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Servers and applications

CVE-2021-22894

A buffer overflow vulnerability exists in Pulse Connect Secure before 9.1R11.4 allows a remote authenticated attacker to execute arbitrary code as the root user via maliciously crafted meeting room.

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

Severity
High 8.8
Published
27 May 2021
Last changed
17 Jun 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 Collaboration Suite Buffer Overflow Vulnerability
Required action
Apply updates per vendor instructions.
Due for US agencies
3 May 2022
Used in ransomware
Not known

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2021-22894
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2021-22894