CVE-2024-42936
RCE in Ruijie Reyee Os 1.300.1422
Raw vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HSummary
CVE-2024-42936 is a critical-severity Code Injection (CWE-94) vulnerability in Ruijie Reyee Os. Its CVSS base score is 9.8 (Critical).
Operationally, exploitation aligns with the MITRE ATT&CK technique Command and Scripting Interpreter (T1059); ranked in the top 38% 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 map to SA-11 (Developer Testing and Evaluation) and SI-10 (Information Input Validation) — see the control section below for these in your framework.
Deeper analysis AI-assisted summary
Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.
CVE-2024-42936 is a critical remote code execution (RCE) vulnerability (CVSS 3.1 score of 9.8) affecting the mqlink.elf service component in the Ruijie RG-EW300N router running ReyeeOS firmware version 1.300.1422. The flaw, classified under CWE-94 (code injection), arises from insufficient validation of MQTT broker messages, allowing attackers to inject and execute arbitrary code remotely. It was published on January 21, 2025.
An unauthenticated attacker with network access can exploit this vulnerability with low complexity and no user interaction required (AV:N/AC:L/PR:N/UI:N). Successful exploitation grants high-impact confidentiality, integrity, and availability compromise (C:H/I:H/A:H) through RCE, potentially enabling full device takeover, data exfiltration, or use as a pivot point in larger network attacks.
Advisories and mitigation details are available in the referenced GitHub gist (https://gist.github.com/smrx86/2008111b12ab47882b3928d0cbc9e415), which likely includes exploit proof-of-concept and further technical analysis. Practitioners should check for firmware updates from Ruijie and apply network segmentation or MQTT traffic filtering as interim measures.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2024-39451
Vulnerability Data
The mqlink.elf is service component in Ruijie RG-EW300N with firmware ReyeeOS 1.300.1422 is vulnerable to Remote Code Execution via a modified MQTT broker message.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise Techniques
CVEs Like This One
Affected Assets
Mitigating Controls
Control response
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V1.3.1
Mitigating Controls (NIST 800-53 r5) AI
Developer testing and evaluation finds code paths that accept and execute externally influenced strings.
Input validation directly stops untrusted data from being used to construct executable code without neutralization.
Least privilege limits the damage an injected code fragment can perform once executed.
Requiring documented secure development standards and tools enforces use of safe code-generation APIs and escaping.
Mitigating Controls (NIST CSF 2.0) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.
PR.PS-06's SDLC practices directly target injection flaws via secure coding and testing (mostly), yet as a single broad outcome it leaves many code-generation specifics unaddressed (partial).
PR.DS-10 protects runtime data confidentiality/integrity but has no bearing on neutralizing externally influenced input during code generation, so neither direction shows any preventive effect.
Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.
Banning unapproved code samples and unauthenticated web services, combined with secure-coding standards and SAST, prevents the dynamic generation or inclusion of attacker-supplied code.
Controls that restrict unauthorized or malicious code from being introduced via external networks or removable media limit opportunities for an attacker to inject and execute arbitrary code.