The Proofpoint Insider Threat Management Agents (formerly ObserveIT Agent) for MacOS and…
Priority LOW 33CWE-295Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- Spoofing
- Confidentiality · integrity · availability
- High · High · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-295.
Summary
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.
Why it matters now
EPSS 0.00634 50th percentileScored 2026-11-08
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 2
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:proofpoint:insider_threat_management:*:*:*:*:*:linux:*:* | 7.9.0 to before 7.9.3; 7.10.0 to before 7.10.3; 7.11.0 to before 7.11.1 | Vulnerable | Proofpoint |
| cpe:2.3:a:proofpoint:insider_threat_management:*:*:*:*:*:macos:*:* | 7.9.0 to before 7.9.3; 7.10.0 to before 7.10.3; 7.11.0 to before 7.11.1 | Vulnerable | Proofpoint |
- cpe:2.3:a:proofpoint:insider_threat_management:*:*:*:*:*:linux:*:* Versions 7.9.0 to before 7.9.3; 7.10.0 to before 7.10.3; 7.11.0 to before 7.11.1 Vulnerable ·Proofpoint
- cpe:2.3:a:proofpoint:insider_threat_management:*:*:*:*:*:macos:*:* Versions 7.9.0 to before 7.9.3; 7.10.0 to before 7.10.3; 7.11.0 to before 7.11.1 Vulnerable ·Proofpoint
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-27899
- 2026-10-03 Alias added: GHSA-w2jc-6hpr-7cwc
- 2026-10-23 EPSS moved to the 50th–90th percentile
References
More Proofpoint Insider Threat Management vulnerabilities
- TI-2020-07138 rcdsvc in the Proofpoint Insider Threat Management Windows Agent (formerly ObserveIT… CVSS 3.1HIGH 8.8
- TI-2021-09235 The Proofpoint Insider Threat Management Server (formerly ObserveIT Server) is missing an… CVSS 3.1HIGH 8.1
- TI-2023-04418 ITM MacOS Agent Improper Certificate Validation CVSS 3.1HIGH 7.5
- TI-2022-08988 Proofpoint Insider Threat Management Agent for Windows relies on an inherently dangerous… CVSS 3.1HIGH 7.8
- TI-2021-05149 Insider Threat Management Windows Agent Local Privilege Escalation Vulnerability The… CVSS 3.1HIGH 7.8
- TI-2021-05148 The Proofpoint Insider Threat Management Server (formerly ObserveIT Server) is vulnerable… CVSS 3.1HIGH 7.2
Sources
- CVE-2021-27899 · CVE Program
- CVE-2021-27899 · NVD
- FIRST EPSS
- GHSA-w2jc-6hpr-7cwc · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences