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Vulnerabilities

Vulnerability · CVE-2021-22893

Ivanti Pulse Connect Secure Use-After-Free Vulnerability

Published Apr 20, 2021 · catalog updated Aug 11, 2026 · Ivanti Connect Secure and Policy Secure

Patch now

CVE-2021-22893 is in the CISA known-exploited catalog, due May 3, 2022. Confirm Ivanti Connect Secure and Policy Secure against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Severity
Critical10.0
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
47.17%
Remediation
Remediation guidance
Affected products
cpe ivanti/connect secure · vendor Ivanti Connect Secure and Policy Secure · vendor Ivanti Pulse Connect Secure

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe ivanti/connect secure9.0
  • vendor Ivanti Connect Secure and Policy Secureversion unspecified
  • vendor Ivanti Pulse Connect Secureversion unspecified

How to fix CVE-2021-22893

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2021-22893 is in the CISA known-exploited catalog, due May 3, 2022. Confirm Ivanti Connect Secure and Policy Secure against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Compare what you have installed with ivanti/connect secure 9.0. Apply updates per vendor instructions.

What should an analyst verify?

CWE-287: Improper Authentication; CWE-416: Use After Free. EPSS 47.17%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Apr 23, 2021 · Catalog

    Detected

    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.

  2. Nov 3, 2021 · CISA KEV

    Known exploited

    Apply updates per vendor instructions.

  3. May 3, 2022 · CISA KEV

    Remediation due

    Apply updates per vendor instructions.

  4. Aug 11, 2026 · Catalog

    Updated

    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.

Sources

  • CISA KEVConfirmed exploitationCVE-2021-22893

    Ivanti Pulse Connect Secure contains a use-after-free vulnerability that allow a remote, unauthenticated attacker to execute code via license services.

    cisa.gov
  • CVE.orgVulnerability recordCVE-2021-22893

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2021-22893

    30-day exploitation probability 47.2%

    first.org
  • NIST NVDVulnerability recordCVE-2021-22893

    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 ex

    nvd.nist.gov
  • VulnCheck KEVConfirmed exploitationCVE-2021-22893

    Ivanti Pulse Connect Secure contains a use-after-free vulnerability that allow a remote, unauthenticated attacker to execute code via license services.

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.