CVE-2021-27877
CVSS v3
9.8
CRITICAL
EPSS Score
29.4 %
exploit probability
CISA KEV
Yes
known exploited
Exploitation
—
SSVC status
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.
CISA Known Exploited Vulnerability
- Date Added
- 2023-04-07
- Patch Due Date
- 2023-04-28
- Ransomware Use
- Known
Technical details
- Published
- 2021-03-01
Frequently asked questions
What is CVE-2021-27877?
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.
Is CVE-2021-27877 actively exploited?
Yes. CVE-2021-27877 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2023-04-28.
What is the CVSS score for CVE-2021-27877?
CVE-2021-27877 has a CVSS v3 base score of 9.8 (CRITICAL severity).
Is CVE-2021-27877 affecting your environment?
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