# CVE-2026-28727: Privilege escalation in Acronis Cyber Protect 17

> Local attackers can escalate privileges via insecure Unix socket permissions in Acronis backup software on macOS.

- **Severity:** High 7.8 (`CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 5 Mar 2026
- **Updated:** 2 Apr 2026
- **Also known as:** GHSA-2qwf-43v4-fqqq

## What is CVE-2026-28727?

CVE-2026-28727 is a high-severity vulnerability in Acronis Cyber Protect, published on 5 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Local privilege escalation due to insecure Unix socket permissions. The following products are affected: Acronis Cyber Protect 17 (macOS) before build 41186, Acronis Cyber Protect Cloud Agent (macOS) before build 41124, Acronis True Image (macOS) before build 42902.

Weakness: CWE-276 (Incorrect Default Permissions)

## Which versions are affected by CVE-2026-28727?

It affects 2 products.


Products: Acronis Agent, Acronis Cyber Protect.

## How do I fix CVE-2026-28727?

No fix has been published for CVE-2026-28727 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-28727 being exploited?

There is no known exploitation of CVE-2026-28727 in the wild and no public exploit code.

## Other vulnerabilities in Acronis Cyber Protect

- [CVE-2022-45451](https://insights.sbomify.com/CVE-2022-45451/): Privilege escalation in Acronis Agent (high 8.8)
- [CVE-2023-41743](https://insights.sbomify.com/CVE-2023-41743/): Privilege escalation in Acronis Cyber Protect 15 (high 8.8)
- [CVE-2023-41744](https://insights.sbomify.com/CVE-2023-41744/): Privilege escalation in Acronis Agent (high 7.8)
- [CVE-2021-44204](https://insights.sbomify.com/CVE-2021-44204/): Local privilege escalation via named pipe due to improper access control checks (high 7.8)
- [CVE-2022-24113](https://insights.sbomify.com/CVE-2022-24113/): Local privilege escalation due to excessive permissions assigned to child processes (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-28727 and fix it if it is affected.

What it is: CVE-2026-28727 is a high-severity vulnerability in Acronis Cyber Protect, published on 5 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-28727 in the wild and no public exploit code.

Affected product: Acronis Cyber Protect. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-28727/ (Markdown: https://insights.sbomify.com/CVE-2026-28727/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-28727
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-28727
- OSV: https://osv.dev/vulnerability/CVE-2026-28727

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-28727/
Summaries are generated and may contain mistakes; the official description above is the record.