How severe is CVE-2026-55731?

CVE-2026-55731 has a CVSS 4.0 base score of 6.6, rated medium severity.

Is CVE-2026-55731 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-55731?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2026-55731 published?

CVE-2026-55731 was published on 2026-07-24 and last updated on 2026-07-27.

CVE-2026-55731

CVE-2026-55731 is a medium-severity vulnerability with a CVSS 4.0 base score of 6.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-606.

Key facts

Severity: Medium (CVSS 4.0 base score 6.6)
EPSS exploit prediction: 0% (25th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-606
Published: 2026-07-24
Last modified: 2026-07-27

Description

Unchecked input for loop condition (CWE-606) in the SNMP agent in Loytec LIP-ME201C, L-INX, L-GATE, L-ROC, L-IOB, L-DALI, L-VIS and L-PAD through 8.4.16 on LINX-A64 allows an unauthenticated remote attacker to cause persistent denial of service (CPU exhaustion) via a crafted SNMP GETNEXT request with a large OID component.

Frequently asked questions

What is CVE-2026-55731?: Unchecked input for loop condition (CWE-606) in the SNMP agent in Loytec LIP-ME201C, L-INX, L-GATE, L-ROC, L-IOB, L-DALI, L-VIS and L-PAD through 8.4.16 on LINX-A64 allows an unauthenticated remote attacker to cause persistent denial of service (CPU exhaustion) via a crafted SNMP GETNEXT request with a large OID component.
How severe is CVE-2026-55731?: CVE-2026-55731 has a CVSS 4.0 base score of 6.6, rated medium severity.
Is CVE-2026-55731 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-55731?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2026-55731 published?: CVE-2026-55731 was published on 2026-07-24 and last updated on 2026-07-27.

References

https://www.loytec.com/support/product-security/advisories/8531-dibt-cve-20260601-0003-unchecked-input-for-loop-condition-cwe-606-in-the-snmp-agent-medium

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