Acronis Cyber Protect Cloud Agent: Use of Default Credentials
CVE-2026-28713 is a high-severity use of default credentials vulnerability in Acronis Cyber Protect Cloud Agent from Acronis, with a CVSS 3.0 base score of 7.1 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, but only if a user takes part, for example by opening a link or file. The record lists version 36943 as the first without the flaw, so updating Acronis Cyber Protect Cloud Agent to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.2% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update Acronis Cyber Protect Cloud Agent to 36943 or a later version.
- Update Acronis Cyber Protect 17 to 41186 or a later version.
- Update Agent to c23.12 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.
- Because the attack needs a user to take part, warn users about unexpected links and files related to this product until it is patched.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Acronis | Acronis Cyber Protect Cloud Agent | before 36943 | 36943 |
| Acronis | Acronis Cyber Protect 17 | before 41186 | 41186 |
| Acronis | Agent | before c23.12 | c23.12 |
| 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
- HighSuccess depends on conditions outside the attacker's control.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- RequiredA user must take an action such as opening a file or link.
- 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
- LowPerformance or availability is reduced.
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:L. Scored by CNA (acronis.com).
Official description
Default credentials set for local privileged user in Virtual Appliance. The following products are affected: Acronis Cyber Protect Cloud Agent (VMware) before build 36943, Acronis Cyber Protect 17 (VMware) before build 41186.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Use of Default Credentials
The product uses default credentials (such as passwords or cryptographic keys) for potentially critical functionality.
How developers prevent this class of flaw
- Prohibit use of default, hard-coded, or other values that do not vary for each installation of the product - especially for separate organizations.
- Force the administrator to change the credential upon installation.
- The product administrator could change the defaults upon installation or during operation.
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 Cloud Agent
- 7.1 High severity
- 7.8 High severity
- 7.8 High severity
- 7.8 High severity
- 7.3 High severity
- 7.1 High severity
Recent Use of Default Credentials vulnerabilities
- 9.8 Critical severity
- 9.8 Critical severity
- 9.8 Critical severity
- 8.4 High severity
- 7.5 High severity
- 8.1 High severity
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