CVE-2026-55732

Loytec LINX firmware: Out-of-bounds Read in BACnet packet parsing (bacdt_datetime_to_tod)

State: Published
Severity: 8.7 High
Published: Jul 24, 2026
Updated: Jul 24, 2026
Reserved: Jun 17, 2026

Description

Out-of-bounds Read (CWE-125) in BACnet packet parsing (`bacdt_datetime_to_tod`) in Loytec LIP-ME201C, L-INX, L-GATE, L-ROC, L-IOB, L-DALI, L-VIS and L-PAD through 8.4.18 on LINX-A64 allows an unauthenticated remote attacker to crash `linx_a64.exe` and ultimately reboot the device via a malformed BACnet TimeSynchronization or UTC-TimeSynchronization packet with an invalid month value. The same vulnerability affects multiple other Loytec products.

Scores

CVSS	Score	Vector	Source
4.0	8.7 High	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N	NCSC.ch

Weaknesses

CWE-125 Out-of-bounds read

Affected Products

Product	Versions
LIP-ME20xCLoytec	8.4.18 and earlierAffected
L-INXLoytec	8.4.18 and earlierAffected
L-GATELoytec	8.4.18 and earlierAffected
L-ROCLoytec	8.4.18 and earlierAffected
L-IOBLoytec	8.4.18 and earlierAffected
L-DALILoytec	8.4.18 and earlierAffected
L-VISLoytec	8.4.18 and earlierAffected
L-PADLoytec	8.4.18 and earlierAffected

References

https://www.loytec.com/support/product-security/advisories/8532-dibt-cve-20260608-0001-bacnet-crash-due-to-invalid-timesync-message-highvendor-advisory

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