CVE-2021-27877 — Veritas Backup Exec Agent Improper Authentication Vulnerability
Overview
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.
Vulnerability details
- CVE ID
- CVE-2021-27877
- Vulnerability
- Veritas Backup Exec Agent Improper Authentication Vulnerability
- Vendor
- Veritas
- Affected products
- Veritas: Backup Exec Agent
- Severity
- HIGH
- Exploitation status
- Actively exploited in the wild (CISA KEV)
- Published
- 2023-04-07
Remediation guidance
CVE-2021-27877 is in CISA's Known Exploited Vulnerabilities (KEV) catalog — U.S. federal civilian agencies are required to remediate it under Binding Operational Directive 22-01. Treat it as a priority for every environment.
Apply the vendor's official security update for Veritas the affected product as soon as possible. Where a patch is unavailable, apply vendor mitigations or isolate/segment exposed systems.
Hunt for indicators of compromise tied to this vulnerability and confirm logging/EDR coverage on affected assets.
Authoritative references
Remediate CVE-2021-27877 — and stay ahead of the next one
CVE-2021-27877 is listed in the CISA KEV catalog as actively exploited — treat remediation as urgent. Scan your domain free to see whether CVE-2021-27877 and other Veritas issues affect you and get a prioritized remediation report (full report from ₹999) — or stream the full feed of 1,600+ actively-exploited CVEs straight into your SOC.
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