Weak MAC Algorithms in SSH Service Affecting SICK Devices
CVE-2026-1627

6.5MEDIUM

Key Information:

Vendor

Sick Ag

Status
Sick Lms1000
Sick Mrs1000
Vendor
CVE Published:
27 February 2026

What is CVE-2026-1627?

The vulnerability arises from the use of outdated and weak MAC (Message Authentication Code) algorithms in the SSH (Secure Shell) service of SICK devices. If an attacker can access the network traffic, they may exploit this weakness to compromise the integrity of SSH sessions. This exploitation could potentially allow manipulation of the data transmitted within the SSH session, raising significant security concerns for users relying on secure communications.

Affected Version(s)

SICK LMS1000 0

SICK MRS1000 0

References

https://sick.com/psirt
x_SICK PSIRT Security Advisories
https://www.sick.com/media/docs/9/19/719/special_informat...
x_SICK Operating Guidelines
https://www.cisa.gov/resources-tools/resources/ics-recomm...
x_ICS-CERT recommended practices on Industrial Security

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.