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Review reviewHigh

CVE-2026-20483

MediaTek, Inc. MediaTek chipset

In Telephony, there is a possible escalation of privilege due to a missing permission check. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS11087526; Issue ID: MSV-8243.

CVSS
7.7
EPSS
-
- percentile
CISA KEV
Not listed
Published
2026.08.03
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability-
Technical severityCVSS 7.7

Vulnerability overview

In Telephony, there is a possible escalation of privilege due to a missing permission check. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS11087526; Issue ID: MSV-8243.

Affected product and versions

Product
MediaTek, Inc. MediaTek chipset
Affected versions
>= MT6739, >= MT6761, >= MT6765, >= MT6768, >= MT6781, >= MT6789, >= MT6833, >= MT6835, >= MT6853, >= MT6855, >= MT6877, >= MT6878, >= MT6879, >= MT6883, >= MT6885, >= MT6886, >= MT6889, >= MT6893, >= MT6895, >= MT6897
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that MediaTek, Inc. MediaTek chipset and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CWE
CWE-862