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High · 8.2 Known exploited · Ransomware Scanner template Public exploit CVE-2021-27877 EUVD-2021-14615GHSA-grhg-3w4v-cp2r

An issue was discovered in Veritas Backup Exec before 21.2. It supports multiple authentication schemes: SHA authentication is one of these…

Published Mar 1, 2021 · Updated Oct 21, 2025 · Assigned by mitre

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.

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

Metasploit 1 module

GitHub 1 repository

  • yashswarup12/CVE-2021-27877-PoC ★ 0 · Jul 2, 2026

    A modified version of the Rapid7 Metasploit module for CVE-2021-27877 that supports direct command execution for reliable vulnerability validation. Includes documentation explaining the exploit workf…

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

Automated scanner template

A ready-made Nuclei template detects this vulnerability automatically. Vulnerabilities with public scanner templates are typically probed across the internet soon after the template appears — exposed systems should be patched first.

Source: projectdiscovery/nuclei-templates (MIT) — updated daily. Only links are listed.

References