CVE-2021-27899

HIGH
7.4
CVSS Score
Published: April 6, 2021 at 08:48 PM UTC
Updated: June 17, 2026 at 03:45 AM UTC
1 product affected across 1 vendorInsider Threat Management

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Severity
HIGH7.4
Exploit prediction
EPSS 0.6%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

7.10.0 ≤ v < 7.10.37.11.0 ≤ v < 7.11.17.9.0 ≤ v < 7.9.3
Affected range stops below 7.10.3, so it looks safe — our inference, not a vendor statement
Affected range stops below 7.11.1, so it looks safe — our inference, not a vendor statement
Affected range stops below 7.9.3, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

CVSS

Attack Vector
NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-295

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