Read the docs
TI-2025-14709 Aliases CVE-2025-20637GHSA-qwc4-4mwx-cwrr

Improper check for unusual conditions in MediaTek MT7981, MT7986

Priority MEDIUM 40CWE-248Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
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-248.

Summary

In network HW, there is a possible system hang due to an uncaught exception. This could lead to remote denial of service with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00399035; Issue ID: MSV-2380.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00642 51st 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
Yes
Technical impact
Partial

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

Affected products

VendorProductAffected versionsFixed inStatusSource
MediaTekMT7981, MT7986SDK release 7.6.7.0 and before—No fix listedCNA
  • MT7981, MT7986 VendorMediaTek Affected SDK release 7.6.7.0 and before Fixed in — No fix listed CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:a:mediatek:software_development_kit:*:*:*:*:*:*:*:*up to 7.6.7.0VulnerableMediaTek
cpe:2.3:h:mediatek:mt7981:-:*:*:*:*:*:*:*not specified by NVDRunning onMediaTek
cpe:2.3:h:mediatek:mt7986:-:*:*:*:*:*:*:*not specified by NVDRunning onMediaTek
  • cpe:2.3:a:mediatek:software_development_kit:*:*:*:*:*:*:*:* Versions up to 7.6.7.0 Vulnerable ·MediaTek
  • cpe:2.3:h:mediatek:mt7981:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·MediaTek
  • cpe:2.3:h:mediatek:mt7986:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·MediaTek

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-20637
  2. 2026-10-03 Alias added: GHSA-qwc4-4mwx-cwrr
  3. 2026-10-21 EPSS moved to the 50th–90th percentile

References

Advisory 1

  • TI-2024-13053 Improper input validation in MediaTek MT6890, MT7915, MT7916, MT7981, MT7986 CVSS 3.1CRITICAL 9.8
  • TI-2025-14754 Out-of-bounds write in MediaTek MT7615, MT7622, MT7663 CVSS 3.1CRITICAL 9.8
  • TI-2025-14753 Out-of-bounds write in MediaTek MT6890, MT7615, MT7622, MT7663, MT7915, MT7916, MT7981… CVSS 3.1CRITICAL 9.8
  • TI-2025-14752 Out-of-bounds write in MediaTek MT6890, MT7615, MT7622, MT7663, MT7915, MT7916, MT7981… CVSS 3.1CRITICAL 9.8
  • TI-2025-14751 Out-of-bounds write in MediaTek MT6890, MT7615, MT7622, MT7663, MT7915 CVSS 3.1CRITICAL 9.8
  • TI-2025-14745 Incorrect authorization in MediaTek MT6890, MT6990, MT7915, MT7916, MT7981, MT7986… CVSS 3.1CRITICAL 9.8
See all 70 →

Sources

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