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NVD description
BACnet Stack is a BACnet open source protocol stack C library for embedded systems. Prior to 1.4.3, an off-by-one out-of-bounds read vulnerability in bacnet-stack's ReadPropertyMultiple service decoder allows unauthenticated remote attackers to read one byte past an allocated buffer boundary by sending a crafted RPM request with a truncated object identifier. The vulnerability is in rpm_decode_object_id(), which checks apdu_len < 5 but then accesses all 6 byte positions (indices 0-5) — consuming 1 byte for the context tag, 4 bytes for the object ID, then reading apdu[5] for the opening tag check. A 5-byte input passes the length check but causes a 1-byte OOB read, leading to crashes on embedded BACnet devices. The vulnerability exists in src/bacnet/rpm.c and affects any deployment that enables the ReadPropertyMultiple confirmed service handler (enabled by default in the reference server). This vulnerability is fixed in 1.4.3.
Priority
LOW
Exploitation
NONE
PoC
YES
Patch
NONE
Momentum
STABLE
If you run products in this scope, you should treat this CVE as relevant to your environment.
1 version affected across 1 product
CVE-2026-41502 Off-by-One Out-of-Bounds Read in BACnet Stack ReadPropertyMultiple Service Decoder https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-41502
Post summary
The text announces CVE‑2026‑41502 as an off‑by‑one out‑of‑bounds read in the BACnet stack, but provides no further details on exploitation, mitigation, or tooling.
CVE-2026-41502 BACnet Stack is a BACnet open source protocol stack C library for embedded systems. Prior to 1.4.3, an off-by-one out-of-bounds read vulnerability in bacnet-stack's R… https://www.cve.org/CVERecord?id=CVE-2026-41502
Post summary
The tweet announces CVE-2026-41502 as an off‑by‑one out‑of‑bounds read vulnerability in the bacnet-stack C library, without any PoC, exploit, or patch details.
4 of 4 entries
| Part | Vendor | Product | Version | Target SW | Target HW |
|---|---|---|---|---|---|
| App | bacnetstack | bacnet_stack | - | - | - |
| App | bacnetstack | bacnet_stack | 1.5.0 | - | - |
| App | bacnetstack | bacnet_stack | 1.5.0 | - | - |
| App | bacnetstack | bacnet_stack | 1.5.0 | - | - |