How severe is CVE-2021-43164?

CVE-2021-43164 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-43164 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 35% (98th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-43164?

CVE-2021-43164 affects Ruijienetworks Reyeeos. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-43164?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-43164 published?

CVE-2021-43164 was published on 2022-05-04 and last updated on 2026-07-09.

CVE-2021-43164

CVE-2021-43164 is a high-severity vulnerability in Ruijienetworks Reyeeos with a CVSS 3.x base score of 8.8. Its EPSS exploit-prediction score of 35% places it in the 98th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-78.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.5
EPSS exploit prediction: 35% (98th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Ruijienetworks Reyeeos
Published: 2022-05-04
Last modified: 2026-07-09

Description

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.

Frequently asked questions

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.
How severe is CVE-2021-43164?: CVE-2021-43164 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-43164 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 35% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-43164?: CVE-2021-43164 affects Ruijienetworks Reyeeos. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-43164?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-43164 published?: CVE-2021-43164 was published on 2022-05-04 and last updated on 2026-07-09.

References

Affected products (1)

cpe:2.3:o:ruijienetworks:reyeeos:*:*:*:*:*:*:*:*

More vulnerabilities in Ruijienetworks Reyeeos

CVE-2021-43163 — Critical (CVSS 9.8): A Remote Code Execution (RCE) vulnerability exists in Ruijie Networks Ruijie RG-EW Series Routers up to ReyeeOS…
CVE-2021-43162 — High (CVSS 8.8): A Remote Code Execution (RCE) vulnerability exists in Ruijie Networks Ruijie RG-EW Series Routers up to ReyeeOS…
CVE-2021-43161 — High (CVSS 8.8): A Remote Code Execution (RCE) vulnerability exists in Ruijie Networks Ruijie RG-EW Series Routers up to ReyeeOS…
CVE-2021-43160 — High (CVSS 8.8): A Remote Code Execution (RCE) vulnerability exists in Ruijie Networks Ruijie RG-EW Series Routers up to ReyeeOS…
CVE-2021-43159 — High (CVSS 8.8): A Remote Code Execution (RCE) vulnerability exists in Ruijie Networks Ruijie RG-EW Series Routers up to ReyeeOS…

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