Authenticated code execution via unchecked en_enable concatenation
Published Jan 14, 2025 · Updated Nov 3, 2025
Stack buffer overflow in Wavlink AC3000 M33A8.V5030.210505 allows remote authenticated users to execute code via an HTTP request. The set_qos() path in internet.cgi appends the unrestricted en_enable POST value to a 0x400-byte stack buffer with strcat, overwriting the return address. A valid session cookie and network access to the management interface are required; successful exploitation executes attacker-controlled code or crashes internet.cgi.
Summary
What happened
Stack buffer overflow in Wavlink AC3000 M33A8.V5030.210505 allows remote authenticated users to execute code via an HTTP request. The set_qos() path in internet.cgi appends the unrestricted en_enable POST value to a 0x400-byte stack buffer with strcat, overwriting the return address. A valid session cookie and network access to the management interface are required; successful exploitation executes attacker-controlled code or crashes internet.cgi.
The record
- CVE
- CVE-2024-39770
- Published
- Jan 14, 2025
- Updated
- Nov 3, 2025
- Vendor
- Wavlink
- Product
- AC3000 Tri-band Wi-Fi Router
- Classifications
- CWE-120, T1210
- Attack vector
- network
- Privileges
- admin
Timeline
How it unfolded
- Jan 14, 2025CVE publishedPublication date reported by the CVE source.
- Nov 3, 2025Record 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=M33A8.V5030.210505
What conditions does exploitation require?
What is affected?
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
- Cisco Talos en_enable overflow demonstrationproof of concept · demonstrated
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