CVE-2026-28722
Acronis Cyber Protect ≤ 17.0.41186
Raw vector
CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:HSummary
CVE-2026-28722 is a high-severity Externally Controlled Reference to a Resource in Another Sphere (CWE-610) vulnerability in Acronis Cyber Protect. Its CVSS base score is 7.3 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked at the 5th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified map to AC-6 (Least Privilege) and SI-2 (Flaw Remediation) — see the control section below for these in your framework.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-9957
Vulnerability Data
Local privilege escalation due to improper soft link handling. The following products are affected: Acronis Cyber Protect 17 (Windows) before build 41186.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Local privilege escalation vulnerability via improper symlink handling directly maps to exploitation for privilege escalation.
CVEs Like This One
Affected Assets
Mitigating Controls
Control response
Mitigating Controls (NIST 800-53 r5) AI
Directly requires patching the improper symlink handling flaw in Acronis Cyber Protect before it can be exploited for local privilege escalation.
Limits the privileges under which the affected service runs, reducing the impact of any successful symlink-based escalation.
Requires validation of file paths and references to block externally controlled symbolic links that lead to unauthorized resource access.
Mitigating Controls (NIST CSF 2.0) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.
Secure development practices directly require input validation and reference sanitization that prevent externally-controlled resource references.
Runtime monitoring of software and data flows can detect anomalous external resource accesses that result from this weakness.
Network segmentation and access controls limit the blast radius when an external reference escapes its intended sphere.
Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.
Security testing can detect instances of the weakness but does not prevent it at design or coding time.
Secure development lifecycle mandates validation of all external references to prevent uncontrolled resource access.
Application security requirements explicitly call for controls against externally supplied resource identifiers.
Secure architecture principles reduce the attack surface for externally controlled references but do not prescribe specific validation rules.
Secure coding standards require input validation and canonicalization to block externally controlled resource references.
Information access restriction limits what resources can be reached, indirectly reducing impact of external references.