CVE-2026-55731 PUBLISHED

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

Assigner: NCSC.ch
Reserved: 17.06.2026 Published: 24.07.2026 Updated: 24.07.2026

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.

Metrics

CVSS Vector: 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
CVSS Score: 6.6

Product Status

Vendor Loytec
Product LIP-ME20xC
Versions Default: unaffected
  • affected from 0 to 8.4.16 (incl.)
Vendor Loytec
Product L-INX
Versions Default: unaffected
  • affected from 0 to 8.4.16 (incl.)
Vendor Loytec
Product L-GATE
Versions Default: unaffected
  • affected from 0 to 8.4.16 (incl.)
Vendor Loytec
Product L-ROC
Versions Default: unaffected
  • affected from 0 to 8.4.16 (incl.)
Vendor Loytec
Product L-IOB
Versions Default: unaffected
  • affected from 0 to 8.4.16 (incl.)
Vendor Loytec
Product L-DALI
Versions Default: unaffected
  • affected from 0 to 8.4.16 (incl.)
Vendor Loytec
Product L-VIS
Versions Default: unaffected
  • affected from 0 to 8.4.16 (incl.)
Vendor Loytec
Product L-PAD
Versions Default: unaffected
  • affected from 0 to 8.4.16 (incl.)

Solutions

Upgrade to firmware version 8.4.18.

Credits

  • Daniel Hulliger, armasuisse CYD Campus finder
  • Damian Pfammatter, armasuisse CYD Campus finder

References

Problem Types

  • CWE-606 Unchecked input for loop condition CWE