CVE-2022-40870

Name: CVE-2022-40870
Creator: NVD / NIST
Published: 2022-11-23T00:15:11.063+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.1/10EPSS 1.05%

Last modified Jun 17, 2026

CVE-2022-40870 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. The Web Client of Parallels Remote Application Server v18.0 is vulnerable to Host Header Injection attacks. This vulnerability allows attackers to execute arbitrary commands via a crafted payload injected into the Host header.. EPSS estimates a 1.05% chance of exploitation in the next 30 days.

Description

The Web Client of Parallels Remote Application Server v18.0 is vulnerable to Host Header Injection attacks. This vulnerability allows attackers to execute arbitrary commands via a crafted payload injected into the Host header.

Metrics

CVSS 3.1

8.1/10

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

EPSS Probability

1.05%

59.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Parallels	Remote Application Server	18.0

References

https://github.com/IthacaLabs/Parallels/blob/main/ParallelsRemoteApplicationServer/HHI_CVE-2022-40870.txtExploit, Third Party Advisory
https://github.com/IthacaLabs/Parallels/tree/main/ParallelsRemoteApplicationServerExploit, Third Party Advisory
https://github.com/IthacaLabs/Parallels/blob/main/ParallelsRemoteApplicationServer/HHI_CVE-2022-40870.txtExploit, Third Party Advisory
https://github.com/IthacaLabs/Parallels/tree/main/ParallelsRemoteApplicationServerExploit, Third Party Advisory

Timeline

Published: Nov 23, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-40870?

How severe is CVE-2022-40870?

CVE-2022-40870 has a CVSS score of 8.1/10 (HIGH severity). The EPSS model estimates a 1.05% probability of exploitation in the next 30 days.

How do I fix CVE-2022-40870?

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-2022-40870?

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

Scan your code now

Source: NVD / NIST