CVE-2026-55732: CWE-125 Out-of-bounds read in Loytec LIP-ME20xC
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.
AI Analysis
Technical Summary
CVE-2026-55732 is an out-of-bounds read vulnerability in the BACnet packet parsing implementation (specifically in the bacdt_datetime_to_tod function) affecting Loytec LIP-ME201C, L-INX, L-GATE, L-ROC, L-IOB, L-DALI, L-VIS, and L-PAD products running firmware through version 8.4.18 on the LINX-A64 platform. An unauthenticated remote attacker can exploit this by sending a specially crafted BACnet TimeSynchronization or UTC-TimeSynchronization packet with an invalid month value, causing the linx_a64.exe process to crash and potentially reboot the device. This vulnerability has a CVSS 4.0 score of 8.7 (high severity) and does not require user interaction or privileges to exploit.
Potential Impact
Successful exploitation leads to a denial of service condition by crashing the linx_a64.exe process and rebooting the affected device. This disrupts normal device operation and could impact availability of building automation or control systems relying on these Loytec products.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround is currently documented. Until a patch is available, network-level filtering or blocking of malformed BACnet TimeSynchronization or UTC-TimeSynchronization packets may reduce exposure, but no vendor-provided mitigations are confirmed.
CVE-2026-55732: CWE-125 Out-of-bounds read in Loytec LIP-ME20xC
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.
CVSS v4.0
Score 8.7high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-55732 is an out-of-bounds read vulnerability in the BACnet packet parsing implementation (specifically in the bacdt_datetime_to_tod function) affecting Loytec LIP-ME201C, L-INX, L-GATE, L-ROC, L-IOB, L-DALI, L-VIS, and L-PAD products running firmware through version 8.4.18 on the LINX-A64 platform. An unauthenticated remote attacker can exploit this by sending a specially crafted BACnet TimeSynchronization or UTC-TimeSynchronization packet with an invalid month value, causing the linx_a64.exe process to crash and potentially reboot the device. This vulnerability has a CVSS 4.0 score of 8.7 (high severity) and does not require user interaction or privileges to exploit.
Potential Impact
Successful exploitation leads to a denial of service condition by crashing the linx_a64.exe process and rebooting the affected device. This disrupts normal device operation and could impact availability of building automation or control systems relying on these Loytec products.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround is currently documented. Until a patch is available, network-level filtering or blocking of malformed BACnet TimeSynchronization or UTC-TimeSynchronization packets may reduce exposure, but no vendor-provided mitigations are confirmed.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- NCSC.ch
- Date Reserved
- 2026-06-17T09:48:05.268Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a6378c49c2644c7f8151c47
Added to database: 07/24/2026, 14:37:56 UTC
Last enriched: 07/24/2026, 14:52:04 UTC
Last updated: 07/25/2026, 01:51:27 UTC
Views: 14
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