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CVE-2021-22893

10, critical Known exploited Used in ransomware

Ivanti Pulse Connect Secure Use-After-Free Vulnerability

NVD (opens in a new tab) CVE.org (opens in a new tab) CISA KEV catalogue (opens in a new tab)
CVSS
10, critical critical CVSS v3.1
EPSS, next 30 days
47% higher than 98.8% of scored CVEs
Exploitation
Confirmed in the wild
Published
23 Apr 20215 years ago

Known exploited

CISA added this to the Known Exploited Vulnerabilities Catalog on 3 Nov 2021 and links it to ransomware activity. US federal agencies had to remediate by 3 May 2022, a deadline that has passed.

Required action. Apply updates per vendor instructions.

Description

Pulse Connect Secure 9.0R3/9.1R1 and higher is vulnerable to an authentication bypass vulnerability exposed by the Windows File Share Browser and Pulse Secure Collaboration features of Pulse Connect Secure that can allow an unauthenticated user to perform remote arbitrary code execution on the Pulse Connect Secure gateway. This vulnerability has been exploited in the wild.

Details

Vendor
Ivanti
Product
Pulse Connect Secure
Weakness
CWE-287 (opens in a new tab)
Status
Analyzed
Updated
12 Aug 2026
Assigner
support@hackerone.com

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

References 6

Advisories 5

Other references 1

The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.

Other Ivanti CVEs

Every Ivanti CVE we hold

Same vendor in what we hold, not a known link between the flaws.

  • CVE-2026-104935 Ivanti Connect Secure Authentication Bypass by Spoofing Vulnerability KEV EPSS 26% 8.6, high
  • CVE-2026-10520 Ivanti Sentry OS Command Injection Vulnerability KEV EPSS 100% 10, critical
  • CVE-2026-6973 Ivanti Endpoint Manager Mobile (EPMM) Improper Input Validation Vulnerability KEV EPSS 3% 7.2, high
  • CVE-2026-1603 Ivanti Endpoint Manager (EPM) Authentication Bypass Vulnerability KEV EPSS 88% 7.5, high
  • CVE-2026-1281 Ivanti Endpoint Manager Mobile (EPMM) Code Injection Vulnerability KEV EPSS 99% 9.8, critical
  • CVE-2026-1340 Ivanti Endpoint Manager Mobile (EPMM) Code Injection Vulnerability KEV EPSS 99% 9.8, critical
  • CVE-2025-4427 Ivanti Endpoint Manager Mobile (EPMM) Authentication Bypass Vulnerability KEV EPSS 100% 7.5, high
  • CVE-2025-4428 Ivanti Endpoint Manager Mobile (EPMM) Code Injection Vulnerability KEV EPSS 87% 8.8, high

Beyond this page

Is CVE-2021-22893 in your network?

This page tells you how dangerous CVE-2021-22893 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.

CVE-2021-22893 is in the CISA catalogue of exploited vulnerabilities: attackers are already exploiting it.

  • EXYS7600 OCELOT

    Find it before attackers do

    Ocelot scans your network on a schedule and reports every vulnerability it finds by its CVE identifier, with its CVSS score and how many of your hosts are affected. A finding like CVE-2021-22893 comes with the devices to patch.

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  • EXYS7950 KONDRA

    Detect it if it's exploited

    Until the patch is applied, Kondra monitors your network, events and endpoints in real time. It keeps an inventory of the software installed on every endpoint, and its anomaly detection rules flag what an attacker does once inside.

    Learn more about EXYS7950 KONDRA
Check your exposure

Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 17 Oct 2026, not the live upstream state.