Known exploited vulnerability · CISA KEV

CVE-2018-0125: Cisco VPN Routers Remote Code Execution Vulnerability

A vulnerability in the web interface of the Cisco VPN Routers could allow an unauthenticated, remote attacker to execute arbitrary code as root and gain full control of an affected system.

CVE-2018-0125

Exploited in the wild. Fix this first.

CISA added it to the Known Exploited Vulnerabilities catalog on 2022-03-25: attackers are using it right now.

CISA KEV: Listed; Added 2022-03-25 · federal fix-by 2022-04-15
EPSS (30 days): 55%; Higher than 99.0% of CVEs · 2026-11-01
CVSS v3.1: 9.8 Critical; CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

What CISA says

Cisco VPN Routers Remote Code Execution Vulnerability

Apply updates per vendor instructions.

NVD description · published 2018-02-08

A vulnerability in the web interface of the Cisco RV132W ADSL2+ Wireless-N VPN and RV134W VDSL2 Wireless-AC VPN Routers could allow an unauthenticated, remote attacker to execute arbitrary code and gain full control of an affected system, including issuing commands with root privileges. The attacker could also cause an affected system to reload, resulting in a denial of service (DoS) condition. The vulnerability is due to an incomplete input validation on user-controlled input in an HTTP request to the targeted device. An attacker could exploit this vulnerability by sending a crafted HTTP request to an affected system. A successful exploit could allow the attacker to execute arbitrary code as the root user and gain full control of the affected system or cause it to reload, resulting in a DoS condition. This vulnerability is fixed in firmware version 1.0.1.11 for the following Cisco products: RV132W ADSL2+ Wireless-N VPN Router and RV134W VDSL2 Wireless-AC VPN Router. Cisco Bug IDs: CSCvg92737, CSCvh60170.

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How to check if you are exposed to CVE-2018-0125

Find every Cisco VPN Routers system you or your clients run, including ones exposed to the internet. Those come first: CISA only lists flaws attackers are already using.
Compare each version with the fixed versions in the vendor advisory. Where no fix exists yet, apply the vendor’s mitigation or take the system off the internet.
Run a credentialed vulnerability scan to catch the systems you missed, then check that the next scan no longer reports CVE-2018-0125.

US federal agencies had to fix this by 2022-04-15. Everyone else should treat that deadline as a guide: if it has passed, this is overdue.

Affected versions

Versions the National Vulnerability Database lists as vulnerable to CVE-2018-0125. Check the vendor advisory for the exact fixed builds before you sign anything off.

Product	Vulnerable versions
Cisco Rv132w Firmware	1.0
Cisco Rv134w Firmware	1.0

Timeline

2018-02-08 · Published in the National Vulnerability Database
2022-03-25 · Added to CISA's Known Exploited Vulnerabilities catalog, 1,506 days after it was published
2022-04-15 · Fix-by date for US federal agencies, passed 1,661 days ago

Weakness type

CWE-20

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Sources: CISA Known Exploited Vulnerabilities catalog (version 2026.10.30); EPSS data from FIRST.org; CVSS and descriptions from the NIST National Vulnerability Database. Checked 2026-11-01. This product uses the NVD API but is not endorsed or certified by the NVD.