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Servers and applications

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.

Actively exploited: CISA added it to its Known Exploited Vulnerabilities catalog on 3 Nov 2021.

Severity
Critical 10.0
Published
23 Apr 2021
Last changed
12 Aug 2026
Added to UpHeron
1 Nov 2026
Sources
NVD

Affected software

SoftwareAffected versions
Ivanti Connect SecureServers and applications · cpe:a:ivanti:connect_secure
  • Version 9.1-r11.3
  • Version 9.1-r11.1
  • Version 9.1-r11.0
  • Version 9.1-r10.2
All 36 release lines
  • Version 9.0
  • Version 9.0-r1
  • Version 9.0-r2
  • Version 9.0-r2.1
  • Version 9.0-r3
  • Version 9.0-r3.1
  • Version 9.0-r3.2
  • Version 9.0-r3.3
  • Version 9.0-r3.5
  • Version 9.0-r4
  • Version 9.0-r4.1
  • Version 9.0-r5.0
  • Version 9.0-r6.0
  • Version 9.1
  • Version 9.1-r1
  • Version 9.1-r2
  • Version 9.1-r3
  • Version 9.1-r4
  • Version 9.1-r4.1
  • Version 9.1-r4.2
  • Version 9.1-r4.3
  • Version 9.1-r5
  • Version 9.1-r6
  • Version 9.1-r7
  • Version 9.1-r8
  • Version 9.1-r8.1
  • Version 9.1-r8.2
  • Version 9.1-r8.4
  • Version 9.1-r9
  • Version 9.1-r9.1
  • Version 9.1-r9.2
  • Version 9.1-r10.0
  • Version 9.1-r10.2
  • Version 9.1-r11.0
  • Version 9.1-r11.1
  • Version 9.1-r11.3

Known exploited

CISA name
Ivanti Pulse Connect Secure Use-After-Free Vulnerability
Required action
Apply updates per vendor instructions.
Due for US agencies
3 May 2022
Used in ransomware
Yes, known

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2021-22893
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2021-22893