Unauthenticated code execution via unchecked Index parameter
Published Oct 3, 2023 · Updated Jun 17, 2025
Buffer overflow in the WifiWpsOOB handler in Tenda AC6 15.03.05.19 allows remote attackers to execute arbitrary code via crafted HTTP requests. The handler copies the Index parameter into a fixed-size buffer without validating its length, so an oversized value overwrites adjacent memory. Network access to the router's HTTP management service is sufficient, with no authentication or user interaction required; exploitation can compromise the device or interrupt service.
Summary
What happened
Buffer overflow in the WifiWpsOOB handler in Tenda AC6 15.03.05.19 allows remote attackers to execute arbitrary code via crafted HTTP requests. The handler copies the Index parameter into a fixed-size buffer without validating its length, so an oversized value overwrites adjacent memory. Network access to the router's HTTP management service is sufficient, with no authentication or user interaction required; exploitation can compromise the device or interrupt service.
The record
- CVE
- CVE-2023-40830
- Published
- Oct 3, 2023
- Updated
- Jun 17, 2025
- Vendor
- Shenzhen Tenda Technology Co., Ltd.
- Product
- AC6
- Classifications
- CWE-120, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Oct 3, 2023CVE publishedPublication date reported by the CVE source.
- Jun 17, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=15.03.05.19
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
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Technologies
Your stack
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Your stack
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