HOMEVULNERABILITIESCVE-2021-20650
MEDIUM

CVE-2021-20650

CWE-352Published: February 12, 2021· Updated: Jun 17, 2026

6.5
CVSS v3.1

Official Description

Cross-site request forgery (CSRF) vulnerability in ELECOM NCC-EWF100RMWH2 allows remote attackers to hijack the authentication of administrators and execute an arbitrary request via unspecified vector. As a result, the device settings may be altered and/or telnet daemon may be started.

NVD Source

Technical Analysis

CVE-2021-20650 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

A successful exploit results in full integrity compromise (data manipulation), with a CVSS base score of 6.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionRequired
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

Affected Vendors & Products

elecom2 product(s)
ncc-ewf100rmwh2 firmwarencc-ewf100rmwh2
Source: NVD CPE · 2 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://jvn.jp/en/jp/JVN47580234/index.html
ADVISORYhttps://www.elecom.co.jp/news/security/20210126-01/
ADVISORYhttps://jvn.jp/en/jp/JVN47580234/index.html
ADVISORYhttps://www.elecom.co.jp/news/security/20210126-01/

All References (4)

→
https://jvn.jp/en/jp/JVN47580234/index.htmlThird Party Advisory
→
https://www.elecom.co.jp/news/security/20210126-01/Vendor Advisory
→
https://jvn.jp/en/jp/JVN47580234/index.htmlThird Party Advisory
→
https://www.elecom.co.jp/news/security/20210126-01/Vendor Advisory

Quick Facts

CVE IDCVE-2021-20650
CVSS Score6.5 / 10
SeverityMEDIUM
WeaknessCWE-352
CISA KEVNo
Affected1 vendor(s)
PublishedFeb 12, 2021

Related CVEs (CWE-352)

CVE-2025-23922
10.0
CVE-2017-5145
10.0
CVE-2025-32642
10.0
CVE-2024-56012
9.8
CVE-2020-23426
9.8
CVE-2025-23797
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-20650 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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