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  4. CVE 2026 102612 bacnet stack bacnetsc hub never requires a client
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Back to active CVEs
High · CVSS 8.1CVE-2026-102612

BACnet Stack: BACnet/SC hub never requires a client cert, so any host joins the mesh unauthenticatedCVE-2026-102612

Answer in brief

CVE-2026-102612 records a High severity (CVSS 8.1) vulnerability in BACnet Stack: BACnet/SC hub never requires a client cert, so any host joins the mesh unauthenticated. The current sources do not mark it as known exploited. The current feed maps bacnet-stack/bacnet-stack (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Nov 13, 2026Updated Nov 13, 2026Source checked Nov 13, 2026First seen by HOL Nov 13, 2026Material review Nov 13, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 8.1
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 8.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps bacnet-stack/bacnet-stack (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
bacnet-stack/bacnet-stackgeneric<1.4.6 || >=1.5.0 <1.5.2 || >=1.6.0 <1.6.11.4.6, 1.5.2, 1.6.1

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for bacnet-stack/bacnet-stack.
  2. 2Review the reported fix. Update bacnet-stack/bacnet-stack to 1.4.6 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Nov 13, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Nov 13, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Nov 13, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • BACnet Stack: BACnet/SC hub grows its WebSocket reassembly buffer without limit, so a peer can exhaust its memorySame bacnet-stack/bacnet-stack package
  • bacnet-stack BACnet/SC node always accepts a self-signed hub cert, so an attacker can MITM itSame bacnet-stack/bacnet-stack package
  • BACnet Stack: Structured View subordinate-list[0] WriteProperty allows unbounded synchronous resize and remote unauthenticated DoSSame bacnet-stack/bacnet-stack package
  • BACnet Stack: Replacing a RAMFS record with a shorter one via `AtomicWriteFile(record-access)` can trigger a heap out-of-bounds readSame bacnet-stack/bacnet-stack package
  • BACnet Stack: Consecutive AtomicWriteFile(record-access) appends can trigger a heap out-of-bounds read in the RAMFS file backendSame bacnet-stack/bacnet-stack package
  • BACnet Stack: `WriteProperty(File_Size)` can bypass read-only protection and expose uninitialized RAMFS tail bytes through `AtomicReadFile`Same bacnet-stack/bacnet-stack package

Record context

Vulnerability class
Missing Auth
EPSS
Not reported
CWE IDs
CWE-295
Source
CVE List V5
Source checked
Nov 13, 2026
References
2 linked sources
Open source record