Vulnerability · Published Jul 24, 2026 · Assigned by NCSC.ch

CVE-2026-55732Loytec LINX firmware: Out-of-bounds Read in BACnet packet parsing (bacdt_datetime_to_tod)

High 8.7

In plain English

A high-severity out-of-bounds read in L-DALI from Loytec. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 46% of all known vulnerabilities).

Severity (CVSS 4.0)8.7High

Exploit odds (30 days)0.5%top 54.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
Loytec	LIP-ME20xC	0 – through 8.4.18
Loytec	L-INX	0 – through 8.4.18
Loytec	L-GATE	0 – through 8.4.18
Loytec	L-ROC	0 – through 8.4.18
Loytec	L-IOB	0 – through 8.4.18
Loytec	L-DALI	0 – through 8.4.18
Loytec	L-VIS	0 – through 8.4.18
Loytec	L-PAD	0 – through 8.4.18

Weakness: CWE-125 · Vector: 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

References

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