CVE-2024-42739
Published: 13 August 2024
Summary
CVE-2024-42739 is a high-severity OS Command Injection (CWE-78) vulnerability in Totolink X5000R Firmware. Its CVSS base score is 8.8 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation of Remote Services (T1210); ranked in the top 9.6% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Deeper analysis
CVE-2024-42739 is an OS command injection vulnerability (CWE-78, CWE-94) affecting the TOTOLINK X5000r router running firmware version 9.1.0cu.2350_b20230313. The flaw resides in the setAccessDeviceCfg function within /cgi-bin/cstecgi.cgi and carries a CVSS 3.1 base score of 8.8.
Authenticated attackers with network access can exploit the issue by submitting crafted packets to the CGI endpoint, resulting in arbitrary command execution on the device with full impact to confidentiality, integrity, and availability.
The single reference is a technical report containing proof-of-concept details; no vendor advisory, patch information, or mitigation guidance is provided in the available data. The EPSS score has remained flat at 0.0542 with no upward trajectory observed after disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2024-39752
Vulnerability details
In TOTOLINK X5000r v9.1.0cu.2350_b20230313, the file /cgi-bin/cstecgi.cgi contains an OS command injection vulnerability in setAccessDeviceCfg. Authenticated Attackers can send malicious packet to execute arbitrary commands.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
OS command injection in the authenticated web CGI interface (/cgi-bin/cstecgi.cgi#setAccessDeviceCfg) enables remote code execution on the network device, directly mapping to Exploitation of Remote Services (T1210) and Network Device CLI abuse (T1059.008).
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Validates inputs to block special elements that would alter OS command execution.
Platform-independent apps typically execute inside a managed runtime or sandbox that restricts direct OS command execution, reducing the ability to exploit OS command injection.
Makes persistent code injection into loaded programs impossible when the executable image itself resides on hardware-protected read-only media.
Dynamically generated code can be produced and executed inside the isolated chamber, preventing host compromise from code-injection payloads.
Directly prevents execution of attacker-supplied code written into data memory regions.