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remote code execution Veeam
Backup CVE CVE exploits CVE vulnerability Cyber Security Domain Flaws Ransomware Gangs Ransomwares remote code execution Veeam

Veeam Fixes Critical Remote Code Execution Bug in Backup & Replication Software

 

Veeam has issued new security patches to address multiple vulnerabilities in its Backup & Replication (VBR) software, including a severe remote code execution (RCE) flaw. Identified as CVE-2025-23121, this particular vulnerability was uncovered by researchers from watchTowr and CodeWhite and impacts only installations that are connected to a domain. 

According to Veeam’s advisory released on Tuesday, the vulnerability can be exploited by any authenticated domain user to execute code remotely on the backup server. The flaw requires minimal attack complexity and affects versions of Veeam Backup & Replication 12 and later. The issue has been resolved in version 12.3.2.3617, made available earlier today. 

Although the vulnerability is confined to domain-joined setups, it poses a significant risk due to the ease with which domain users can leverage it. Alarmingly, many organizations have connected their backup servers to Windows domains, going against Veeam’s own security recommendations. These guidelines suggest using a separate Active Directory Forest for backups and enforcing two-factor authentication on administrative accounts to reduce exposure. 

This is not the first time a serious RCE flaw has been found in Veeam’s software. In March 2025, another vulnerability (CVE-2025-23120) was patched that similarly affected domain-joined installations. Earlier, in September 2024, another VBR vulnerability (CVE-2024-40711) was exploited in the wild, eventually being used to deliver the Frag ransomware. That same flaw was later linked to Akira and Fog ransomware attacks starting in October. Cybercriminals have increasingly targeted Veeam Backup & Replication servers as part of their ransomware campaigns. 

These systems often store critical backups, making them ideal targets for attackers looking to maximize damage. Ransomware operators frequently aim to disable these systems before launching full-scale attacks, making recovery more difficult for the victim. Historically, ransomware groups such as Cuba, as well as financially motivated actors like FIN7—known for collaborating with major ransomware operations like REvil, Maze, Conti, and BlackBasta—have been seen exploiting VBR vulnerabilities. 

With over 550,000 organizations relying on Veeam’s solutions globally, including the majority of Fortune 500 companies and most of the Global 2000, the potential impact of such flaws is significant. These repeated discoveries of critical vulnerabilities highlight the urgent need for enterprises to follow recommended configurations and keep their backup software up to date.
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zero data
Backup commvault Cyber Attacks Data Microsoft zero data

Commvault Confirms Cyberattack, Says Customer Backup Data Remains Secure


Commvault, a well-known company that helps other businesses protect and manage their digital data, recently shared that it had experienced a cyberattack. However, the company clarified that none of the backup data it stores for customers was accessed or harmed during the incident.

The breach was discovered in February 2025 after Microsoft alerted Commvault about suspicious activity taking place in its Azure cloud services. After being notified, the company began investigating the issue and found that a very small group of customers had been affected. Importantly, Commvault stated that its systems remained up and running, and there was no major impact on its day-to-day operations.

Danielle Sheer, Commvault’s Chief Trust Officer, said the company is confident that hackers were not able to view or steal customer backup data. She also confirmed that Commvault is cooperating with government cybersecurity teams, including the FBI and CISA, and is receiving support from two independent cybersecurity firms.


Details About the Vulnerability

It was discovered that the attackers gained access by using a weakness in Commvault’s web server software. This flaw, now fixed, allowed hackers with limited permissions to install harmful software on affected systems. The vulnerability, known by the code CVE-2025-3928, had not been known or patched before the breach, making it what experts call a “zero-day” issue.

Because of the seriousness of this bug, CISA (Cybersecurity and Infrastructure Security Agency) added it to a list of known risks that hackers are actively exploiting. U.S. federal agencies have been instructed to update their Commvault software and fix the issue by May 19, 2025.


Steps Recommended to Stay Safe

To help customers stay protected, Commvault suggested the following steps:

• Use conditional access controls for all cloud-based apps linked to Microsoft services.

• Check sign-in logs often to see if anyone is trying to log in from suspicious locations.

• Update secret access credentials between Commvault and Azure every three months.


The company urged users to report any strange behavior right away so its support team can act quickly to reduce any damage.

Although this was a serious incident, Commvault’s response was quick and effective. No backup data was stolen, and the affected software has been patched. This event is a reminder to all businesses to regularly check for vulnerabilities and keep their systems up to date to prevent future attacks.

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Vulnerabilities
Automation Backup Cyber Security Exploits Infrastructure Vulnerabilities

CISA Highlights Major Vulnerabilities in Critical Infrastructure Systems

 

The Cybersecurity and Infrastructure Security Agency (CISA) has released two significant advisories focused on Industrial Control Systems (ICS), urging swift action from organizations operating within vital infrastructure sectors. These advisories—ICSA-25-091-01 and ICSA-24-331-04—highlight newly discovered vulnerabilities that could pose severe threats if left unaddressed.

ICSA-25-091-01 focuses on a critical vulnerability affecting Rockwell Automation's Lifecycle Services, which integrate with Veeam Backup and Replication. This issue stems from improper deserialization of untrusted data (CWE-502)—a known risk that allows remote attackers to execute malicious code. The flaw has received a CVSS v4 score of 9.4, indicating a high-severity, low-complexity threat that is remotely exploitable.

Impacted products include:

  • Industrial Data Center (IDC) with Veeam (Generations 1-5)
  • VersaVirtual Appliance (VVA) with Veeam (Series A-C)
If exploited, the vulnerability could give attackers with admin rights full access to execute arbitrary code, potentially leading to complete system takeover.

"CISA urges organizations to take immediate defensive measures to mitigate the risk, including:
• Minimizing network exposure for all control systems and ensuring they are not directly accessible from the internet.
• Using secure access methods like Virtual Private Networks (VPNs) when remote access is necessary.
• Keeping VPNs up to date to prevent vulnerabilities from being exploited."

Rockwell Automation is collaborating with CISA to inform affected clients—especially those under Infrastructure Managed Service contracts—about available patches and remediation steps.

ICSA-24-331-04 draws attention to multiple security flaws in Hitachi Energy’s MicroSCADA Pro/X SYS600, a system widely used in energy and manufacturing sectors. These vulnerabilities include improper query logic handling, session hijacking via authentication bypass, and path traversal risks.

The most critical issue, CVE-2024-4872, carries a CVSS v3 score of 9.9, making it one of the most severe. It enables attackers with valid credentials to inject harmful code into the system, risking unauthorized access and corruption of persistent data.

Other issues include:
  • CVE-2024-3980: Lack of proper file path limitations
  • Exposure to further system compromise if not promptly patched
"Hitachi Energy has released patches for the affected versions, including a critical update to Version 10.6 for MicroSCADA Pro/X SYS600. Users are also advised to apply necessary workarounds and stay updated with security patches to protect against exploitation."

CISA strongly advises organizations using these systems to implement all recommended mitigations without delay to minimize potential risks.
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