CVE intelligence and bounded remediation

CVE-2021-1330 — Cisco Rv016 Multi-Wan Vpn Router Firmware security vulnerability

High CVSS 9

Multiple vulnerabilities in the web-based management interface of Cisco Small Business RV016, RV042, RV042G, RV082, RV320, and RV325 Routers could allow an authenticated, remote attacker to execute arbitrary code or cause an affected device to restart unexpectedly. These vulnerabilities are due to improper validation of user-supplied input in the web-based management interface. An attacker could exploit these vulnerabilities by sending crafted HTTP requests to an affected device. A successful exploit could allow the attacker to execute arbitrary code as the root user on the underlying operating system or cause the device to reload, resulting in a denial of service (DoS) condition. To exploit these vulnerabilities, an attacker would need to have valid administrator credentials on the affected device.

Severity
High
CVSS
9 (2.0)
Published
2021-02-04
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-121

Affected products

  • cisco / rv016_multi-wan_vpn_router_firmware
  • cisco / rv042_dual_wan_vpn_router_firmware
  • cisco / rv042g_dual_gigabit_wan_vpn_router_firmware
  • cisco / rv082_dual_wan_vpn_router_firmware
  • cisco / rv320_dual_gigabit_wan_vpn_router_firmware
  • cisco / rv325_dual_gigabit_wan_vpn_router_firmware

Matched remediation archetype

Buffer bounds, memory safety, and memory corruption

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Check exposure

  • Identify affected native-code versions, build flags, architectures, parsers, codecs, drivers, and input paths in all shipped artifacts.
  • Determine whether untrusted data reaches the affected routine and the process privilege, sandbox, and network exposure.
  • Confirm statically linked, vendored, firmware, and platform-provided copies, not only package-manager records.

Remediate safely

  • Apply the maintained upstream correction or replace the affected component, then rebuild every dependent artifact from clean inputs.
  • Adopt bounds-checked interfaces, validated sizes and integer conversions, clear ownership, and memory-safe components where practical.
  • Enable supported compiler and runtime hardening and add sanitized tests and fuzz regression seeds derived from non-weaponized fixtures.

Authoritative sources

Complete CVE record and remediation plan

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