CVE-2020-10655

Name: CVE-2020-10655
Creator: NVD / NIST
Published: 2021-01-06T14:15:13.437+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 2.58%

Last modified Jun 17, 2026

CVE-2020-10655 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. The Proofpoint Insider Threat Management Server (formerly ObserveIT Server) before 7.9.1 contains a vulnerability in the ITM application server's WriteWindowMouse API. The vulnerability allows an anonymous remote attacker to execute arbitrary code with local administrator privileges. EPSS estimates a 2.58% chance of exploitation in the next 30 days.

Description

The Proofpoint Insider Threat Management Server (formerly ObserveIT Server) before 7.9.1 contains a vulnerability in the ITM application server's WriteWindowMouse API. The vulnerability allows an anonymous remote attacker to execute arbitrary code with local administrator privileges. The vulnerability is caused by improper deserialization.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

2.58%

83.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-502

Affected Software

Vendor	Product	Versions
Proofpoint	Insider Threat Management Server	< 7.9.1

References

https://www.proofpoint.com/us/blogProduct
https://www.proofpoint.com/us/security/security-advisories/pfpt-sa-2020-0003Vendor Advisory
https://www.proofpoint.com/us/blogProduct
https://www.proofpoint.com/us/security/security-advisories/pfpt-sa-2020-0003Vendor Advisory

Timeline

Published: Jan 6, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-10655?

How severe is CVE-2020-10655?

CVE-2020-10655 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 2.58% probability of exploitation in the next 30 days.

How do I fix CVE-2020-10655?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-10655?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST