What is CVE-2021-22899?

CVE-2021-22899 is a high-severity vulnerability in Ivanti Connect Secure, classified under Command Injection. CVSS score: 8.8/10. Published 2021-05-27.

How severe is CVE-2021-22899?

High severity. CVSS v3 base score is 8.8 out of 10.

Is CVE-2021-22899 known to be exploited?

Yes. CVE-2021-22899 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating it is being actively exploited. 4 public proof-of-concept repositories are indexed.

RCE in Ivanti Connect Secure

CVE-2021-22899

A command injection vulnerability exists in Pulse Connect Secure before 9.1R11.4 allows a remote authenticated attacker to perform remote code execution via Windows Resource Profiles Feature

Vulnerability class: Command Injection (OS Command Injection)

Published 2021-05-27 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.229 (97.7th percentile), scored 2026-10-18.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 98th percentile — 97.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.229 · newest: 0.229 · change: 0.000

Affected products

Ivanti Connect Secure — versions 9.0, 9.1
Pulse Connect Secure — versions Fixed in 9.1R11.4

Weakness classification (CWE)

CWE-77 — Command Injection

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2021-11-03. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2022-05-03.

Required action: Apply updates per vendor instructions.

Public proof-of-concept exploits

References

kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44784/ (Broken Link, Vendor Advisory)
134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)

Frequently asked questions

What is CVE-2021-22899?: CVE-2021-22899 is a high-severity vulnerability in Ivanti Connect Secure, classified under Command Injection. CVSS score: 8.8/10. Published 2021-05-27.
How severe is CVE-2021-22899?: High severity. CVSS v3 base score is 8.8 out of 10.
Is CVE-2021-22899 known to be exploited?: Yes. CVE-2021-22899 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating it is being actively exploited. 4 public proof-of-concept repositories are indexed.