CVE-2019-1663 — Rv110w Firmware
CRITICALCVE-2019-1663 is a critical-severity (CVSS 9.8) Buffer Overflow vulnerability in cisco rv110w firmware. 6 public exploit references exist, so weaponization risk is real. A fix is available — see the affected versions and patch details below.
A vulnerability in the web-based management interface of the Cisco RV110W Wireless-N VPN Firewall, Cisco RV130W Wireless-N Multifunction VPN Router, and Cisco RV215W Wireless-N VPN…
Exploitation Status
No confirmed exploitation observed yet
- CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
- A successful exploit gives an attacker total control of the affected component, not partial access.
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for CVE-2019-1663.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
CVE-2019-1663 by exploitation likelihood (EPSS) against impact (CVSS). In the shaded patch-first corner (EPSS 50%+, CVSS 7.0+).
Where this sits among everything scored
Of 397,508 CVEs with a current EPSS score, this one falls in the ≥ 90% band (highlighted). Counts from FIRST.org, log-scaled.
Description
A vulnerability in the web-based management interface of the Cisco RV110W Wireless-N VPN Firewall, Cisco RV130W Wireless-N Multifunction VPN Router, and Cisco RV215W Wireless-N VPN Router could allow an unauthenticated, remote attacker to execute arbitrary code on an affected device. The vulnerability is due to improper validation of user-supplied data in the web-based management interface. An attacker could exploit this vulnerability by sending malicious HTTP requests to a targeted device. A successful exploit could allow the attacker to execute arbitrary code on the underlying operating system of the affected device as a high-privilege user. RV110W Wireless-N VPN Firewall versions prior to 1.2.2.1 are affected. RV130W Wireless-N Multifunction VPN Router versions prior to 1.0.3.45 are affected. RV215W Wireless-N VPN Router versions prior to 1.3.1.1 are affected.
Affected Products
rv110w firmwareciscorv130w firmwareciscorv215w firmwareciscoResearch use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.
Cisco RV130W 1.0.3.44 - Remote Stack Overflow
by @0x00string · Jun 4, 2019
Cisco RV110W/RV130(W)/RV215W Routers Management Interface - Remote Command Execution (Metasploit)
by Metasploit · Sep 3, 2019
Cisco RV130W Routers - Management Interface Remote Command Execution (Metasploit)
by Metasploit · Apr 15, 2019
Detection & mitigation playbook
Vendor / applianceDetect
Inventory every cisco rv110w firmware deployment and check each version against the affected-products list above.
Fix
Apply the cisco rv110w firmware security patch or hotfix for CVE-2019-1663 on the affected version, following the vendor advisory for your exact build.
Workarounds
Stop feeding it untrusted input: reject or quarantine files and payloads from unverified sources until you can upgrade, restrict accepted formats to the ones you actually need, and run the parsing or decoding step in a least-privileged sandbox or short-lived worker so a crash or corrupted read cannot reach the rest of the process. Alongside that, restrict the management interface to trusted networks and apply the vendor's recommended configuration mitigations.
Frequently Asked Questions
Is CVE-2019-1663 being exploited in your environment?
Detect and block the exploit chain at execution, on systems you cannot patch yet.