CVE-2026-55732

Status: DeferredHigh (8.7)—

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

Version: 4.0
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Base score: 8.7

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 0.54%
Percentile among all scored CVEs: 44
Score date: 10/4/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

🎯 ATT&CK techniques

How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.

ExploitationT1190 Exploit Public-Facing Applicationinitial access95 %
Primary impactT1499.004 Application or System Exploitationimpact90 %

Vector CVSS:4.0/AV:N/AC:L/PR:N/UI:N indica acceso remoto sin privilegios ni interacción (T1190). El ataque causa crash del proceso y reinicio del dispositivo vía paquete BACnet malformado, constituyendo DoS (T1499.004).

Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.

🛡️ ATT&CK mitigations that cover these techniques

Filter Network Traffic Vulnerability Scanning Privileged Account Management Network Segmentation Limit Access to Resource Over Network Application Isolation and Sandboxing

Affected technologies (8)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

Loytec — L Dali^AI Loytec — L Gate^AI Loytec — L INX^AI Loytec — L IOB^AI Loytec — L PAD^AI Loytec — L ROC^AI Loytec — L VIS^AI Loytec — LIP Me201c^AI

CWEs

CWE-125

References

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

Raw JSON (NVD)

Show

{
  "id": "CVE-2026-55732",
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  "metrics": {
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          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
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          "product": "L-DALI",
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  "published": "2026-07-24T15:18:31.543",
  "references": [
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      "source": "vulnerability@ncsc.ch"
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  "vulnStatus": "Deferred",
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  "descriptions": [
    {
      "lang": "en",
      "value": "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."
    }
  ],
  "lastModified": "2026-07-27T20:32:11.620",
  "sourceIdentifier": "vulnerability@ncsc.ch"
}