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CVE-2021-27877: Veritas Backup Exec Agent Improper Authentication Vulnerability
Veritas Backup Exec Agent · in CISA KEV since 2023-04-07
2023-04-07added to KEV
2023-04-28federal remediation due date
64.91%EPSS exploit probability (30 days) 99.2th percentile
9.8 CRITICALCVSS 3.1
Knownknown ransomware use
767days from NVD publication to KEV
What it is
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.
Required action (CISA)
Apply updates per vendor instructions.
| CWE | CWE-287 |
|---|---|
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD published | 2021-03-01 (Analyzed) |
Original records: NVD · CISA KEV · JSON: /api/cve/CVE-2021-27877.json · all KEV CVEs
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Get the full file: Exploited Vulnerabilities Brief – September 2026 ($29): this month's KEV additions ranked by EPSS, ransomware use and due date, ready to hand to a patch team. Checkout by Polar.