CVE-2021-1290: Cisco Small Business RV160, RV160W, RV260, RV260P, and RV260W VPN Routers Remote Code Execution Vulnerabilities

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 4.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-02-04 · updated 2026-06-17
Weakness: CWE-472

Description

Multiple vulnerabilities in the web-based management interface of Cisco Small Business RV160, RV160W, RV260, RV260P, and RV260W VPN Routers could allow an unauthenticated, remote attacker to execute arbitrary code as the root user on an affected device. These vulnerabilities exist because HTTP requests are not properly validated. An attacker could exploit these vulnerabilities by sending a crafted HTTP request to the web-based management interface of an affected device. A successful exploit could allow the attacker to remotely execute arbitrary code on the device.

Affected products

Cisco Rv160 Vpn Router Firmware: before 1.0.01.02 — fixed in 1.0.01.02
Cisco Rv160W Wireless-Ac Vpn Router Firmware: before 1.0.01.02 — fixed in 1.0.01.02
Cisco Rv260 Vpn Router Firmware: before 1.0.01.02 — fixed in 1.0.01.02
Cisco Rv260P Vpn Router With Poe Firmware: before 1.0.01.02 — fixed in 1.0.01.02
Cisco Rv260W Wireless-Ac Vpn Router Firmware: before 1.0.01.02 — fixed in 1.0.01.02

How to fix

Upgrade to a fixed version: Cisco Rv160 Vpn Router Firmware 1.0.01.02; Cisco Rv160W Wireless-Ac Vpn Router Firmware 1.0.01.02; Cisco Rv260 Vpn Router Firmware 1.0.01.02; Cisco Rv260P Vpn Router With Poe Firmware 1.0.01.02; Cisco Rv260W Wireless-Ac Vpn Router Firmware 1.0.01.02. Check the vendor advisory for mitigations.

References

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