Quick answers
- Is CVE-2026-55731 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-55731 being exploited in the wild.
- How severe is CVE-2026-55731?
- Informational severity, with a CVSS score of 6.6, published 24 July 2026.
- Which products and versions are affected?
- LOYTEC L-DALI through 8.4.16; LOYTEC L-GATE through 8.4.16; LOYTEC L-INX through 8.4.16; LOYTEC L-IOB through 8.4.16; and 4 more.
- Is there a fix for CVE-2026-55731?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-55731 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-55731?
- Check whether you run LOYTEC L-DALI, LOYTEC L-GATE, LOYTEC L-INX or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
A vulnerability classified as CWE-606 (Unchecked Input for Loop Condition) exists in the SNMP agent of Loytec firmware through version 8.4.16 on LINX-A64 platforms. The flaw is triggered by a crafted SNMP GETNEXT request containing a large OID component. Because the agent does not properly validate the input used in loop conditions, processing the request leads to CPU exhaustion. This allows a remote, unauthenticated attacker to cause a persistent denial of service. The issue is resolved in firmware version 8.4.18.
Affected products
- Loytec LIP-ME201C through 8.4.16
- Loytec L-INX through 8.4.16
- Loytec L-GATE through 8.4.16
- Loytec L-ROC through 8.4.16
- Loytec L-IOB through 8.4.16
- Loytec L-DALI through 8.4.16
- Loytec L-VIS through 8.4.16
- Loytec L-PAD through 8.4.16
Timeline
- 2026-07-24: advisory
- 2026-07-24: disclosed