CyberSecBulletin
CVE-2025-48963NVD status: Deferred

Acronis Cyber Protect Cloud Agent: Externally Controlled Reference to a Resource in Another Sphere

Published Updated By the CyberSecBulletin desk

CVE-2025-48963 is a high-severity externally controlled reference to a resource in another sphere vulnerability in Acronis Cyber Protect Cloud Agent from Acronis, with a CVSS 3.0 base score of 7.3 out of 10. It can be exploited with local access to the system by an attacker with a low-privileged account, but only if a user takes part, for example by opening a link or file. The record lists version 40296 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 0.14% chance of exploitation within 30 days, which is low compared with other CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Update Acronis Cyber Protect Cloud Agent to 40296 or a later version.
  2. Read the advisory on security-advisory.acronis.com for workarounds and exact fixed builds.
  3. 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

VendorProductAffected versionsFixed in
AcronisAcronis Cyber Protect Cloud Agentbefore 4029640296

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
LocalThe attacker needs local access or must trick a user into running something.
Attack complexity
LowNo special conditions are needed; the attack works reliably.
Privileges required
LowA basic user account is enough.
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
HighThe component can be taken down completely.

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H. Scored by CNA (acronis.com).

Official description

Local privilege escalation due to improper soft link handling. The following products are affected: Acronis Cyber Protect Cloud Agent (Linux, macOS, Windows) before build 40296.

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Externally Controlled Reference to a Resource in Another Sphere

The product uses an externally controlled name or reference that resolves to a resource that is outside of the intended control sphere.

More Externally Controlled Reference to a Resource in Another Sphere vulnerabilities (CWE-610)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
  3. Record last changed materially (score, affected products, status or references).

References

Other vulnerabilities in Acronis Cyber Protect Cloud Agent

All Acronis Cyber Protect Cloud Agent vulnerabilities

Recent Externally Controlled Reference to a Resource in Another Sphere vulnerabilities

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