Is CVE-2026-41502 actively exploited?

No active exploitation of CVE-2026-41502 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-41502 be exploited remotely?

Yes. CVE-2026-41502 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-41502?

CVE-2026-41502 has a CVSS score of 7.5 (HIGH).

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HIGH

CVE-2026-41502

CWE-125Published: April 24, 2026· Updated: Apr 28, 2026

7.5

CVSS v3.1

EPSS:0.14%probability of exploitation in 30 daysPercentile:33.9th

Official 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.

NVD Source

Technical Analysis

CVE-2026-41502 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.