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CVE record · CVE-2026-20553

Out-of-bounds write in MediaTek, Inc. MediaTek chipset

CVSS 6.8 MediumEPSS 0.0019 · 8th percentile

Published by the CVE Program (CNA: MediaTek) at 2 Nov 2026, 02:33 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
VendorProductVersions
MediaTek, Inc. MediaTek chipset
  • affected MT2713
  • affected MT2718
  • affected MT2737
  • affected MT6781
  • affected MT6789
  • affected MT6813
  • affected MT6835
  • affected MT6855
  • affected MT6858
  • affected MT6878
  • affected MT6879
  • affected MT6880
  • and 19 more
Other versions: unaffected
Identifiers
CVE-2026-20553
CNA
MediaTek
Weakness (CWE)
CWE-787
Tags
Published
2 Nov 2026
Updated
2 Nov 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

ScoreRatingCVSSVectorSource
6.8 Medium 3.1 CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H ADP (CISA-ADP)
  • CISA KEV Not listed.
  • EPSS 0.0019, the 8th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 2 Nov 2026, 02:33 UTC Confirmed by the CVE List
  2. 2 Nov 2026, 02:43 UTC First seen by agentprime
  3. 2 Nov 2026, 03:17 UTC Confirmed by NVD

Sources

References from the CNA

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.