CVE-2025-20718

HIGH
7.8
CVSS Score
Published: October 14, 2025 at 09:11 AM UTC
Updated: October 8, 2026 at 12:10 PM UTC
3 products affected across 3 vendorsOpenWRTSoftware Development KitMT6890, MT7615, MT7622, MT7663, MT7915, MT7916, MT7981, MT7986· also runs on 8 platforms

Using MT6890, MT7615, MT7622, MT7663, MT7915, MT7916, MT7981, MT7986 by MediaTek, Inc.?

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Severity
HIGH7.8
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

In wlan AP driver, there is a possible out of bounds write due to an incorrect bounds check. This could lead to local escalation of privilege with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00419945; Issue ID: MSV-3581.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v ≤ 7.6.7.2*
mediatek-mt6890 (environment) · mediatek-mt7615 (environment) · mediatek-mt7622 (environment) · mediatek-mt7663 (environment) · mediatek-mt7915 (environment) · mediatek-mt7916 (environment) · mediatek-mt7981 (environment) · mediatek-mt7986 (environment)
mediatek-mt6890 (environment) · mediatek-mt7615 (environment) · mediatek-mt7622 (environment) · mediatek-mt7663 (environment) · mediatek-mt7915 (environment) · mediatek-mt7916 (environment) · mediatek-mt7981 (environment) · mediatek-mt7986 (environment)
SDK release 7.6.7.2 and before / openWRT 19.07, 21.02

Runs on — not affected

The affected product only carries this flaw when running on these platforms. The platforms themselves are not vulnerable.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (1)

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.8HIGHCISA-ADP
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-121CWE-787

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