High severity · published Dec 1, 2021
CVE-2021-20859
ELECOM LAN routers (WRC-1167GST2 firmware v1.25 and prior, WRC-1167GST2A firmware v1.25 and prior, WRC-1167GST2H firmware v1.25 and prior, WRC-2533GS2-B firmware v1.52 and prior,…
8.0
CVSS
0.6%
EPSS
No
On KEV
Description
ELECOM LAN routers (WRC-1167GST2 firmware v1.25 and prior, WRC-1167GST2A firmware v1.25 and prior, WRC-1167GST2H firmware v1.25 and prior, WRC-2533GS2-B firmware v1.52 and prior, WRC-2533GS2-W firmware v1.52 and prior, WRC-1750GS firmware v1.03 and prior, WRC-1750GSV firmware v2.11 and prior, WRC-1900GST firmware v1.03 and prior, WRC-2533GST firmware v1.03 and prior, WRC-2533GSTA firmware v1.03 and prior, WRC-2533GST2 firmware v1.25 and prior, WRC-2533GST2SP firmware v1.25 and prior, WRC-2533GST2-G firmware v1.25 and prior, and EDWRC-2533GST2 firmware v1.25 and prior) allows a network-adjacent authenticated attacker to execute an arbitrary OS command via unspecified vectors.
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Adjacent
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 47% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
EF
Edwrc-2533gst2 Firmware · Elecom
through 1.25 · source: NVD
WF
Wrc-1167gst2 Firmware · Elecom
through 1.25 · source: NVD
WF
Wrc-1167gst2a Firmware · Elecom
through 1.25 · source: NVD
WF
Wrc-1167gst2h Firmware · Elecom
through 1.25 · source: NVD
WF
Wrc-1750gs Firmware · Elecom
through 1.03 · source: NVD
WF
Wrc-1750gsv Firmware · Elecom
through 2.11 · source: NVD
WF
Wrc-1900gst Firmware · Elecom
through 1.03 · source: NVD
WF
Wrc-2533gs2-b Firmware · Elecom
through 1.52 · source: NVD
WF
Wrc-2533gs2-w Firmware · Elecom
through 1.52 · source: NVD
WF
Wrc-2533gst Firmware · Elecom
through 1.03 · source: NVD
WF
Wrc-2533gst2 Firmware · Elecom
through 1.25 · source: NVD
WF
Wrc-2533gst2-g Firmware · Elecom
through 1.25 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-20859
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-20859
Third Party Advisory
https://jvn.jp/en/jp/JVN88993473/index.html
Vendor Advisory
https://www.elecom.co.jp/news/security/20211130-01/
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