TI-2020-02909 Aliases CVE-2020-3357 GHSA-x7v4-2v57-r86h

Improper input validation in Cisco Small Business RV Series Router Firmware

MEDIUM 56CWE-20Published 2020-07-16 · Updated 2024-11-15

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: High · High · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.04236 91st percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Cisco	Cisco Small Business RV Series Router Firmware	all versions	—	No fix listed	CNA

Cisco Small Business RV Series Router Firmware VendorCisco Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 8

CPE	Versions	Role	Vendor
cpe:2.3:o:cisco:rv340_dual_wan_gigabit_vpn_router_firmware::::::::	before 1.0.03.18	Vulnerable	Cisco
cpe:2.3:h:cisco:rv340_dual_wan_gigabit_vpn_router:-:::::::*	not specified by NVD	Running on	Cisco
cpe:2.3:o:cisco:rv340w_dual_wan_gigabit_wireless-ac_vpn_router_firmware::::::::	before 1.0.03.18	Vulnerable	Cisco
cpe:2.3:h:cisco:rv340w_dual_wan_gigabit_wireless-ac_vpn_router:-:::::::*	not specified by NVD	Running on	Cisco
cpe:2.3:o:cisco:rv345_dual_wan_gigabit_vpn_router_firmware::::::::	before 1.0.03.18	Vulnerable	Cisco
cpe:2.3:h:cisco:rv345_dual_wan_gigabit_vpn_router:-:::::::*	not specified by NVD	Running on	Cisco
cpe:2.3:o:cisco:rv345p_dual_wan_gigabit_poe_vpn_router_firmware::::::::	before 1.0.03.18	Vulnerable	Cisco
cpe:2.3:h:cisco:rv345p_dual_wan_gigabit_poe_vpn_router:-:::::::*	not specified by NVD	Running on	Cisco

cpe:2.3:o:cisco:rv340_dual_wan_gigabit_vpn_router_firmware:*:*:*:*:*:*:*:* Versions before 1.0.03.18 Vulnerable ·Cisco
cpe:2.3:h:cisco:rv340_dual_wan_gigabit_vpn_router:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
cpe:2.3:o:cisco:rv340w_dual_wan_gigabit_wireless-ac_vpn_router_firmware:*:*:*:*:*:*:*:* Versions before 1.0.03.18 Vulnerable ·Cisco
cpe:2.3:h:cisco:rv340w_dual_wan_gigabit_wireless-ac_vpn_router:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
cpe:2.3:o:cisco:rv345_dual_wan_gigabit_vpn_router_firmware:*:*:*:*:*:*:*:* Versions before 1.0.03.18 Vulnerable ·Cisco
cpe:2.3:h:cisco:rv345_dual_wan_gigabit_vpn_router:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
cpe:2.3:o:cisco:rv345p_dual_wan_gigabit_poe_vpn_router_firmware:*:*:*:*:*:*:*:* Versions before 1.0.03.18 Vulnerable ·Cisco
cpe:2.3:h:cisco:rv345p_dual_wan_gigabit_poe_vpn_router:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2020-3357
2026-10-03 Alias added: GHSA-x7v4-2v57-r86h

References

Advisory 1

20200715 Cisco RV340, RV340W, RV345, and RV345P Dual WAN Gigabit VPN Routers SSL Remote Code Execution and Denial of Service Vulnerability

TI-2020-02910 Cisco RV340, RV340W, RV345, and RV345P Dual WAN Gigabit VPN Routers SSL Denial of Service Vulnerability CVSS 3.1HIGH 8.6
TI-2024-13326 Cisco RV340, RV340W, RV345, and RV345P Dual WAN Gigabit VPN Routers Privilege Escalation Vulnerability CVSS 3.1HIGH 8.8
TI-2024-13394 Cisco RV340, RV340W, RV345, and RV345P Dual WAN Gigabit VPN Routers Remote Code Execution Vulnerability CVSS 3.1HIGH 7.2

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences