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CISA Known Exploited Vulnerability
This CVE is actively exploited in the wild. CISA mandates federal agencies to patch immediately.
CVE
CVE-2021-27877
9.8
CVSShigh
Exploitable remotely over the internet · no authentication required.
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.
Attack Vector
Network
Privileges Req.
None
User Interaction
None
Updated Nov 7, 2026View on NVD →
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