CVE-2020-15860

Name: CVE-2020-15860
Creator: NVD / NIST
Published: 2020-07-24T16:15:11.973+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.9/10EPSS 4.01%

Last modified Jun 17, 2026

CVE-2020-15860 is a critical-severity vulnerability rated 9.9/10 on the CVSS scale. Parallels Remote Application Server (RAS) 17.1.1 has a Business Logic Error causing remote code execution. It allows an authenticated user to execute any application in the backend operating system through the web application, despite the affected application not being published. EPSS estimates a 4.01% chance of exploitation in the next 30 days.

Description

Parallels Remote Application Server (RAS) 17.1.1 has a Business Logic Error causing remote code execution. It allows an authenticated user to execute any application in the backend operating system through the web application, despite the affected application not being published. In addition, it was discovered that it is possible to access any host in the internal domain, even if it has no published applications or the mentioned host is no longer associated with that server farm.

Metrics

CVSS 3.1

9.9/10

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

EPSS Probability

4.01%

89.3th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Parallels	Remote Application Server	17.1.1

References

https://kb.parallels.com/en/125112Vendor Advisory
https://www.coresecurity.com/core-labs/advisories/parallels-ras-os-command-executionExploit, Third Party Advisory
https://www.parallels.com/products/ras/remote-application-server/Product
https://kb.parallels.com/en/125112Vendor Advisory
https://www.coresecurity.com/core-labs/advisories/parallels-ras-os-command-executionExploit, Third Party Advisory
https://www.parallels.com/products/ras/remote-application-server/Product

Timeline

Published: Jul 24, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-15860?

How severe is CVE-2020-15860?

CVE-2020-15860 has a CVSS score of 9.9/10 (CRITICAL severity). The EPSS model estimates a 4.01% probability of exploitation in the next 30 days.

How do I fix CVE-2020-15860?

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-2020-15860?

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

Scan your code now

Source: NVD / NIST