CVE-2026-20563: MediaTek chipset · Out-of-bounds Write
Affects MediaTek chipsetSource CVE Database V5
Not known to be exploited.
Data as of 2 Nov 2026, 03:02 UTC
Rated High by Threat Radar's AI analysis · No CVSS score from NVD or the CNA
Thin evidence
One scorer or noneExploitation evidence
Disclosed: evidence found.
CVE published 2 Nov 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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
| Product | Affected | Fixed in |
|---|---|---|
| MediaTek, Inc.MediaTek chipset | Affected
| Fixed in– |
AI-suggested
Patch ID MOLY01777997 is referenced, indicating a fix likely exists or is planned. Users and vendors should verify with MediaTek for the availability of official patches or updates addressing this issue. Until patched, avoid connecting to untrusted or rogue base stations.
Description
CVE-2026-20563 is an out-of-bounds write vulnerability in MediaTek chipsets' modem component caused by an incorrect bounds check. Exploitation can lead to a remote denial of service when a user equipment (UE) connects to a rogue base station controlled by an attacker. No additional execution privileges or user interaction are required for exploitation.