CVE-2023-4169
Ruijie Rg-Ew1200G Firmware 1.0\(1\)b1p5
Raw vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:LCVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.
Summary
CVE-2023-4169 is a medium-severity Improper Access Control (CWE-284) vulnerability in Ruijie Rg-Ew1200G Firmware. Its CVSS base score is 6.3 (Medium).
Operationally, ranked in the top 1% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Deeper analysis AI-assisted summary
Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.
A vulnerability has been identified in the Ruijie RG-EW1200G router running firmware version 1.0(1)B1P5. It resides in the /api/sys/set_passwd endpoint of the Administrator Password Handler component and stems from improper access controls (CWE-284). The issue permits manipulation of sensitive functionality without adequate authorization checks and carries a CVSS 3.1 score of 6.3.
Remote attackers who possess low-privileged credentials can exploit the flaw to alter administrator passwords or bypass intended access restrictions, resulting in limited but meaningful impacts to confidentiality, integrity, and availability. Public proof-of-concept code has been released, confirming that the attack requires no user interaction and can be executed over the network.
The vendor was notified prior to disclosure but did not respond or issue a patch. No official mitigation guidance is available; the primary references consist of a public GitHub repository containing exploit details and entries in the VulDB database. The associated EPSS score stands at 0.9193, indicating sustained exploitation interest following publication.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-54048
Vulnerability Data
A vulnerability was found in Ruijie RG-EW1200G 1.0(1)B1P5. It has been declared as critical. Affected by this vulnerability is an unknown functionality of the file /api/sys/set_passwd of the component Administrator Password Handler. The manipulation leads to improper access controls. The…
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attack can be launched remotely. The exploit has been disclosed to the public and may be used. The identifier VDB-236185 was assigned to this vulnerability. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.
- CWE(s)
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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.
The access control policy and procedures directly mandate and enforce proper access control mechanisms across the organization.
Device lock enforces restricted access until re-authentication, directly reducing unauthorized use of active sessions.
Supervision and review of access control activities directly detects and remediates improper access configurations or usages.
Explicitly identifying and documenting actions permitted without identification or authentication enforces proper access control boundaries by defining justified exceptions.
By automatically labeling outputs with security attributes, the control supports attribute-based enforcement and reduces exploitability of improper access control weaknesses.
Associating and retaining security attributes with data directly supports enforcement of access control decisions across storage, processing, and transmission.
Requiring prior authorization for each remote access type prevents improper access control over remote connections.
Requiring authorization of wireless access before allowing connections enforces proper access control for this access method.
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.
A.5.1 only requires that an information security policy and topic-specific policies (including on access control) exist and are reviewed; it does not itself enforce, implement or act on any access restriction, so the weakness can still be exploited (per the owner's explicit rule that governance/dependency clauses score none on effect verbs).
A.5.15 directly mandates determining requirements, defining/implementing topic-specific access control policy+rules (with explicit references to 8.3, 5.16, 5.18), and enforcing authorized access while preventing unauthorized access, which squarely stops exploitation of most CWE-284 instances; the bounded remainder is the physical slice (explicitly delegated to 7.2-7.4) plus any second-order defects like path traversal that are not authorization decisions.
A.5.16's identity lifecycle (unique binding, timely disable/remove, no duplicates, oversight of shared/non-human) directly stops most improper access by ensuring the actor in an access decision is correctly identified and authorized; the bounded remainder is non-identity mechanisms in CWE-284 such as path traversal or CSRF that do not turn on actor identity at all.
A.5.18 directly governs the provisioning, review, adjustment and timely revocation of both physical and logical access rights per business rules, segregation of duties and risk-evaluated changes/terminations; this stops most unauthorized-actor exploitation paths named by CWE-284, with a bounded remainder (e.g. path-traversal or CSRF cases that are not authorization decisions at all)
A.5.2 defines and assigns roles/responsibilities for protection of information and risk acceptance; it does not itself enforce any access decision and cannot stop exploitation of improper access control (per the owner's labeling rule: governance/dependency clauses do not score on prevent/mitigate verbs)
Ongoing audits and performance reviews of suppliers detect and correct situations where access controls or privilege assignments are weaker than contractually required, limiting an attacker's ability to exploit improper access control in the supplier's environment.
Hardening callouts derived
DISA STIG baselines are authored against specific weaknesses. Where this CVE cites a broad weakness class, the mapping is not asserted at that abstraction (owner ruling, 2026-09-25: grade only at Base and below), so no rule is shown here rather than a rule shown against the wrong grain.