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Case File

CVE-2023-35838

MEDIUM · CVSS 5.7 EPSS 0.81%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2023-08-09 · Last synced 2026-08-04

CyberRota Analysis

This is a medium severity vulnerability with a CVSS score of 5.7. It affects Windows.

CVE
CVE-2023-35838
Severity
MEDIUM
CVSS
5.7
EPSS
0.81%
Windows

Original NVD Description

The WireGuard client 0.5.3 on Windows insecurely configures the operating system and firewall such that traffic to a local network that uses non-RFC1918 IP addresses is blocked. This allows an adversary to trick the victim into blocking IP traffic to selected IP addresses and services even while the VPN is enabled. NOTE: the tunnelcrack.mathyvanhoef.com website uses this CVE ID to refer more generally to "LocalNet attack resulting in the blocking of traffic" rather than to only WireGuard.

Related CVEs

Other vulnerabilities affecting the same vendor(s)