CVE-2025-30416: 
Acronis Cyber Protect vulnerability analysis and mitigation

CVE-2025-30416 is a missing authorization vulnerability in Acronis Cyber Protect that allows unauthenticated remote attackers to disclose sensitive data and manipulate system configurations. It affects Acronis Cyber Protect 16 (Linux, Windows) before build 39938 and Acronis Cyber Protect 15 (Linux, Windows) before build 41800. The vulnerability was published on February 20, 2026, with a patch advisory released by Acronis. It carries a CVSS v3.0 base score of 10.0 (Critical) (Acronis Advisory, Red Hat CVE).

The root cause is classified as CWE-862 (Missing Authorization), meaning the software fails to perform adequate authorization checks before granting access to sensitive functionality or data. An unauthenticated attacker can exploit this over the network with no user interaction required and no special privileges, making it trivially exploitable in internet-facing deployments. The vulnerability's scope is marked as "Changed," indicating that a successful exploit can impact resources beyond the vulnerable component itself. No public proof-of-concept or detailed technical write-up has been identified at this time (Acronis Advisory).

Successful exploitation grants an unauthenticated remote attacker full access to sensitive data (high confidentiality impact), the ability to modify protected data and system configurations (high integrity impact), and the potential to disrupt service availability (high availability impact). Because the scope is marked as "Changed," the blast radius extends beyond the Acronis Cyber Protect instance itself, potentially enabling lateral movement within the protected environment. Given that Acronis Cyber Protect manages backup, recovery, and endpoint security functions, compromise could expose backup data, credentials, and security policy configurations across all managed endpoints (Acronis Advisory).

As of the time of reporting, there is no public proof-of-concept exploit and no confirmed evidence of in-the-wild exploitation (Acronis Advisory). The EPSS score is approximately 0.013% (0.000130), indicating a currently low probability of exploitation in the near term. No threat actor attribution has been reported, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog. However, the critical CVSS score of 10.0 and the unauthenticated, network-accessible attack vector make this a high-priority patching target.

Acronis has released patches addressing this vulnerability. Users should update to the following builds immediately:

• Acronis Cyber Protect 16: Build 39938 or later
• Acronis Cyber Protect 15: Build 41800 or later

As interim measures, administrators should implement network segmentation to restrict access to Acronis Cyber Protect management interfaces, enforce firewall rules to limit exposure to trusted networks only, and review access logs for signs of unauthorized access. Upgrading to the patched builds is the only definitive remediation (Acronis Advisory).

The vulnerability received coverage from security news outlets including Heise and community forums such as MalwareTips, noting the critical severity of multiple flaws in Acronis Cyber Protect (Heise). Social media discussion was observed on Mastodon and Bluesky via The Hacker Wire, highlighting the unauthenticated nature of the flaw. Community sentiment reflects concern given the 10.0 CVSS score, though the absence of a public PoC has tempered urgency somewhat.