CyberSecBulletin
CVE-2025-30415NVD status: Deferred

Acronis Cyber Protect Cloud Agent: Improper Validation of Syntactic Correctness of Input

Published Updated By the CyberSecBulletin desk

CVE-2025-30415 is a high-severity improper validation of syntactic correctness of input vulnerability in Acronis Cyber Protect Cloud Agent from Acronis, with a CVSS 3.0 base score of 7.5 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 40077 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 0.39% 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 40077 or a later version.
  2. Update Acronis Cyber Protect 17 to 41186 or a later version.
  3. Read the advisory on security-advisory.acronis.com for workarounds and exact fixed builds.
  4. Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.

Affected products and versions

VendorProductAffected versionsFixed in
AcronisAcronis Cyber Protect Cloud Agentbefore 4007740077
AcronisAcronis Cyber Protect 17before 4118641186

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
NoneNo data is disclosed.
Integrity
NoneNothing can be modified.
Availability
HighThe component can be taken down completely.

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

Official description

Denial of service due to improper handling of malformed input. The following products are affected: Acronis Cyber Protect Cloud Agent (Linux, macOS, Windows) before build 40077, Acronis Cyber Protect 17 (Linux, macOS, Windows) before build 41186.

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

The underlying weakness: Improper Validation of Syntactic Correctness of Input

The product receives input that is expected to be well-formed - i.e., to comply with a certain syntax - but it does not validate or incorrectly validates that the input complies with the syntax.

More Improper Validation of Syntactic Correctness of Input vulnerabilities (CWE-1286)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: none, automatable: yes, technical impact: partial).
  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 Improper Validation of Syntactic Correctness of Input vulnerabilities

Spotted an error? Tell us.