CVE-2024-39781
Published: 14 January 2025
Summary
CVE-2024-39781 is a critical-severity Command Injection (CWE-77) vulnerability in Wavlink Wl-Wn533A8 Firmware. Its CVSS base score is 9.1 (Critical).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 30.1% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).
Deeper analysis
CVE-2024-39781 is a set of multiple OS command injection vulnerabilities in the adm.cgi sch_reboot() functionality of the Wavlink AC3000 router running firmware version M33A8.V5030.210505. These flaws, classified under CWE-77, stem from inadequate sanitization in the `restart_hour` POST parameter, allowing a specially crafted HTTP request to inject and execute arbitrary operating system commands.
An authenticated attacker with high privileges can exploit these vulnerabilities over the network with low complexity and no user interaction required. Successful exploitation leads to arbitrary code execution with high confidentiality, integrity, and availability impacts, as reflected in the CVSS v3.1 base score of 9.1 (AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H). The changed scope (S:C) indicates potential effects beyond the vulnerable component.
Mitigation details are available in the Talos Intelligence advisory TALOS-2024-2033, accessible at https://talosintelligence.com/vulnerability_reports/TALOS-2024-2033. The vulnerability was published on January 14, 2025.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2024-38360
Vulnerability details
Multiple OS command injection vulnerabilities exist in the adm.cgi sch_reboot() functionality of Wavlink AC3000 M33A8.V5030.210505. A specially crafted HTTP request can lead to a arbitrary code execution. An attacker can make an authenticated HTTP request to trigger these vulnerabilities.A command…
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injection vulnerability exists in the `restart_hour` POST parameter.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
OS command injection in network-exposed router web CGI (adm.cgi) directly enables remote code execution via crafted POST parameters, mapping to public-facing app exploitation and Unix shell command execution.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly requires validation and sanitization of inputs like the restart_hour POST parameter to prevent OS command injection vulnerabilities.
Mandates timely identification, reporting, and remediation of flaws such as this command injection vulnerability through patching or code fixes.
Enforces least privilege to restrict high-privilege access required for authenticated exploitation of the sch_reboot functionality.