CVSS 3.1
5.7 mediumCVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:HCVE-2023-35838
Medium (5.7) in wireguard wireguard. EPSS 0.7% chance of exploitation in the next 30 days.
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.
Severity
- EPSS
- 0.7% chance of exploitation in the next 30 days; higher than 52% of CVEs (scores of 2026-10-31)
- CWE
- CWE-610
- Published
- Modified
- Record from
- the NVD, synced
Affected
- wireguard:wireguard
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| PYSEC-2023-321 | PyPI | wireguard | <=0.5.3 | no fix published |