HIGHCVSS v3.1 8.6Vulnerability
CVE-2026-49990
BACnet Stack is a BACnet open source protocol stack C library for embedded systems. From versions 1.4.2 to before 1.4.5, and 1.5.0 to before 1.5.1, a signed fileStartPosition taken from AtomicReadFile and AtomicWriteFile stream-access requests is not validated tightly enough before it reaches the RAM file backends. Practical impact includes: reliable denial of service via process crash, out-of-bounds read that may expose adjacent memory contents, or out-of-bounds write that may corrupt heap memory and destabilize the process. This issue has been patched in versions 1.4.5 and 1.5.1.
Properties
- Severity
- HIGH
- Nvd fetched at
- 2026-11-14T00:40:25.638091+00:00
- Cvss severity
- HIGH
- Cvss score
- 8.6
- Retrieved at
- 2026-11-14T00:50:05+00:00
- Score
- 8.6
- Cvss version
- 3.1
- Last source
- NVD
- Cve id
- CVE-2026-49990
- Cvss vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
- First seen by Signal
- 2026-11-13T17:31:47+00:00
- Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
- Published at
- 2026-11-13T16:19:01.983
- Last modified
- 2026-11-13T22:11:32.147
Related Entities (2)
HAS_WEAKNESS (2)
Related research
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