Vulnerability identifier: #VU70084

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-2022-43486

CWE-ID: CWE-912

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
WSR-3200AX4S
Hardware solutions / Routers & switches, VoIP, GSM, etc
WSR-3200AX4B
Hardware solutions / Routers & switches, VoIP, GSM, etc
WSR-2533DHP
Hardware solutions / Routers & switches, VoIP, GSM, etc
WSR-2533DHP2
Hardware solutions / Routers & switches, VoIP, GSM, etc
WSR-A2533DHP2
Hardware solutions / Routers & switches, VoIP, GSM, etc
WSR-2533DHP3
Hardware solutions / Routers & switches, VoIP, GSM, etc
WSR-A2533DHP3
Hardware solutions / Routers & switches, VoIP, GSM, etc
WSR-2533DHPL
Hardware solutions / Routers & switches, VoIP, GSM, etc
WSR-2533DHPL2
Hardware solutions / Routers & switches, VoIP, GSM, etc
WSR-2533DHPLS
Hardware solutions / Routers & switches, VoIP, GSM, etc
WCR-1166DS
Hardware solutions / Routers & switches, VoIP, GSM, etc
WEX-1800AX4
Hardware solutions / Routers & switches, VoIP, GSM, etc
WEX-1800AX4EA
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor: BUFFALO INC.

Description

The vulnerability allows a remote user to compromise vulnerable system

The vulnerability exists due to hidden functionality (backdoor) is present in software. A remote administrator on the local network can use this functionality to gain full access to the application and execute arbitrary commands on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

WSR-3200AX4S: 1.26

WSR-3200AX4B: 1.25

WSR-2533DHP: 1.08

WSR-2533DHP2: 1.22

WSR-A2533DHP2: 1.22

WSR-2533DHP3: 1.26

WSR-A2533DHP3: 1.26

WSR-2533DHPL: 1.08

WSR-2533DHPL2: 1.03

WSR-2533DHPLS: 1.07

WCR-1166DS: 1.34

WEX-1800AX4: 1.13

WEX-1800AX4EA: 1.13

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External links
http://jvn.jp/en/vu/JVNVU97099584/index.html
http://www.buffalo.jp/news/detail/20221205-01.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.