What is CVE-2021-22893?

CVE-2021-22893 is a critical-severity vulnerability in Ivanti Connect Secure, classified under Improper Authentication. CVSS score: 10.0/10. Published 2021-04-23.

How severe is CVE-2021-22893?

Critical severity. CVSS v3 base score is 10.0 out of 10.

Is CVE-2021-22893 known to be exploited?

Yes. CVE-2021-22893 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating it is being actively exploited. 29 public proof-of-concept repositories are indexed.

Auth bypass in Ivanti Connect Secure

CVE-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 execution on the Pulse Connect Secure gateway. This vulnerability has been exploited in the wild.

Vulnerability class: Broken Authentication

EPSS: 0.472 (98.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.

Affected products

Ivanti Connect_secure — versions 9.0, 9.1
N/a Pulse Connect Secure — versions PCS 9.0R3 or above, PCS 9.1R1 and above

Weakness classification (CWE)

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.

Known ransomware campaign use: yes.

Public proof-of-concept exploits

References

support@hackerone.com (x_refsource_MISC, Broken Link, Vendor Advisory)
support@hackerone.com (x_refsource_MISC, Vendor Advisory)
support@hackerone.com (Third Party Advisory, x_refsource_MISC)
support@hackerone.com (US Government Resource, Third Party Advisory, x_refsource_MISC)
af854a3a-2127-422b-91ae-364da2661108 (US Government Resource)
134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)

Frequently asked questions

What is CVE-2021-22893?: CVE-2021-22893 is a critical-severity vulnerability in Ivanti Connect Secure, classified under Improper Authentication. CVSS score: 10.0/10. Published 2021-04-23.
How severe is CVE-2021-22893?: Critical severity. CVSS v3 base score is 10.0 out of 10.
Is CVE-2021-22893 known to be exploited?: Yes. CVE-2021-22893 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating it is being actively exploited. 29 public proof-of-concept repositories are indexed.