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CVE Record

CVE-2021-43163: A Remote Code Execution (RCE) vulnerability exists in Ruijie Networks Ruijie RG-EW Series Routers up to Rey...

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 checkNet function in /cgi-bin/luci/api/auth.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

CVE-2021-43163 is a reported remote code execution flaw in Ruijie RG-EW Series routers running ReyeeOS up to 1.55.1915 / EW_3.0(1)B11P55. If exploitable, an attacker could run code on affected routers. No active exploitation is indicated by KEV or the provided sources.

Executive priority

Prioritize validation for internet-facing or business-critical Ruijie routers. Remote code execution on network edge devices can enable outage, traffic interception, or foothold creation, even though active exploitation is not confirmed here.

Technical view

The CVE description identifies RCE via the checkNet function in /cgi-bin/luci/api/auth on Ruijie Networks RG-EW Series routers up to the listed ReyeeOS/EW versions. The source bundle provides no CVSS score, CWE, confirmed patch version, or structured CPE data.

Likely exposure

Exposure is most relevant for organizations using Ruijie RG-EW Series routers at or below ReyeeOS 1.55.1915 / EW_3.0(1)B11P55, particularly where the router management/API surface is reachable from untrusted networks.

Exploitation context

A public Full Disclosure reference exists, but the bundle does not confirm exploitation in the wild. CISA KEV status is false. Treat this as a serious edge-device RCE report while verifying applicability and vendor guidance.

Researcher notes

Evidence is incomplete: CVSS, CWE, CPEs, and remediation details are absent from the source bundle. The description names Ruijie RG-EW and versions, while structured affected fields are n/a. Use vendor confirmation before declaring specific models remediated.

Mitigation direction

  • Inventory Ruijie RG-EW Series routers and record firmware versions.
  • Check Ruijie guidance for fixed firmware or official mitigations.
  • Restrict router management access to trusted administrative networks.
  • Disable internet exposure of management interfaces where possible.
  • Monitor for suspicious access to /cgi-bin/luci/api/auth.

Validation and detection

  • Confirm whether any deployed device is RG-EW Series.
  • Compare firmware against ReyeeOS 1.55.1915 / EW_3.0(1)B11P55.
  • Review perimeter exposure for router management services.
  • Check logs for unusual requests to /cgi-bin/luci/api/auth.
  • Document whether vendor-fixed firmware is available and installed.
Prepared
Confidence
medium
Sources
3

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

description · low confidence lookup

Execution behavior lookup

The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

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cve · low confidence lookup

CVE-2021-43163 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
3Timeline events
1ADP providers
2Source links

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CVECVE Program Container

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.