Authenticated code execution via oversized PPW parameter
Published Mar 27, 2026 · Updated Mar 27, 2026
Stack-based buffer overflow in Tenda AC5 firmware 15.03.06.47 allows remote authenticated users to execute arbitrary code via a POST request. The /goform/WizardHandle handler passes attacker-controlled PPW data to decodePwd, which writes beyond the fixed-size decode_pwd stack array. Low-privileged access to the router's web management interface is required, and exploitation can fully compromise the device.
Summary
What happened
Stack-based buffer overflow in Tenda AC5 firmware 15.03.06.47 allows remote authenticated users to execute arbitrary code via a POST request. The /goform/WizardHandle handler passes attacker-controlled PPW data to decodePwd, which writes beyond the fixed-size decode_pwd stack array. Low-privileged access to the router's web management interface is required, and exploitation can fully compromise the device.
The record
- CVE
- CVE-2026-4906
- Published
- Mar 27, 2026
- Updated
- Mar 27, 2026
- Vendor
- Shenzhen Tenda Technology Co., Ltd.
- Product
- AC5 Firmware
- Classifications
- CWE-119, CWE-121, CWE-787, T1210
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Mar 27, 2026CVE publishedPublication date reported by the CVE source.
- Mar 27, 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=15.03.06.47
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_AC5_WizardHandle_PPW proof of conceptproof of concept · unverified
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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