CVE-2026-49990
HIGH
MEDIUM
Priority: 0.03
BB Relevance:
77/100
Published: 2026-11-13
Modified: 2026-11-13
First seen: 2026-11-13
Status: active
Attack Surface
Network
Low Complexity
No Auth
No Interaction
CVSS Vector Breakdown
AV:
Network
AC:
Low
PR:
None
UI:
None
S:
Unchanged
C:
Low
I:
Low
A:
High
Description
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.
Weakness Classification (2)
Affected Software (4)
| Vendor | Product | Version |
|---|---|---|
| bacnet-stack | bacnet-stack | >= 1.4.2, < 1.4.5 |
| bacnet-stack | bacnet-stack | >= 1.5.0, < 1.5.1 |
| bacnet-stack | bacnet-stack | >= 1.4.2, < 1.4.5 |
| bacnet-stack | bacnet-stack | >= 1.5.0, < 1.5.1 |
References & Advisories (2)
x_refsource_MISC
x_refsource_CONFIRM