CVE-2020-3357
9.8 · CRITICALOverview
CVE-2020-3357 is a critical-severity vulnerability affecting cisco rv340_dual_wan_gigabit_vpn_router_firmware. It was published on July 16, 2020 and has a CVSS 3.1 base score of 9.8 (CRITICAL).
This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
A vulnerability in the Secure Sockets Layer (SSL) VPN feature of Cisco Small Business RV340, RV340W, RV345, and RV345P Dual WAN Gigabit VPN Routers could allow an unauthenticated, remote attacker to execute arbitrary code on an affected device or cause the device to reload, resulting in a denial of service (DoS) condition. The vulnerability exists because HTTP requests are not properly validated. An attacker could exploit this vulnerability by sending a crafted HTTP request over an SSL connection to an affected device. A successful exploit could allow the attacker to remotely execute arbitrary code on the device or cause the device to reload, resulting in a DoS condition.
Remediation
Check the references section for vendor advisories and patches from cisco. Update rv340_dual_wan_gigabit_vpn_router_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| cisco | rv340_dual_wan_gigabit_vpn_router_firmware | >= 0, < 1.0.03.18 | Affected |
| cisco | rv340w_dual_wan_gigabit_wireless-ac_vpn_router_firmware | >= 0, < 1.0.03.18 | Affected |
| cisco | rv345_dual_wan_gigabit_vpn_router_firmware | >= 0, < 1.0.03.18 | Affected |
| cisco | rv345p_dual_wan_gigabit_poe_vpn_router_firmware | >= 0, < 1.0.03.18 | Affected |
Frequently Asked Questions
What is CVE-2020-3357?
CVE-2020-3357 is a critical-severity vulnerability affecting cisco rv340_dual_wan_gigabit_vpn_router_firmware. It was published on July 16, 2020 and has a CVSS 3.1 base score of 9.8 (CRITICAL).
How severe is CVE-2020-3357?
This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2020-3357?
Check the references section for vendor advisories and patches from cisco. Update rv340_dual_wan_gigabit_vpn_router_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2020-3357?
CyberStrike's AI-powered security agents can automatically detect CVE-2020-3357 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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