": "MT7925"}, {"status": "affected", "version": "MT7927"}], "defaultStatus": "unaffected"}]}], "published": "2026-08-03T03:16:44.663", "references": [{"url": "https://www.mediatek.com/product-security-bulletin/August-2026", "tags": ["Vendor Advisory"], "source": "security@mediatek.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security@mediatek.com", "description": [{"lang": "en", "value": "CWE-862"}]}], "descriptions": [{"lang": "en", "value": "In Bluetooth driver, there is a possible permission bypass due to a missing permission check. This could lead to local escalation of privilege with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00488300; Issue ID: MSV-7296."}], "lastModified": "2026-08-19T15:08:48.373", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:mediatek:mt7925_firmware:-:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "47E74656-3DD4-4A34-8E81-77CB5E4AB253"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:mediatek:mt7925:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "27CFC9DF-2F4C-469A-8A19-A260B1134CFE"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:mediatek:mt7927_firmware:-:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D8B57DE7-C20E-46DE-889A-41CC10059C72"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:mediatek:mt7927:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "05525018-AFE0-415C-A71C-A77922C7D637"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:mediatek:mt7902_firmware:-:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C88EAF30-A899-478B-BF4A-9DC61E1177B4"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:mediatek:mt7902:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "91DEA745-47A8-43F1-A1B2-F53F651A99EF"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:mediatek:mt7920_firmware:-:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "DB438952-6B4D-454A-AC2C-0FFA759FAAF1"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:mediatek:mt7920:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "140DAC08-96E9-47D3-BC2E-65E999DCFD50"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:mediatek:mt7921_firmware:-:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "FDF9ABD6-2AEF-43FF-A3B9-C4AF11E7C4CC"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:mediatek:mt7921:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "32AFEA0A-FFE2-4EA9-8B51-7E3E75DE65CC"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:mediatek:mt7922_firmware:-:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "FC8D3E58-DC77-4EF8-94F5-D7C12E4CE1C1"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:mediatek:mt7922:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "EA2A6813-7138-441E-A9E4-FF62FCBD797A"}], "operator": "OR"}], "operator": "AND"}], "sourceIdentifier": "security@mediatek.com"}