CVE-2026-1627
Published: 27 February 2026
Summary
CVE-2026-1627 is a medium-severity Use of a Broken or Risky Cryptographic Algorithm (CWE-327) vulnerability in Sick Lms1000 Firmware. Its CVSS base score is 6.5 (Medium).
Operationally, exploitation aligns with the MITRE ATT&CK technique Adversary-in-the-Middle (T1557); ranked at the 6.1th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
Threat & Defense at a Glance
Threat & Defense Details
Likely Mitigating ControlsAI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Contacts with security groups provide timely information on broken or risky cryptographic algorithms, reducing the likelihood of their selection and use.
Ongoing education and sharing of recommended practices helps organizations identify and migrate away from broken or risky cryptographic algorithms.
Cross-organization threat feeds commonly include advances in cryptanalysis and active exploits against weak or broken algorithms, allowing organizations to deprecate them proactively.
Capital planning and funding allow selection and ongoing support of strong cryptographic algorithms rather than weak or broken ones.
Risk updates surface newly-broken or risky cryptographic algorithms as threat intelligence and computing advances evolve, enabling timely replacement.
Scanners flag use of broken or weak cryptographic algorithms via known-vulnerability databases.
Enforces approved cryptographic algorithms for each use case, blocking use of broken or risky algorithms.
Flaw remediation replaces broken or risky cryptographic algorithms once safer implementations are released by vendors.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Weak MACs in SSH directly enable undetected manipulation of data in transit (T1565.002) after an adversary positions for traffic interaction (T1557).
NVD Description
An attacker may exploit the use of outdated and weak MAC algorithms in the device’s SSH service to potentially compromise the integrity of the SSH session, allowing manipulation of transmitted data if the attacker can interact with the network traffic.
Deeper analysisAI
CVE-2026-1627 involves the use of outdated and weak Message Authentication Code (MAC) algorithms in the SSH service of SICK devices, as detailed in CWE-327 (Broken or Risky Cryptographic Algorithm). This vulnerability enables potential compromise of SSH session integrity, allowing manipulation of transmitted data when an attacker interacts with network traffic. Published on 2026-02-27, it carries a CVSS v3.1 base score of 6.5 (AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N).
Attackers can exploit this over the network with low attack complexity and no privileges, though it requires user interaction. Positioned to interact with network traffic, they can manipulate data in transit during SSH sessions, resulting in high integrity impact without compromising confidentiality or availability.
SICK advisories, accessible via their PSIRT page at https://sick.com/psirt and CSAF provider documents including https://www.sick.com/.well-known/csaf/white/2026/sca-2026-0005.json and https://www.sick.com/.well-known/csaf/white/2026/sca-2026-0005.pdf, address mitigation. CISA's ICS recommended practices at https://www.cisa.gov/resources-tools/resources/ics-recommended-practices offer further guidance.
Details
- CWE(s)