Exploited CVEs / Ivanti / CVE-2021-22893
CVE-2021-22893
Ivanti Pulse Connect Secure Use-After-Free Vulnerability. Exploitation in the wild is confirmed by CISA, not predicted, and the vulnerability is known to be used in ransomware campaigns. 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.
Actively exploited Ivanti Pulse Connect Secure vulnerability, Critical severity, CVSS 10.0. Added to the CISA KEV catalog 2021-11-03.
Risk summary
Updated July 26, 2026. Data refreshed on every build from MSRC, CISA KEV, and FIRST EPSS.
Senserva AI Opinion for CVE-2021-22893
A perfect 10.0 CVSS score, confirmed exploitation, and ransomware use make this Ivanti Pulse Connect Secure flaw about as bad as VPN vulnerabilities get. The use-after-free lets a remote, unauthenticated attacker execute code via license services, meaning the appliance can be taken over from the internet with no credentials. EPSS still rates exploitation probability at 47 percent, remarkable for a bug this old.
Do this: Upgrade or retire any Pulse Connect Secure appliance not confirmed patched against CVE-2021-22893, and review it for persistence if it ever ran vulnerable.
AI-generated from public data, 2026-07-07. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for CVE-2021-22893
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for CVE-2021-22893
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.
CISA required action
Federal (BOD 22-01) remediation due date: 2022-05-03 (past due).
Apply updates per vendor instructions.
Official fix for CVE-2021-22893
The authoritative fix and affected-version list are published by the vendor. Find the Pulse Connect Secure advisory on Ivanti Security Advisories.
Common questions about CVE-2021-22893
Is CVE-2021-22893 actively exploited?
Yes. CVE-2021-22893 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 47%. CISA also reports it is known to be used in ransomware campaigns.
What is the CISA deadline and required action for CVE-2021-22893?
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-2021-22893?
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-2021-22893?
Yes. This page includes a free, ready-to-paste AI prompt containing CVE-2021-22893'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 twice a day (5 AM and 3 PM US Central).
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Authoritative references
Every actively exploited CVE, searchable with due dates and CSV export: the exploited-CVE tracker. The newest additions: exploited this week.
