Security readout for executives and security teams
Plain-English summary
CVE-2021-44204 is a local privilege escalation issue in several Windows Acronis backup and security products. A user or process already on the machine could gain higher privileges through improper named-pipe access control. It is not described as remote initial access, but it matters on endpoints because backup agents often run with high privileges.
Executive priority
Treat this as a medium-priority endpoint hardening issue unless vulnerable Acronis software is widespread on privileged servers. It is not sourced as actively exploited, but it can increase attacker impact after local foothold.
Technical view
The CVE describes CWE-285 improper authorization in Windows Acronis components. A named-pipe access-control weakness can allow local privilege escalation. Affected builds are Acronis Cyber Protect 15 before 28035, Acronis Agent before 27147, Cyber Protect Home Office before 39612, and True Image 2021 before 39287.
Likely exposure
Exposure is limited to Windows systems running the listed Acronis products below the fixed builds. Servers, workstations, and backup-managed endpoints are the likely inventory targets. Non-Windows installations are not listed in the provided sources.
Exploitation context
The source bundle does not show CISA KEV listing, active exploitation, exploit maturity, or public exploit details. The vulnerability requires local access according to the CVE description, so business risk is mainly post-compromise privilege escalation on systems with vulnerable Acronis software.
Researcher notes
Evidence is sparse: no CVSS vector, severity score, or exploit status is provided in the bundle. The key technical facts are local privilege escalation, named-pipe access control, CWE-285, Windows scope, and vendor build thresholds.
Mitigation direction
- Upgrade Acronis Cyber Protect 15 to build 28035 or later.
- Upgrade Acronis Agent for Windows to build 27147 or later.
- Upgrade Cyber Protect Home Office to build 39612 or later.
- Upgrade Acronis True Image 2021 to build 39287 or later.
- Check the Acronis advisory for product-specific guidance.
Validation and detection
- Inventory Windows endpoints and servers for installed Acronis products.
- Record installed Acronis build numbers and compare with affected thresholds.
- Prioritize systems where Acronis services run with elevated privileges.
- Confirm no listed vulnerable builds remain after upgrades.
- Review vendor advisory updates before closing remediation.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-285: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupPrivilege behavior lookup
The CVE wording references privilege impact, so privilege escalation and authorization behavior review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-44204 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://security-advisory.acronis.com/advisories/SEC-2355CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Authorization
Improper Authorization represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.