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CVE-2021-22893

Published: Apr 23, 2021Updated: Dec 18, 2025 Sources: CVE List NVD BDUCWE-287
NVD MITRE
10.0CVSSCRITICAL
EPSS Score
47.2%
Top 1.3%
CISA KEV
Active Exploitation
Since Nov 3, 2021
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:CC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-287CWE-416

Affected Products

Pulse Connect Securen/a
connect secureivantiSecurity Products
Pulse Connect SecurePulsesecure
On-premNetwork Device
Networking Infrastructure / vpn-gateway
ivanticommercialUSSecurity Productsaka ivanti connect secure, avalanche
pulsesecurecommercialUSNetworking Infrastructureaka pulsedsecure, pulse secure

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

CISA Known Exploited Vulnerability
Added to KEV:Nov 3, 2021
Remediation due:May 3, 2022
Ransomware:Known ransomware use

Required action: Apply updates per vendor instructions.

Official Patch Available

MITRE ATT&CK

3 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

References

https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44784/
kb.pulsesecure.net
https://blog.pulsesecure.net/pulse-connect-secure-security-update/
blog.pulsesecure.net
https://www.fireeye.com/blog/threat-research/2021/04/suspected-apt-actors-leverage-bypass-techniques-pulse-secure-zero-day.html
fireeye.com
and 6 more references View all →

Timeline

Published
Apr 23, 2021
Added to CISA KEV
Nov 3, 2021
Last Updated
Dec 18, 2025

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