MEDIUM
CVE-2021-20648
CWE-78Published: February 12, 2021· Updated: Jun 17, 2026
6.8
CVSS v3.1
Official Description
ELECOM WRC-300FEBK-S allows an attacker with administrator rights to execute arbitrary OS commands via unspecified vectors.
Technical Analysis
CVE-2021-20648 requires adjacent network access, limiting remote exploitation but still posing risk in shared or local network environments.
Exploitation requires high privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 6.8.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorAdjacent
Attack ComplexityLow
Privileges Req.High
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Affected Vendors & Products
elecom2 product(s)
wrc-300febk-s firmwarewrc-300febk-s
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
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-2021-20648
CVSS Score6.8 / 10
SeverityMEDIUM
WeaknessCWE-78
CISA KEVNo
Affected1 vendor(s)
PublishedFeb 12, 2021
Related CVEs (CWE-78)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2021-20648 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.