CVE-2021-27877VulnerabilityPublished 04/07/2023Updated 10/24/2026
CVE-2021-27877: Veritas Backup Exec Agent Improper Authentication Vulnerability
Affects Veritas Backup Exec AgentSource CISA KEV
Severity
HighNo CVSS score published yet
- Exploitation
Actively exploited – in CISA KEV since 04/07/2023
- KEV deadline
- 04/28/2023
- Ransomware
- Used in ransomware campaigns
- EPSS
- 64.9% chance of exploitation in 30 days – higher than 99% of CVEs
What to do
CISA required action
Apply updates per vendor instructions.
Description
Veritas Backup Exec (BE) Agent contains an improper authentication vulnerability that could allow an attacker unauthorized access to the BE Agent via SHA authentication scheme.