Authenticated code execution via unbounded password retrieval
Published Apr 5, 2026 · Updated Apr 5, 2026
Stack-based buffer overflow in Tenda AC10 16.03.10.10_multi_TDE01 allows remote authenticated users to execute code through its web interface. Within /bin/httpd, fromSysToolChangePwd passes the NVRAM sys.userpass value to GetValue with a 36-byte stack buffer and no length check, overwriting the saved return address at about 48 bytes. Exploitation requires an oversized password to be stored through another vector before the function runs, so the flaw supports chained code execution rather than a direct single-request attack.
Summary
What happened
Stack-based buffer overflow in Tenda AC10 16.03.10.10_multi_TDE01 allows remote authenticated users to execute code through its web interface. Within /bin/httpd, fromSysToolChangePwd passes the NVRAM sys.userpass value to GetValue with a 36-byte stack buffer and no length check, overwriting the saved return address at about 48 bytes. Exploitation requires an oversized password to be stored through another vector before the function runs, so the flaw supports chained code execution rather than a direct single-request attack.
The record
- CVE
- CVE-2026-5548
- Published
- Apr 5, 2026
- Updated
- Apr 5, 2026
- Vendor
- Shenzhen Tenda Technology Co., Ltd.
- Product
- AC10
- Classifications
- CWE-119, CWE-121, T1210
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Apr 5, 2026CVE publishedPublication date reported by the CVE source.
- Apr 5, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=16.03.10.10_multi_TDE01
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
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo