Vulnerability identifier: #VU52008

Vulnerability risk: Medium

CVSSv3.1: 7.7 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-20711

CWE-ID: CWE-78

Exploitation vector: Local network

Exploit availability: No

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

Vendor: NEC Corporation

Description

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

The vulnerability exists due to improper input validation. A remote attacker 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 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 non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

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