Is CVE-2022-21826 actively exploited?

No active exploitation of CVE-2022-21826 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2022-21826 be exploited remotely?

Yes. CVE-2022-21826 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2022-21826?

CVE-2022-21826 has a CVSS score of 5.4 (MEDIUM).

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MEDIUM

CVE-2022-21826

CWE-444Published: September 30, 2022· Updated: Jun 17, 2026

5.4

CVSS v3.1

Official Description

Pulse Secure version 9.115 and below may be susceptible to client-side http request smuggling, When the application receives a POST request, it ignores the request's Content-Length header and leaves the POST body on the TCP/TLS socket. This body ends up prefixing the next HTTP request sent down that connection, this means when someone loads website attacker may be able to make browser issue a POST to the application, enabling XSS.

NVD Source

Technical Analysis

CVE-2022-21826 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.