# CVE-2026-28709: Missing authorization in Acronis Cyber Protect 17

> Attackers can manipulate resources without proper authorization in Acronis Cyber Protect, requiring an upgrade to the latest build.

- **Severity:** Medium 4.3 (`CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 5 Mar 2026
- **Updated:** 6 Mar 2026
- **Also known as:** GHSA-226g-qx73-56w6

## What is CVE-2026-28709?

CVE-2026-28709 is a medium-severity missing authorization vulnerability in Acronis Cyber Protect, published on 5 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Unauthorized resource manipulation due to improper authorization checks. The following products are affected: Acronis Cyber Protect 17 (Linux, Windows) before build 41186.

Weakness: CWE-863 (Incorrect Authorization)

## Which versions are affected by CVE-2026-28709?

It affects 1 product.


Products: Acronis Cyber Protect.

## How do I fix CVE-2026-28709?

No fix has been published for CVE-2026-28709 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-28709 being exploited?

There is no known exploitation of CVE-2026-28709 in the wild and no public exploit code.

## Other vulnerabilities in Acronis Cyber Protect

- [CVE-2025-30411](https://insights.sbomify.com/CVE-2025-30411/): Auth bypass in Acronis Cyber Protect 15 (critical 10.0)
- [CVE-2025-30412](https://insights.sbomify.com/CVE-2025-30412/): Auth bypass in Acronis Cyber Protect 15 (critical 10.0)
- [CVE-2025-30416](https://insights.sbomify.com/CVE-2025-30416/): Missing authorization in Acronis Cyber Protect 15 (critical 10.0)
- [CVE-2026-28710](https://insights.sbomify.com/CVE-2026-28710/): Auth bypass in Acronis Cyber Protect 17 (high 8.1)
- [CVE-2021-44198](https://insights.sbomify.com/CVE-2021-44198/): DLL hijacking could lead to local privilege escalation (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-28709 and fix it if it is affected.

What it is: CVE-2026-28709 is a medium-severity missing authorization vulnerability in Acronis Cyber Protect, published on 5 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-28709 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-2026-28709/ (Markdown: https://insights.sbomify.com/CVE-2026-28709/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-28709
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-28709
- OSV: https://osv.dev/vulnerability/CVE-2026-28709

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-28709/
Summaries are generated and may contain mistakes; the official description above is the record.