CVE-2021-27877 KEV
8.2
HIGH · CVSS 3.1 · EPSS 64.9% (pctl 99)
Patch first
On CISA KEV — known exploited in the wild, due 2023-04-28.
Description
An issue was discovered in Veritas Backup Exec before 21.2. It supports multiple authentication schemes: SHA authentication is one of these. This authentication scheme is no longer used in current versions of the product, but hadn't yet been disabled. An attacker could remotely exploit this scheme to gain unauthorized access to an Agent and execute privileged commands.
Scoring
| CVSS | 8.2 (HIGH, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N |
| EPSS | 64.91% — more likely to be exploited than 99% of all CVEs |
| On CISA KEV | yes — remediate by 2023-04-28 |
| Public exploit | none known |
| Published | 2021-03-01 |
| Last modified | 2026-06-17 |
CISA KEV
| Name | Veritas Backup Exec Agent Improper Authentication Vulnerability |
|---|---|
| Added | 2023-04-07 |
| Due | 2023-04-28 |
| Vendor / product | Veritas / Backup Exec Agent |
| Ransomware use | known |
Affected (1)
| Vendor | Product |
|---|---|
| veritas | backup exec |
References
- http://packetstormsecurity.com/files/168506/Veritas-Backup-Exec-Agent-Remote-Code-Execution.html
- https://www.veritas.com/content/support/en_US/security/VTS21-001#issue1
- http://packetstormsecurity.com/files/168506/Veritas-Backup-Exec-Agent-Remote-Code-Execution.html
- https://www.veritas.com/content/support/en_US/security/VTS21-001#issue1
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-27877
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