A Remote Code Execution (RCE) vulnerability exists in Ruijie Networks Ruijie RG-EW Series Routers up to ReyeeOS 1.55.1915 / EW_3.0(1)B11P55 via the updateVersion function in /cgi-bin/luci/api/wireless.
CVE-2021-43164
HIGHNVD 8.88.8—Elevated
EchelonGraph scoreMEDIUM confidence
Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2022-05-05. NVD baseline CVSS 8.8; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 35%CVSS: 8.8Exploit: Elevated riskExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 8.8
- EG Score
- 8.8(medium)
- EG Risk
- 60(Track)EG Risk 60/100SSVC: Track
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity88% × 45%Exploitation40% × 40%Automatability30% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- 35%
- EPSS %ILE
- 98%
- KEV
- Not listed
Published
May 4, 2022
Last Modified
July 9, 2026
References (4)
- cve@mitrehttp://packetstormsecurity.com/files/167099/Ruijie-Reyee-Mesh-Router-Remote-Code-Execution.html
- cve@mitrehttps://seclists.org/fulldisclosure/2022/May/0
- af854a3a-2127-422b-91ae-364da2661108http://packetstormsecurity.com/files/167099/Ruijie-Reyee-Mesh-Router-Remote-Code-Execution.html
- af854a3a-2127-422b-91ae-364da2661108https://seclists.org/fulldisclosure/2022/May/0
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Frequently asked(5)
What is CVE-2021-43164?
CVE-2021-43164 is a high vulnerability published on May 4, 2022. A Remote Code Execution (RCE) vulnerability exists in Ruijie Networks Ruijie RG-EW Series Routers up to ReyeeOS 1.55.1915 / EW_3.0(1)B11P55 via the updateVersion function in /cgi-bin/luci/api/wireless.
When was CVE-2021-43164 disclosed?
CVE-2021-43164 was first published in the National Vulnerability Database on May 4, 2022, with the most recent update on July 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-43164 actively exploited?
CVE-2021-43164 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 35% probability of exploitation in the next 30 days, which ranks it in the top 1.6% of all scored CVEs.
What is the CVSS score of CVE-2021-43164?
CVE-2021-43164 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2021-43164?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-43164, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2021-43164
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