Which products and versions are affected by CVE-2021-43164?

Affected: Reyeeos (Ruijienetworks). The full list is in the CVE brief.

Is CVE-2021-43164 being exploited in the wild?

It is not listed in any known-exploited vulnerabilities catalog.

Is CVE-2021-43164 in the CISA KEV catalog?

No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.

Is there a public exploit for CVE-2021-43164?

Public exploit code is available.

Is there a fix for CVE-2021-43164?

Fixed versions are available, including Reyeeos <=1.55.1915_ew_3.0\(1\)b11p55, Reyeeos 1.55.1915_ew_3.0\(1\)b11p55.

How urgently should CVE-2021-43164 be patched?

Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.

Request A Demo

WatchlistHigh

CVE-2021-43164Reyeeos OS Command Injection

Q: What is 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.

Q: How urgently should CVE-2021-43164 be patched?

Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.

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.

Published May 3, 2022 · Updated Jul 9, 2026

Key Facts

Patch immediately

CVE-2021-43164 is a high-severity vulnerability (CVSS 8.8 v3.1) affecting Reyeeos (Ruijienetworks).
It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
EPSS estimates a 35% probability of exploitation in the next 30 days.
Fixed versions are available, including Reyeeos <=1.55.1915_ew_3.0\(1\)b11p55, Reyeeos 1.55.1915_ew_3.0\(1\)b11p55.
Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.

Scores

CVSS v3.1

8.8

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS (30-day exploit likelihood)

35%

Higher than 98.4% of all scored CVEs

Exploit maturity

Proof of concept

ATLAS score

41/100

Publication score, see How it works

Exploitation Verdict

KEV listed

Not listed

Federal due date

None

No federal due date

Ransomware use

Not reported

Attributed actors

None named

Exploit & Defence Guidance

Exploit maturity

Proof of concept

Public exploit code

Proof-of-concept links

In-the-wild evidence

Reports of active use

Advisories And Exploit References

advisoryhttps://seclists.org/fulldisclosure/2022/May/0

Description

Affected Products

1 affected entries in total

Product	Affected versions	Fixed in
ReyeeosRuijienetworks	See advisory	1.55.1915_ew_3.0\(1\)b11p55

Patched Releases

Reyeeos

<=1.55.1915_ew_3.0\(1\)b11p55

Timeline

Publicly disclosed
May 3, 2022
Last updated
Jul 9, 2026

Weakness Type

CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

References

advisoryseclists.org · 0
exploitpacketstormsecurity.com · Ruijie-Reyee-Mesh-Router-Remote-Code-Execution.…
exploitExploitDB-50930
otherruijie.com

FAQ

Common Questions.

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.
Affected: Reyeeos (Ruijienetworks). The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including Reyeeos <=1.55.1915_ew_3.0\(1\)b11p55, Reyeeos 1.55.1915_ew_3.0\(1\)b11p55.
Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.

Is CVE-2021-43164 On Your Attack Surface?

Brandefense matches it against the products discovered on your perimeter and opens a finding the day a CVE like this is listed.

Request A Demo