Vulnerability identifier: #VU52005

Vulnerability risk: Low

CVSSv3.1: 5.9 [CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-20708

CWE-ID: CWE-78

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
Aterm WF1200CR
Hardware solutions / Routers & switches, VoIP, GSM, etc
Aterm WG1200CR
Hardware solutions / Routers & switches, VoIP, GSM, etc
Aterm WG2600HS
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor: NEC Corporation

Description

The vulnerability allows a remote user to execute arbitrary shell commands on the target system.

The vulnerability exists due to improper input validation. A remote administrator on the local network can pass specially crafted data to the application and execute arbitrary OS commands on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Aterm WF1200CR: 1.3.2

Aterm WG1200CR: 1.3.3

Aterm WG2600HS: 1.5.1

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External links
http://jvn.jp/en/jp/JVN29739718/index.html
http://jpn.nec.com/security-info/secinfo/nv21-010.html

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.