CVE intelligence and bounded remediation

CVE-2024-20393 — Cisco Rv340 Dual Wan Gigabit Vpn Router Firmware security vulnerability

High CVSS 8.8

A vulnerability in the web-based management interface of Cisco Small Business RV340, RV340W, RV345, and RV345P Dual WAN Gigabit VPN Routers could allow an authenticated, remote attacker to elevate privileges on an affected device. This vulnerability exists because the web-based management interface discloses sensitive information. An attacker could exploit this vulnerability by sending crafted HTTP input to an affected device. A successful exploit could allow an attacker to elevate privileges from guest to admin.

Severity
High
CVSS
8.8 (3.1)
Published
2024-10-02
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-285

Affected products

  • cisco / rv340_dual_wan_gigabit_vpn_router_firmware / 1.0.00.29
  • cisco / rv340_dual_wan_gigabit_vpn_router_firmware / 1.0.00.33
  • cisco / rv340_dual_wan_gigabit_vpn_router_firmware / 1.0.01.16
  • cisco / rv340_dual_wan_gigabit_vpn_router_firmware / 1.0.01.17
  • cisco / rv340_dual_wan_gigabit_vpn_router_firmware / 1.0.01.18
  • cisco / rv340_dual_wan_gigabit_vpn_router_firmware / 1.0.01.20

Showing 6 representative product identities from 80 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

Authorization bypass, IDOR, and cross-tenant access

This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.

Check exposure

  • Map object and action authorization checks across API, UI, batch, import/export, and background-job paths.
  • Identify tenant, ownership, role, and policy boundaries for affected resources and administrative operations.
  • Use synthetic fixtures to compare intended access matrices without accessing another user's real data.

Remediate safely

  • Enforce server-side authorization at each resource access and state transition using the authenticated principal and trusted tenant context.
  • Scope data queries by tenant and ownership; treat client-supplied identifiers, roles, and policy claims as untrusted.
  • Add deny-by-default policy tests for horizontal and vertical access across every affected transport.

Authoritative sources

Complete CVE record and remediation plan

The detailed catalog view below loads this exact record, its source evidence, and the full seven-phase agentic change plan.