Out-of-bounds read in MediaTek MT7902, MT7920, MT7921, MT7922, MT7925, MT7927
Priority LOW 24CWE-125Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- 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-125 and the CVSS impact.
Summary
In Bluetooth driver, there is a possible out of bounds read due to an incorrect bounds check. This could lead to local denial of service with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00418045; Issue ID: MSV-3481.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00174 6th 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 | MT7902, MT7920, MT7921, MT7922, MT7925, MT7927 | NB SDK release 3.6 and before | — | No fix listed | CNA |
- MT7902, MT7920, MT7921, MT7922, MT7925, MT7927 VendorMediaTek Affected NB SDK release 3.6 and before Fixed in — No fix listed CNA
CPE configurations NVD · 7
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:mediatek:nbiot_sdk:*:*:*:*:*:*:*:* | up to 3.6 | Vulnerable | MediaTek |
| cpe:2.3:h:mediatek:mt7902:-:*:*:*:*:*:*:* | not specified by NVD | Running on | MediaTek |
| cpe:2.3:h:mediatek:mt7920:-:*:*:*:*:*:*:* | not specified by NVD | Running on | MediaTek |
| cpe:2.3:h:mediatek:mt7921:-:*:*:*:*:*:*:* | not specified by NVD | Running on | MediaTek |
| cpe:2.3:h:mediatek:mt7922:-:*:*:*:*:*:*:* | not specified by NVD | Running on | MediaTek |
| cpe:2.3:h:mediatek:mt7925:-:*:*:*:*:*:*:* | not specified by NVD | Running on | MediaTek |
| cpe:2.3:h:mediatek:mt7927:-:*:*:*:*:*:*:* | not specified by NVD | Running on | MediaTek |
- cpe:2.3:a:mediatek:nbiot_sdk:*:*:*:*:*:*:*:* Versions up to 3.6 Vulnerable ·MediaTek
- cpe:2.3:h:mediatek:mt7902:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·MediaTek
- cpe:2.3:h:mediatek:mt7920:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·MediaTek
- cpe:2.3:h:mediatek:mt7921:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·MediaTek
- cpe:2.3:h:mediatek:mt7922:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·MediaTek
- cpe:2.3:h:mediatek:mt7925:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·MediaTek
- cpe:2.3:h:mediatek:mt7927:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·MediaTek
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2025-20687
- 2026-10-03 Alias added: GHSA-3j66-pf2w-87jq
References
More MediaTek Nbiot Sdk vulnerabilities
- TI-2022-09785 Use of uninitialized resource in MediaTek MT2621, MT2625 CVSS 3.1CRITICAL 9.8
- TI-2025-14750 Heap-based buffer overflow in MediaTek MT7902, MT7920, MT7921, MT7922, MT7925, MT7927 CVSS 3.1CRITICAL 9.8
- TI-2026-16550 Out-of-bounds write in MediaTek chipset CVSS 3.1CRITICAL 9.3
- TI-2026-16566 Out-of-bounds write in MediaTek chipset CVSS 3.1HIGH 7.8
- TI-2026-16579 Buffer overflow in MediaTek chipset CVSS 3.1MEDIUM 6.7
- TI-2026-16562 Improper check for unusual conditions in MediaTek chipset CVSS 3.1MEDIUM 6.5
Sources
- CVE-2025-20687 · CVE Program
- CVE-2025-20687 · NVD
- FIRST EPSS
- GHSA-3j66-pf2w-87jq · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences