CVE-2026-21878: bacnetstack bacnet stack

csirt@kutim:~/threat-intel/cve/CVE-2026-21878

CVSS 7.5 · High EPSS 0,41%

Kerentanan Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') pada bacnetstack bacnet stack. Skor CVSS 3.1 7.5 (High) menurut github.com.

Deskripsi (NVD)

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.

Rincian

Terbit di NVD: 13 Februari 2026
Terakhir diubah: 17 Juni 2026
Status NVD: Analyzed
CVSS 3.1: 7.5 (High), sumber github.com
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N · uraikan di kalkulator
Jenis kelemahan (CWE): CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
EPSS (30 hari): 0,41% peluang dieksploitasi; lebih tinggi dari 33,8% CVE lain

Produk dan versi terdampak

Vendor	Produk	Versi terdampak
bacnetstack	bacnet stack	Versi 1.5.0 rc1
bacnetstack	bacnet stack	Versi 1.5.0 rc2

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

https://github.com/bacnet-stack/bacnet-stack/security/advisories/GHSA-p8rx-c26w-545j exploit · advisory vendor
https://github.com/bacnet-stack/bacnet-stack/commit/c5dc00a77b4bc2550befa67a930b333e299c18f3 patch

Sumber: NVD · CVE.org · EPSS. Halaman ini disusun otomatis dari data tersebut; pembaruan terakhir 5 Okt 2026, 20:11 WITA. Kalau sistem di Perangkat Daerah memakai produk ini dan butuh bantuan, laporkan lewat kanal pelaporan.