Loytec LINX firmware: Unchecked input for loop condition in the SNMP agent

published 2026-07-24 3mo ago modified 2026-07-27 3mo ago also EUVD-2026-48596

cvss: 6.6; version 4.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.5%; EPSS 0.5% chance of exploitation in 30 days, percentile 46%
public exploits: 0; none known

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.

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CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: partial
Assessed: 3mo ago (2026-07-24)

Exploit prediction

0.54% chance of exploitation in the next 30 days, higher than 46% of all scored CVEs (FIRST EPSS, 2026-11-11).

CVSS scores

assigned by	version	score	vector
CNA	4.0	6.6	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
CNA	4.0	6.6	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/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

Affected products

Loytec LIP-ME20xC
Loytec L-INX
Loytec L-GATE
Loytec L-ROC
Loytec L-IOB
Loytec L-DALI
Loytec L-VIS
Loytec L-PAD

Classification

Weakness

CWE-606 Unchecked Input for Loop Condition

References

loytec.com /support/product-security/advisories/8531-dibt-cve-20260601-0003-unchecked-input-for-loop-condition-cwe-606-in
vendor-advisory

Sources

CVE List CVE-2026-55731
NVD CVE-2026-55731

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