PT-2026-8020

BACnet Stack is a BACnet open source protocol stack C library for embedded systems. Prior to 1.5.0rc4 and 1.4.3rc2, a malformed WriteProperty request can trigger a length underflow in the BACnet stack, leading to an out‑of‑bounds read and a crash DoS. The issue is in wp.c within wp decode service...

BACnet Stack 缓冲区错误漏洞

BACnet Stack is an open-source protocol stack for BACnet, designed for use in embedded systems, Linux, MacOS, BSD, and Windows. Versions of BACnet Stack prior to 1.5.0rc4 and 1.4.3rc2 contain a buffer error vulnerability. This vulnerability arises from handling WriteProperty requests with incorre...

BACnet Protocol Stack 安全漏洞

BACnet Protocol Stack is a library suitable for various platforms, designed to provide communication services at the BACnet application layer, network layer, and Media Access Layer MAC. Versions of BACnet Protocol Stack such as 1.4.2, 1.5.0.rc2, and earlier versions have security vulnerabilities...

CVE-2026-21878: Improper Limitation of a Pathname to a Restricted Directory

BACnet Stack is a BACnet open source protocol stack C library for embedded systems. Prior to 1.5.0.rc3, a vulnerability has been discovered in BACnet Stack's file writing functionality where there is no validation of user-provided file paths, allowing attackers to write files to arbitrary...

PT-2026-8018

BACnet Protocol Stack library provides a BACnet application layer, network layer and media access MAC layer communications services. In 1.4.2, 1.5.0.rc2, and earlier, an off-by-one stack-based buffer overflow in the ubasic interpreter causes a crash SIGABRT when processing string literals longer...

CVE-2018-18878

In firmware version MS2.6.9900 of Columbia Weather MicroServer, the BACnet daemon does not properly validate input, which could allow a remote attacker to send specially crafted packets causing the device to become unavailable...

CVE-2021-31885

A vulnerability has been identified in APOGEE MBC PPC BACnet All versions, APOGEE MBC PPC P2 Ethernet All versions, APOGEE MEC PPC BACnet All versions, APOGEE MEC PPC P2 Ethernet All versions, APOGEE PXC Compact BACnet All versions = V2.3 and = V2.3 and = V2.3 and = V2.3 and = V2.3 and = V2.3 and...

CVE-2022-37122

Carel pCOWeb HVAC BACnet Gateway 2.1.0, Firmware: A2.1.0 - B2.1.0, Application Software: 2.15.4A Software v16 13020200 suffers from an unauthenticated arbitrary file disclosure vulnerability. Input passed through the 'file' GET parameter through the 'logdownload.cgi' Bash script is not properly...

CVE-2020-7233

KMS Controls BAC-A1616BC BACnet devices have a cleartext password of snowman in the BACKDOORNAME variable in the BCLogon.swf file...

CVE-2025-40555

A vulnerability has been identified in APOGEE PXC+TALON TC Series BACnet All versions. Affected devices start sending unsolicited BACnet broadcast messages after processing a specific BACnet createObject request. This could allow an attacker residing in the same BACnet network to send a specially...

CVE-2025-40556

A vulnerability has been identified in BACnet ATEC 550-440 All versions, BACnet ATEC 550-441 All versions, BACnet ATEC 550-445 All versions, BACnet ATEC 550-446 All versions. Affected devices improperly handle specific incoming BACnet MSTP messages. This could allow an attacker residing in the sa...

CVE-2024-41974

A low privileged remote attacker may modify the BACNet service properties due to incorrect permission assignment for critical resources which may lead to a DoS limited to BACNet communication...

CVE-2019-12480

BACnet Protocol Stack through 0.8.6 has a segmentation fault leading to denial of service in BACnet APDU Layer because a malformed DCC in AtomicWriteFile, AtomicReadFile and DeviceCommunicationControl services. An unauthenticated remote attacker could cause a denial of service bacserv daemon cras...

Out-of-bounds Read

Overview Affected versions of this package are vulnerable to Out-of-bounds Read via the npduisexpectedreply function. An attacker can cause a crash or misroute replies by sending specially crafted PDUs that trigger out-of-bounds reads. Remediation A fix was pushed into the master branch but not y...

CVE-2025-66624

BACnet Protocol Stack library provides a BACnet application layer, network layer and media access MAC layer communications services. Prior to 1.5.0.rc2, The npduisexpectedreply function in src/bacnet/npdu.c indexes requestpduoffset+2/3/5 and replypduoffset+1/2/4 without verifying that those APDU...

CVE-2025-66624 BACnet-stack MS/TP reply matcher OOB read

BACnet Protocol Stack library provides a BACnet application layer, network layer and media access MAC layer communications services. Prior to 1.5.0.rc2, The npduisexpectedreply function in src/bacnet/npdu.c indexes requestpduoffset+2/3/5 and replypduoffset+1/2/4 without verifying that those APDU...

CVE-2025-66624

CVE-2025-66624 affects the BACnet Protocol Stack prior to 1.5.0.rc2. The npdu_is_expected_reply function indexes APDU bytes (request_pdu[offset+2/3/5] and reply_pdu[offset+1/2/4]) without validating existence, allowing out-of-bounds reads in tiny PDUs. This can cause an immediate crash (DoS) on A...

CVE-2025-66624 BACnet-stack MS/TP reply matcher OOB read

BACnet Protocol Stack library provides a BACnet application layer, network layer and media access MAC layer communications services. Prior to 1.5.0.rc2, The npduisexpectedreply function in src/bacnet/npdu.c indexes requestpduoffset+2/3/5 and replypduoffset+1/2/4 without verifying that those APDU...

CVE-2025-66624 BACnet-stack MS/TP reply matcher OOB read

BACnet Protocol Stack library provides a BACnet application layer, network layer and media access MAC layer communications services. Prior to 1.5.0.rc2, The npduisexpectedreply function in src/bacnet/npdu.c indexes requestpduoffset+2/3/5 and replypduoffset+1/2/4 without verifying that those APDU...

EUVD-2025-201496

BACnet Protocol Stack library provides a BACnet application layer, network layer and media access MAC layer communications services. Prior to 1.5.0.rc2, The npduisexpectedreply function in src/bacnet/npdu.c indexes requestpduoffset+2/3/5 and replypduoffset+1/2/4 without verifying that those APDU...