Loytec LIP-ME20xC up to 8.4.16 SNMP Agent unchecked input for loop condition

CVSS Meta Temp Score
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CTI Interest Score
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7.5$0-$5k2.35-

Summaryinfo

A vulnerability has been found in Loytec LIP-ME20xC, L-INX, L-GATE, L-ROC, L-IOB, L-DALI, L-VIS and L-PAD up to 8.4.16 and classified as critical. The impacted element is an unknown function of the component SNMP Agent. Performing a manipulation results in unchecked input for loop condition. This vulnerability is reported as CVE-2026-55731. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability, which was classified as critical, was found in Loytec LIP-ME20xC, L-INX, L-GATE, L-ROC, L-IOB, L-DALI, L-VIS and L-PAD up to 8.4.16. This affects an unknown part of the component SNMP Agent. The manipulation with an unknown input leads to a unchecked input for loop condition vulnerability. CWE is classifying the issue as CWE-606. The product does not properly check inputs that are used for loop conditions, potentially leading to a denial of service or other consequences because of excessive looping. This is going to have an impact on availability. The summary by CVE is:

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.

The advisory is shared at loytec.com. This vulnerability is uniquely identified as CVE-2026-55731 since 06/17/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1449 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.5

VulDB Base Score: 7.5
VulDB Temp Score: 7.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Unchecked input for loop condition
CWE: CWE-606 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

06/17/2026 CVE reserved
07/24/2026 +37 days Advisory disclosed
07/24/2026 +0 days VulDB entry created
07/24/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: loytec.com
Status: Not defined

CVE: CVE-2026-55731 (🔒)
GCVE (CVE): GCVE-0-2026-55731
GCVE (VulDB): GCVE-100-382917

Entryinfo

Created: 07/24/2026 16:41
Changes: 07/24/2026 16:41 (52)
Complete: 🔍
Cache ID: 216::103

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