🛡️ CVE-2026-21878
🟠 CVSS 7.5 — High ⚠️ Exploit Public CWE-22 NVD
7.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

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 directories. This affects apps/readfile/main.c and ports/posix/bacfile-posix.c. This vulnerability is fixed in 1.5.0.rc3.

Details

Severity HIGH
CVSS Score 7.5
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CWE CWE-22
Public Exploit ⚠️ Yes
Source NVD
Published 2026-02-13
Updated 2026-06-02
Modified 2026-02-18

Affected Packages

Software From version Fixed in
bacnet-stack

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