Loytec LIP-ME20xC up to 8.4.18 BACnet Packet Parsing linx_a64.exe bacdt_datetime_to_tod out-of-bounds

Summaryinfo

A vulnerability was found in Loytec LIP-ME20xC, L-INX, L-GATE, L-ROC, L-IOB, L-DALI, L-VIS and L-PAD up to 8.4.18 and classified as critical. This affects the function bacdt_datetime_to_tod of the file linx_a64.exe of the component BACnet Packet Parsing. Executing a manipulation can lead to out-of-bounds. This vulnerability appears as CVE-2026-55732. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability has been found in Loytec LIP-ME20xC, L-INX, L-GATE, L-ROC, L-IOB, L-DALI, L-VIS and L-PAD up to 8.4.18 and classified as critical. This vulnerability affects the function bacdt_datetime_to_tod of the file linx_a64.exe of the component BACnet Packet Parsing. The manipulation with an unknown input leads to a out-of-bounds vulnerability. The CWE definition for the vulnerability is CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect availability. CVE summarizes:

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.

The advisory is available at loytec.com. This vulnerability was named CVE-2026-55732 since 06/17/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 07/24/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• Loytec

Name

• L-DALI
• L-GATE
• L-INX
• L-IOB
• L-PAD
• L-ROC
• L-VIS
• LIP-ME20xC

Version

• 8.4.0
• 8.4.1
• 8.4.2
• 8.4.3
• 8.4.4
• 8.4.5
• 8.4.6
• 8.4.7
• 8.4.8
• 8.4.9
• 8.4.10
• 8.4.11
• 8.4.12
• 8.4.13
• 8.4.14
• 8.4.15
• 8.4.16
• 8.4.17
• 8.4.18

CPE 2.3info

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CPE 2.2info

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