Medium severity · published Dec 1, 2021
CVE-2021-20853
ELECOM LAN routers (WRH-733GBK firmware v1.02.9 and prior and WRH-733GWH firmware v1.02.9 and prior) allows a network-adjacent attacker with an administrator privilege to execute…
6.8
CVSS
0.4%
EPSS
No
On KEV
Description
ELECOM LAN routers (WRH-733GBK firmware v1.02.9 and prior and WRH-733GWH firmware v1.02.9 and prior) allows a network-adjacent attacker with an administrator privilege to execute arbitrary OS commands via unspecified vectors.
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Attack vector
Adjacent
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 38% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
WF
Wrh-733gbk Firmware · Elecom
through 1.02.9 · source: NVD
WF
Wrh-733gwh Firmware · Elecom
through 1.02.9 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-20853
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-20853
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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