Permissions, Privileges, and Access Controls in Cisco Systems, Inc products - CVE-2021-1520

Vulnerability identifier: #VU52966

CSH Severity: Low

CVSS v4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2021-1520

CWE-ID: CWE-264

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to an internal messaging service does not properly sanitize input. A local administrator can run arbitrary commands with root privileges on the underlying OS.

Cisco RV340 Dual WAN Gigabit VPN Router
Cisco RV340W Dual WAN Gigabit Wireless-AC VPN Router
Cisco RV345 Dual WAN Gigabit VPN Router
Cisco RV345P Dual WAN Gigabit VPN Router

Install updates from vendor's website.

Cisco RV340 Dual WAN Gigabit VPN Router - update to 1.0.03.21
Cisco RV340W Dual WAN Gigabit Wireless-AC VPN Router - update to 1.0.03.21
Cisco RV345 Dual WAN Gigabit VPN Router - update to 1.0.03.21
Cisco RV345P Dual WAN Gigabit VPN Router - update to 1.0.03.21

• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-rv-34x-privesc-GLN8ZAQE

• Privilege escalation in Cisco RV340, RV340W, RV345 and RV345P Dual WAN Gigabit VPN Routers