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CVE-2021-27878

Known Exploited (CISA KEV)HIGH
8.8
CVSS Severity Score
EPSS Score77.1500%
EPSS Percentile88.22th
PublishedMar 1, 2021
Last ModifiedNov 3, 2025

Vulnerability Description

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. The attacker could use one of these commands to execute an arbitrary command on the system using system privileges.

Affected Platforms (CPE)

πŸ“¦
Veritas

Backup Exec

< 21.2

References & Advisories

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