Is CVE-2021-27876 actively exploited?

Yes. CVE-2021-27876 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, which means exploitation in the wild has been confirmed.

Can CVE-2021-27876 be exploited remotely?

The attack vector of CVE-2021-27876 has not been classified yet.

What is the CVSS score of CVE-2021-27876?

CVE-2021-27876 has not received a CVSS score yet.

HOME VULNERABILITIESCVE-2021-27876

HIGHCISA KEVIN THE WILD

CVE-2021-27876

Published: April 7, 2023

EPSS:0.99%probability of exploitation in 30 daysPercentile:76.5th

Official Description

Veritas Backup Exec (BE) Agent contains a file access vulnerability that could allow an attacker to specially craft input parameters on a data management protocol command to access files on the BE Agent machine.

NVD Source

CISA KEV Advisory

Veritas Backup Exec Agent File Access Vulnerability

Added to KEV: 2023-04-07Federal patch deadline: 2023-04-28⚠ USED IN RANSOMWARE CAMPAIGNS

Required Action (CISA)

Apply updates per vendor instructions.

Risk Analysis

This high-severity file access vulnerability in Veritas Backup Exec (BE) Agent allows an attacker to access files on the BE Agent machine by crafting input parameters for a data management protocol command. The confirmed in-the-wild exploitation and inclusion in CISA's KEV catalog make this an urgent concern, despite a low EPSS score.

Active exploitation of this vulnerability has been observed in the wild, and it is listed in CISA's KEV catalog.

Recommended Action

Apply all available security updates for Veritas Backup Exec Agent. Restrict network access to the BE Agent and monitor for suspicious file access attempts.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2021-27876 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CISA has added CVE-2021-27876 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.