TI-2026-83696 Aliases CVE-2026-20555 GHSA-v969-7g96-8fww

Out-of-bounds read in MediaTek modem allows remote denial of service

LOW 23CWE-125Published 2026-11-02 · Updated 2026-11-02

Key facts

Attack vector: Adjacent network
Privileges required: None
User interaction: None
Attack complexity: High
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-125 and the CVSS impact.

Summary

MediaTek chipsets including MT2716, MT6813, MT6815, MT6835, MT6858 and other models are affected. A missing bounds check in the modem lets it read memory out of bounds (CWE-125). An attacker running a rogue base station can cause remote denial of service when a UE connects to it, with no extra execution privileges and no user interaction needed.

Written with Claude Haiku 5.5 from the sources below · 2026-11-02

Description from the CNA

In Modem, there is a possible out of bounds read due to a missing bounds check. This could lead to remote denial of service, if a UE has connected to a rogue base station controlled by the attacker, with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: MOLY01876664; Issue ID: MSV-9834.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00207 10th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
MediaTek	MediaTek chipset	MT2716; MT6813; MT6815; MT6835; MT6858; MT6878; MT6881; MT6897; MT6899; MT6982; MT6986; MT6988; MT6991; MT6993; MT8668; MT8676; MT8678; MT8755; MT8775; MT8792; MT8793; MT8863; MT8873; MT8875; MT8883	—	No fix listed	CNA

MediaTek chipset VendorMediaTek Affected MT2716; MT6813; MT6815; MT6835; MT6858; MT6878; MT6881; MT6897; MT6899; MT6982; MT6986; MT6988; MT6991; MT6993; MT8668; MT8676; MT8678; MT8755; MT8775; MT8792; MT8793; MT8863; MT8873; MT8875; MT8883 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for MediaTek chipset.

Written with Claude Haiku 5.5 from the sources below · 2026-11-02

Timeline

2026-11-02 Threatist record created from CVE-2026-20555
2026-11-02 Alias added: GHSA-v969-7g96-8fww
2026-11-02 CVSS score added · CISA ADP
2026-11-02 CISA SSVC decision points changed

References

Other 1

https://www.mediatek.com/product-security-bulletin/November-2026

TI-2020-00067 Out-of-bounds write in Android KEVCVSS 3.1HIGH 7.8
TI-2024-13053 Improper input validation in MediaTek MT6890, MT7915, MT7916, MT7981, MT7986 CVSS 3.1CRITICAL 9.8
TI-2025-14725 Integer overflow in MediaTek MT6781, MT6789, MT6835, MT6855, MT6878, MT6879, MT6886… CVSS 3.1MEDIUM 6.5
TI-2024-13114 Memory corruption in MediaTek MT2735, MT2737, MT6833, MT6835, MT6835T, MT6853, MT6855… CVSS 3.1CRITICAL 9.8
TI-2022-14283 Command injection in MediaTek EN7528, EN7580 CVSS 3.1CRITICAL 9.8
TI-2021-11684 Command injection in MediaTek EN7528, EN7580 CVSS 3.1CRITICAL 9.8

See all 1133 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences