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Vulnerabilities Resolved in Veeam Agent for Microsoft Windows 5.0.3

CVE-2022-26503

KB ID: 4289
Product: Veeam Agent for Microsoft Windows | 2.0 | 2.1 | 2.2 | 3.0.2 | 4.0 | 5.0
Published: 2022-03-12
Last Modified: 2026-10-29
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Article Modernization
This article describes a vulnerability that was disclosed and fixed in 2022. In 2026, the article was updated to match the current vulnerability announcement layout. No new vulnerabilities are described.
Veeam Software Security Commitment
Veeam® is committed to ensuring its products protect customers from potential risks. As part of that commitment, we operate a Vulnerability Disclosure Program (VDP) for all Veeam products and perform extensive internal code audits. When a vulnerability is identified, our team promptly develops a patch to address and mitigate the risk. In line with our dedication to transparency, we publicly disclose the vulnerability and provide detailed mitigation information. This approach ensures that all potentially affected customers can quickly implement the necessary measures to safeguard their systems. It’s important to note that once a vulnerability and its associated patch are disclosed, attackers will likely attempt to reverse-engineer the patch to exploit unpatched deployments of Veeam software. This reality underscores the critical importance of ensuring that all customers use the latest versions of our software and install all updates and patches without delay.

Issue Details

CVE-2022-26503

A vulnerability in Veeam Agent for Microsoft Windows that allows a local user to escalate privileges and run arbitrary code with LOCAL SYSTEM privileges through deserialization of untrusted data.

Severity: High
CVSS v3.1 Score: 7.8CVSS: AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: Reported by Nikita Petrov (Positive Technologies).

Affected Product
Solution

This vulnerability was fixed starting in the following builds:

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