Authenticated device compromise via WANS stack overflow
Published Apr 10, 2026 · Updated Apr 10, 2026
Stack-based buffer overflow in Tenda AC9 15.03.02.13 allows remote authenticated users to compromise the router through a crafted POST request. The /goform/WizardHandle handler lets decodePwd process the attacker-controlled WANS argument beyond the bounds of a stack buffer. Low-privileged management access is required; successful exploitation can corrupt memory and take control of or crash the router.
Summary
What happened
Stack-based buffer overflow in Tenda AC9 15.03.02.13 allows remote authenticated users to compromise the router through a crafted POST request. The /goform/WizardHandle handler lets decodePwd process the attacker-controlled WANS argument beyond the bounds of a stack buffer. Low-privileged management access is required; successful exploitation can corrupt memory and take control of or crash the router.
The record
- CVE
- CVE-2026-6016
- Published
- Apr 10, 2026
- Updated
- Apr 10, 2026
- Vendor
- Shenzhen Tenda Technology Co., Ltd.
- Product
- AC9
- Classifications
- CWE-119, CWE-121
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Apr 10, 2026CVE publishedPublication date reported by the CVE source.
- Apr 10, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=15.03.02.13
What conditions does exploitation require?
What is affected?
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
- Tenda AC9 WizardHandle proof of conceptproof of concept · unverified
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Technologies
Your stack
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Your stack
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