Acronis Cyber Protect 17: Weak Authentication
CVE-2026-28710 is a critical-severity weak authentication vulnerability in Acronis Cyber Protect 17 from Acronis, with a CVSS 3.1 base score of 9.8 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. The record lists version 41186 as the first without the flaw, so updating Acronis Cyber Protect 17 to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.47% chance of exploitation within 30 days, which is low compared with other CVEs.
Critical severity: a successful attack would have severe impact.
What to do
- Update Acronis Cyber Protect 17 to 41186 or a later version.
- Update Cyber Protect to 17.0.41186 or a later version.
- Read the advisory on security-advisory.acronis.com for workarounds and exact fixed builds.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Acronis | Acronis Cyber Protect 17 | before 41186 | 41186 |
| Acronis | Cyber Protect | before 17.0.41186 | 17.0.41186 |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 9.8 | Critical | NVD |
| CVSS 3.0 | 8.1 | High | CNA (acronis.com) |
Official description
Sensitive information disclosure and manipulation due to improper authentication. The following products are affected: Acronis Cyber Protect 17 (Linux, Windows) before build 41186.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Weak Authentication
The product uses an authentication mechanism to restrict access to specific users or identities, but the mechanism does not sufficiently prove that the claimed identity is correct.
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Other vulnerabilities in Acronis Cyber Protect 17
- 7.4 High severity
- 7.4 High severity
- 7.1 High severity
- 7.8 High severity
- 7.3 High severity
- 7.3 High severity
Recent Weak Authentication vulnerabilities
- 10.0 Critical severity
- 10.0 Critical severity
- 7.5 High severity
- 9.8 Critical severity
- 9.8 Critical severity
- 9.8 Critical severity
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