CVE-2026-55732
Unauthenticated BACnet parsing bug crashes and reboots Loytec building controllers.
Is CVE-2026-55732 being exploited?
Not confirmed. CVE-2026-55732 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.32% probability of exploitation in the next 30 days.
How severe is CVE-2026-55732?
CVE-2026-55732 is rated High with a CVSS score of 8.7. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-55732?
Yes. A fix has been recorded for CVE-2026-55732. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-55732 affect?
CVE-2026-55732 affects Loytec LIP-ME201C, L-INX, L-GATE, L-ROC, and 5 further products or versions. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-55732?
Isolate/block BACnet from untrusted networks; apply vendor updates/patch when released.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote unauthenticated OOB read in BACnet parsing crashes linx_a64.exe and reboots device, causing denial of service.
Immediate action required
- affected<= 8.4.18
- affected<= 8.4.18
- affected<= 8.4.18
- affected<= 8.4.18
- affected<= 8.4.18
- affected<= 8.4.18
- affected<= 8.4.18
- affected<= 8.4.18
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.