CVE-2026-102612

What it is

BACnet Stack is a BACnet open source protocol stack C library for embedded systems. Prior to versions 1.4.6, 1.5.2, and 1.6.1, bws_srv_start() in ports/linux/websocket-srv.c builds the libwebsockets server context with a CA certificate loaded but never sets LWS_SERVER_OPTION_REQUIRE_VALID_OPENSSL_CLIENT_CERT, so the hub accepts TLS connections from clients presenting no certificate at all. Any network-reachable host can join the BACnet/SC mesh without credentials. This issue has been patched in versions 1.4.6, 1.5.2, 1.6.1, and 1.7.0.

At a glance

Exploitability

Can be exploited over the network without logging in. High risk of data exposure, data tampering, service disruption.

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2026-09-29 14:18 UTC ReservedThe CVE id was reserved by its CNA
2. 2026-11-13 19:17 UTC PublishedDisclosed publicly on CVE.org and NVD
3. 2026-11-13 22:11 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: not scored yet.
• Severity: 8.1 HIGH (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2026-11-13 19:17 UTC

Last modified

2026-11-13 22:11 UTC

Weakness

CWE-295 · Improper certificate validation

Record status

Awaiting Analysis

Attack profile CVSS 3.1 · 8.1

Attack vector

Network

Complexity

High

Privileges needed

None

User interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2026-102612.md and follow it. Check whether this project is affected by CVE-2026-102612. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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