CVE-2026-27668
Published: 14 April 2026
Summary
CVE-2026-27668 is a high-severity Incorrect Privilege Assignment (CWE-266) vulnerability. Its CVSS base score is 8.7 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked at the 17.0th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified are NIST 800-53 AC-3 (Access Enforcement) and AC-5 (Separation of Duties).
Deeper analysis
CVE-2026-27668, published on 2026-04-14, is a vulnerability in RUGGEDCOM CROSSBOW Secure Access Manager Primary (SAM-P), affecting all versions prior to V5.8. The issue arises because User Administrators are permitted to administer groups they belong to, violating proper access controls (CWE-266). This flaw has a CVSS v3.1 base score of 8.8 (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H), indicating high severity due to its potential for significant confidentiality, integrity, and availability impacts.
An attacker with low-privilege authenticated access as a User Administrator can exploit this vulnerability remotely over the network with low complexity and no user interaction required. By leveraging the ability to self-administer their group, the attacker can escalate their own privileges, granting themselves access to any device group at any access level.
The Siemens security advisory at https://cert-portal.siemens.com/productcert/html/ssa-741509.html details the vulnerability and recommends updating to SAM-P version V5.8 or later to mitigate the issue, as all prior versions remain vulnerable.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-22237
Vulnerability details
A vulnerability has been identified in RUGGEDCOM CROSSBOW Secure Access Manager Primary (SAM-P) (All versions < V5.8). User Administrators are allowed to administer groups they belong to. This could allow an authenticated User Administrator to escalate their own privileges and…
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grant themselves access to any device group at any access level.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
The CVE describes a remote authenticated logic flaw (CWE-266) in a public-facing access management application that allows a low-privileged User Administrator to modify group memberships/permissions they should not control, directly enabling privilege escalation to arbitrary device groups. This maps to T1190 (remote exploitation of exposed app), T1068 (exploitation for privilege escalation), and T1098 (account/group manipulation to achieve the escalation).
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Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Requires enforcement of approved authorizations, directly preventing User Administrators from administering their own groups and escalating privileges.
Enforces least privilege principle, blocking self-escalation by limiting User Administrators to only necessary access without ability to grant themselves higher privileges.
Implements separation of duties to prohibit a single user from both belonging to and administering the same group, mitigating the privilege escalation vulnerability.