Is CVE-2021-34762 actively exploited?

No active exploitation of CVE-2021-34762 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-34762 be exploited remotely?

Yes. CVE-2021-34762 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-34762?

CVE-2021-34762 has a CVSS score of 8.1 (HIGH).

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HIGH

CVE-2021-34762

CWE-26Published: October 27, 2021· Updated: Jun 17, 2026

8.1

CVSS v3.1

Official Description

A vulnerability in the web-based management interface of Cisco Firepower Management Center (FMC) Software could allow an authenticated, remote attacker to perform a directory traversal attack on an affected device. The attacker would require valid device credentials. The vulnerability is due to insufficient input validation of the HTTPS URL by the web-based management interface. An attacker could exploit this vulnerability by sending a crafted HTTPS request that contains directory traversal character sequences to an affected device. A successful exploit could allow the attacker to read or write arbitrary files on the device.

NVD Source

Technical Analysis

CVE-2021-34762 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

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

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), with a CVSS base score of 8.1.