Adjacent privilege escalation via WLAN heap overwrite
Published Feb 2, 2026 · Updated Feb 2, 2026
Heap-based buffer overflow in MediaTek chipset WLAN code allows remote attackers to escalate privileges without user interaction. The WLAN component performs an out-of-bounds heap write, but MediaTek has not disclosed the affected routine, input field, or copy operation. An attacker must be within wireless range; successful exploitation grants elevated execution without prior privileges or user action.
Summary
What happened
Heap-based buffer overflow in MediaTek chipset WLAN code allows remote attackers to escalate privileges without user interaction. The WLAN component performs an out-of-bounds heap write, but MediaTek has not disclosed the affected routine, input field, or copy operation. An attacker must be within wireless range; successful exploitation grants elevated execution without prior privileges or user action.
The record
- CVE
- CVE-2026-20408
- Published
- Feb 2, 2026
- Updated
- Feb 2, 2026
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-787, CWE-122, T1068
- Attack vector
- adjacent
- Privileges
- unauthenticated
Timeline
How it unfolded
- Feb 2, 2026CVE publishedPublication date reported by the CVE source.
- Feb 2, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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What conditions does exploitation require?
What is affected?
Affected products and versions are unavailable in this record.
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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