Is CVE-2021-27899 actively exploited?

CVE-2021-27899 has no public evidence of in-the-wild exploitation as of 2024-11-21.

What is the CVSS score for CVE-2021-27899?

CVE-2021-27899 has a CVSS score of 7.4 (HIGH severity). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N.

How do I patch CVE-2021-27899?

Patch guidance is available from proofpoint security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2021-27899.

Fix CVE-2021-27899 - HIGH | CVEDatabase.com

Q: Which products are affected by CVE-2021-27899?

6 products: proofpoint insider threat management, proofpoint insider threat management, proofpoint insider threat management, proofpoint insider threat management, proofpoint insider threat management, and 1 more.

Description

The Proofpoint Insider Threat Management Agents (formerly ObserveIT Agent) for MacOS and Linux perform improper validation of the ITM Server's certificate, which enables a remote attacker to intercept and alter these communications using a man-in-the-middle attack. All versions before 7.11.1 are affected. Agents for Windows and Cloud are not affected.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Attack Vector: network
Complexity: high
Privileges: none
User Action: none
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: none
Weaknesses: CWE-295

Metadata

Primary Vendor: PROOFPOINT
Published: 4/6/2021
Last Modified: 11/21/2024
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

proofpoint : insider_threat_managementproofpoint : insider_threat_managementproofpoint : insider_threat_managementproofpoint : insider_threat_managementproofpoint : insider_threat_managementproofpoint : insider_threat_management

Remediation Guidance

Executive Summary

Cite this page

CVE-2021-27899. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2021-27899

View on NIST NVD

CVE-2021-27899 vulnerability