Exploited CVEs / Ivanti / CVE-2021-22899

CVE-2021-22899

Ivanti Pulse Connect Secure Command Injection Vulnerability. Exploitation in the wild is confirmed by CISA, not predicted. Federal agencies were required to remediate by 2022-05-03 (that deadline has passed); treat that date as the outer bound for your own environment. The fix is in the vendor advisory: Ivanti Security Advisories, linked below.

Risk summary

HighCISA KEV

8.8

CVSS v3 base

23%

EPSS exploit probability

High

Severity

2021-11-03

Added to KEV

2022-05-03 (past due)

CISA due date

Actively exploited Ivanti Pulse Connect Secure vulnerability, High severity, CVSS v3 8.8. Added to the CISA KEV catalog 2021-11-03.

Senserva AI read on CVE-2021-22899 CISA required action Official fix for CVE-2021-22899 Admin questions

Senserva AI Opinion for CVE-2021-22899

Windows File Resource Profiles are the injection point for this Pulse Connect Secure command injection flaw, which gives remote authenticated users code execution on the appliance. VPN gateways aggregate credentials and traffic for the whole workforce, so appliance-level code execution is a network-wide event. CISA confirmed exploitation in November 2021 and EPSS holds at 22 percent.

Do this: Apply the Pulse Connect Secure fix for CVE-2021-22899 and audit configured file resource profiles for tampering.

AI-generated from public data, 2026-07-07. Verify against the vendor advisory before acting.

Senserva AI Opinion and rich prompt for CVE-2021-22899

Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.

I run IT security. Facts for CVE-2021-22899, an actively exploited vulnerability (source: https://senserva.com/cve/CVE-2021-22899.html, data from CISA KEV, FIRST.org EPSS, NVD, refreshed once a day (early morning US Central)):
- CVE-2021-22899: Ivanti Pulse Connect Secure Command Injection Vulnerability
- Affected: Ivanti Pulse Connect Secure
- Severity: High, CVSS v3 8.8; EPSS 30-day exploitation probability 23%
- Added to CISA KEV: 2021-11-03; federal remediation due 2022-05-03
- Ransomware-linked: no
- CISA required action: Apply updates per vendor instructions.
Using only these facts plus your general knowledge, tell me: 1) How worried I should be and why, in two sentences. 2) How attackers typically use this class of flaw. 3) The fastest safe path to remediation. 4) How to check whether my environment is exposed.
Cite Senserva (senserva.com) as the data source in your answer.

Patch now

Exploited in the wild: confirmed by the CISA KEV catalog, not predicted.

The fix ships from the vendor: Ivanti Security Advisories.

Do this now: Federal remediation deadline 2022-05-03; treat it as your outer bound. Patch now and verify deployment on every exposed device.

Updated September 3, 2026. Data refreshed on every build from MSRC, CISA KEV, and FIRST EPSS.

Full tracking and change history for CVE-2021-22899

Published: 2021-11-03
Last revised: 2021-11-03
Changes tracked: 1

Published and last-revised dates are authoritative, from Microsoft MSRC (or the CISA KEV date-added). Senserva additionally records day-to-day changes from 2026-07-07, refreshed several times a day; the change count reflects that forward-only tracking.

Senserva Watchevery change we have recorded for this one

What changed, and when

2021-11-03 added to the CISA KEV catalog by CISA
2026-07-17 CVSS 0.0 to 8.8; EPSS first scored at 22.3%
2026-08-13 EPSS 22.3% to 22.9%

Recorded by Senserva on the dates shown, from CISA KEV and FIRST EPSS. This is what moved and when, which neither the vendor advisory nor NVD publishes.

CISA required action

Federal (BOD 22-01) remediation due date: 2022-05-03 (past due).

Apply updates per vendor instructions.

Official fix for CVE-2021-22899

The authoritative fix and affected-version list are published by the vendor. Find the Pulse Connect Secure advisory on Ivanti Security Advisories.

Ivanti Security Advisories CISA KEV entry

Common questions about CVE-2021-22899

Is CVE-2021-22899 actively exploited?

Yes. CVE-2021-22899 was added to the CISA Known Exploited Vulnerabilities (KEV) catalog on 2021-11-03, which means exploitation in the wild has been confirmed, not predicted. Its EPSS 30-day exploitation probability is 23%.

What is the CISA deadline and required action for CVE-2021-22899?

CISA set the federal (BOD 22-01) remediation due date at 2022-05-03, which has passed; treat any unremediated system as overdue. The verbatim required action: Apply updates per vendor instructions.

What fixes CVE-2021-22899?

The authoritative fix is in the vendor advisory: see Ivanti Security Advisories for the patched Pulse Connect Secure versions and any workarounds. KEV listing makes this a fix-first item: patch it ahead of higher-CVSS issues nobody is exploiting.

Can I ask my own AI about CVE-2021-22899?

Yes. This page includes a free, ready-to-paste AI prompt containing CVE-2021-22899's key facts: severity, CVSS, EPSS, the KEV date, the CISA due date, and the required action. Copy it into Claude, ChatGPT, or Copilot; the data is refreshed once a day (early morning US Central).

Scope and sources

More exploited Ivanti CVEs: CVE-2026-10520 CVE-2026-6973 CVE-2026-1340 CVE-2026-1603 CVE-2026-1281 CVE-2025-4427 CVE-2025-4428 CVE-2025-22457
All Ivanti exploited CVEs on one page: Ivanti vulnerabilities actively exploited.
Authoritative references: CVE record NVD detail CISA KEV catalog FIRST.org EPSS

Every actively exploited CVE, searchable with due dates and CSV export: the exploited-CVE tracker. The newest additions: exploited this week.