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VulnerabilityPublished

CVE-2026-20578: MediaTek chipset · Algorithm Downgrade

Affects MediaTek chipsetSource CVE Database V5

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Not known to be exploited.

Data as of 2 Nov 2026, 02:58 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 – MT8883
23 affected builds
Fixed in–

AI-suggested

Users and administrators should monitor MediaTek advisories for official fixes corresponding to Patch ID MOLY01879164. Until a patch is confirmed, avoid connecting devices to untrusted or rogue base stations where possible.

Description

CVE-2026-20578 is a vulnerability in MediaTek chipsets involving a side channel information disclosure in the modem. This flaw could allow an attacker controlling a rogue base station to cause a remote denial of service on a user equipment (UE) device without requiring any additional privileges or user interaction. The issue is tracked under CWE-757 (Algorithm Downgrade).

References

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