Medium 6.6Published Jul 24, 2026

CVE-2026-55731Loytec LINX firmware: Unchecked input for loop condition in the SNMP agent

Updated under an hour ago (Oct 27, 2026, 12:30 PM ET)

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It affects Loytec LIP-ME20xC and 7 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Loytec LIP-ME20xC

Exploited in the last 30 days

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.

CVSS: 6.6 MEDIUM (v4.0, CNA)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:U
Weakness (CWE): CWE-606
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: NCSC.ch
NVD analysis: Deferred
Record last updated: Jul 24, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Loytec LIP-ME20xC loytec:lip_me20xc (from the name)	through 8.4.16	CNA record
Loytec L-INX loytec:l_inx (from the name)	through 8.4.16	CNA record
Loytec L-GATE loytec:l_gate (from the name)	through 8.4.16	CNA record
Loytec L-ROC loytec:l_roc (from the name)	through 8.4.16	CNA record
Loytec L-IOB loytec:l_iob (from the name)	through 8.4.16	CNA record
Loytec L-DALI loytec:l_dali (from the name)	through 8.4.16	CNA record
Loytec L-VIS loytec:l_vis (from the name)	through 8.4.16	CNA record
Loytec L-PAD loytec:l_pad (from the name)	through 8.4.16	CNA record

References

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	vendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.