Buffer overflow in MediaTek chipset
Priority LOW 31CWE-120Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- High
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-120 and the CVSS impact.
Summary
In wlan STA driver, there is a possible escalation of privilege due to a missing bounds check. This could lead to local escalation of privilege if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: WCNCR00473802; Issue ID: MSV-5970.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00144 3rd 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
- Total
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 | MT7902; MT7920; MT7921; MT7922; MT7925; MT7927; MT8696 | — | No fix listed | CNA |
- MediaTek chipset VendorMediaTek Affected MT7902; MT7920; MT7921; MT7922; MT7925; MT7927; MT8696 Fixed in — No fix listed CNA
CPE configurations NVD · 8
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:mediatek:nbiot_sdk:*:*:*:*:*:*:*:* | up to 3.8 | 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:h:mediatek:mt8696:-:*:*:*:*:*:*:* | not specified by NVD | Running on | MediaTek |
- cpe:2.3:a:mediatek:nbiot_sdk:*:*:*:*:*:*:*:* Versions up to 3.8 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
- cpe:2.3:h:mediatek:mt8696:-:*:*:*:*:*:*:* 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-2026-20436
- 2026-10-03 Alias added: GHSA-8vhj-xqq3-893m
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-2026-16562 Improper check for unusual conditions in MediaTek chipset CVSS 3.1MEDIUM 6.5
- TI-2025-14757 Out-of-bounds read in MediaTek MT7902, MT7920, MT7921, MT7922, MT7925, MT7927 CVSS 3.1MEDIUM 5.5
Sources
- CVE-2026-20436 · CVE Program
- CVE-2026-20436 · NVD
- FIRST EPSS
- GHSA-8vhj-xqq3-893m · GitHub Advisory Database · CC BY 4.0
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