What is CVE-2021-43164?

CVE-2021-43164 is a high-severity vulnerability in Ruijienetworks Reyeeos, classified under OS Command Injection. CVSS score: 8.8/10. Published 2022-05-04.

How severe is CVE-2021-43164?

High severity. CVSS v3 base score is 8.8 out of 10.

Is CVE-2021-43164 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

RCE in Ruijienetworks Reyeeos

CVE-2021-43164

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.

Vulnerability class: Command Injection (OS Command Injection)

Published 2022-05-04 · last modified 2026-07-09.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.350 (98.4th percentile), scored 2026-09-30.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 98th percentile — 98.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.350 · newest: 0.350 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-78 — OS Command Injection

Public proof-of-concept exploits

References

af854a3a-2127-422b-91ae-364da2661108 (Not Applicable)
seclists.org/fulldisclosure/2022/May/0 (Mailing List, Third Party Advisory)
packetstormsecurity.com/files/167099/Ruijie-Reyee-Mesh-Router-Remote-Code-Execu… (Exploit, VDB Entry, Third Party Advisory)

Frequently asked questions

What is CVE-2021-43164?: CVE-2021-43164 is a high-severity vulnerability in Ruijienetworks Reyeeos, classified under OS Command Injection. CVSS score: 8.8/10. Published 2022-05-04.
How severe is CVE-2021-43164?: High severity. CVSS v3 base score is 8.8 out of 10.
Is CVE-2021-43164 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.