Live › vulnerability › CVE-2021-27876
Go to dashboardVeritas Backup Exec Agent has a file access flaw that lets an attacker craft parameters on a data management protocol command to read files on the agent machine. CISA lists it as actively exploited, and the tags include ransomware use.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-23 19:11 UTC, 3h before NVD. All times on this page are UTC.
Apply updates per vendor instructions.
| Product | Ecosystem | Affected | Fixed in |
|---|---|---|---|
| Veritas Backup Exec Agent | vendor | – | – |
| veritas backup exec | vendor | < 21.2 | 21.2 |
Unknown from the sources.
Apply the vendor updates per Veritas instructions (CISA required action); exact fixed version unknown from sources.
Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
An issue was discovered in Veritas Backup Exec before 21.2. The communication between a client and an Agent requires successful authentication, which is typically completed over a secure TLS communication. However, due to a vulnerability in the SHA Authentication scheme, an attacker is able to gain unauthorized access and complete the authentication process. Subsequently, the client can execute data management protocol commands on the authenticated connection. By using crafted input parameters in one of these commands, an attacker can access an arbitrary file on the system using System privileges.
This page as .md · .json · in your agent: get_signal("CVE-2021-27876")
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