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VulnerabilityPublished

CVE-2026-20566: MediaTek chipset · Out-of-bounds Write

Affects MediaTek chipsetSource CVE Database V5

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Not known to be exploited.

Data as of 2 Nov 2026, 02:59 UTC

Severity
High

Rated High by Threat Radar's AI analysis · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 2 Nov 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 1 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
MediaTek, Inc.MediaTek chipsetAffected
  • MT2716 – MT8791
41 affected builds
Fixed in–

AI-suggested

A patch is available from MediaTek identified by Patch ID MOLY01923663 / ALPS11315955. Applying this official fix will remediate the vulnerability. Users and device manufacturers should apply the patch to affected devices to mitigate the risk.

Description

CVE-2026-20566 is an out-of-bounds write vulnerability in MediaTek chipsets' modem component caused by a missing bounds check. Exploitation requires user interaction and a malicious actor with System privilege. Successful exploitation could lead to remote denial of service if a UE connects to a rogue base station controlled by the attacker. A patch is available identified by Patch ID MOLY01923663 / ALPS11315955.

References

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