EIP-2026-104543

PRE-CVE

OpenBSD 3.x - ISAKMPD Security Association Piggyback Delete Payload Denial of Service

Title source: legacy
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for EIP-2026-104543. PoCs published by Thomas Walpuski.

AI-analyzed exploit summary This exploit sends a malformed UDP ISAKMP packet to OpenBSD's isakmpd daemon, causing it to delete security associations and policies, resulting in a denial of service for VPN connections. The script constructs a crafted packet with conflicting payloads for tunnel setup and deletion.

Description

OpenBSD 3.x - ISAKMPD Security Association Piggyback Delete Payload Denial of Service

Exploits (1)

exploitdb WORKING POC VERIFIED
by Thomas Walpuski · bashdosopenbsd
https://www.exploit-db.com/exploits/24181

This exploit sends a malformed UDP ISAKMP packet to OpenBSD's isakmpd daemon, causing it to delete security associations and policies, resulting in a denial of service for VPN connections. The script constructs a crafted packet with conflicting payloads for tunnel setup and deletion.

Classification
Working Poc 95%
Attack Type
Dos
Complexity
Moderate
Reliability
Reliable
Target: OpenBSD isakmpd daemon
No auth needed
Prerequisites: Network access to the target's UDP port 500 · Knowledge of the target's IP address and a fake source IP
devstral-2 · analyzed Feb 16, 2026 Full analysis →

Details

Status pre_cve
Tracked Since Feb 18, 2026