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.
https://www.veritas.com/support/en_US/security/VTS21-001; https://nvd.nist.gov/vuln/detail/CVE-2021-27877
Key Details
| Property | Value |
|---|---|
| CVE ID | CVE-2021-27877 |
| Vendor / Product | Veritas — Backup Exec Agent |
| NVD Published | 2021-03-01 |
| NVD Last Modified | 2025-11-03 |
| CVSS 3.1 Score | 8.2 |
| CVSS 3.1 Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N |
| Severity | HIGH |
| CISA KEV Added | 2023-04-07 |
| CISA KEV Deadline | 2023-04-28 |
| Known Ransomware Use | ⚠️ Yes |
CVSS 3.1 Breakdown
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
Low
Availability
None
Required Action
CISA BOD 22-01 Deadline: 2023-04-28.
Apply updates per vendor instructions.
Timeline
| Date | Event |
|---|---|
| 2023-04-07 | Added to CISA Known Exploited Vulnerabilities catalog |
| 2023-04-28 | CISA BOD 22-01 remediation deadline |
References
| Resource | Type |
|---|---|
| NVD — CVE-2021-27877 | Vulnerability Database |
| CISA KEV Catalog Entry | US Government |