CVE-2026-20495

Local privilege escalation via missing permission check

Published Aug 3, 2026 · Updated Aug 3, 2026

Missing authorization in the MediaTek Chipset Bluetooth driver allows local users to escalate privileges through a local driver interface. The driver performs an undisclosed privileged operation without the required permission check; MediaTek has not identified the affected interface or operation. Exploitation requires existing User execution privileges and no user interaction, and grants privileges beyond those assigned to that local user.

CVSS severity7.8
High
EPSS probability0.10%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in the MediaTek Chipset Bluetooth driver allows local users to escalate privileges through a local driver interface. The driver performs an undisclosed privileged operation without the required permission check; MediaTek has not identified the affected interface or operation. Exploitation requires existing User execution privileges and no user interaction, and grants privileges beyond those assigned to that local user.

The record

CVE
CVE-2026-20495
Published
Aug 3, 2026
Updated
Aug 3, 2026
Vendor
MediaTek
Product
MediaTek Chipset
Classifications
CWE-862, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=MT7902
  2. Affected versionversion=MT7920
  3. Affected versionversion=MT7921
  4. Affected versionversion=MT7922
  5. Affected versionversion=MT7925
  6. Affected versionversion=MT7927

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

MediaTek · MediaTek Chipsetversion=MT7902; version=MT7920; version=MT7921; version=MT7922; version=MT7925; version=MT7927

Published CVSS scores

7.8CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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