#VU20874 Hidden functionality in Cisco Systems, Inc products

Vulnerability identifier: #VU20874

Vulnerability risk: Medium

CVSSv4.0: 4.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: N/A

CWE-ID: CWE-912

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Cisco RV340 Dual WAN Gigabit VPN Router
Hardware solutions / Routers & switches, VoIP, GSM, etc
Cisco Small Business RV 260 Series VPN Router
Hardware solutions / Routers & switches, VoIP, GSM, etc
Cisco Small Business RV160 Series VPN Router
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor: Cisco Systems, Inc

Description

The vulnerability allows a remote attacker to compromise vulnerable system

The vulnerability exists due to hidden functionality (backdoor) is present in software. A remote authenticated attacker with access to the base operating system can use this functionality to view undocumented user accounts on an affected device. These accounts include debug-admin and root accounts.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Cisco RV340 Dual WAN Gigabit VPN Router: 1.0.00.33 - 1.0.02.16

Cisco Small Business RV 260 Series VPN Router: 1.0.00.13 - 1.0.00.15

Cisco Small Business RV160 Series VPN Router: 1.0.00.13 - 1.0.00.15

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External links
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190904-sb-vpnrouter

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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