CVE-2021-22893 kev+ ransomware in the critical feed json
Pulse Connect Secure 9.0R3/9.1R1 and higher is vulnerable to an authentication bypass vulnerability exposed by the Windows File Share Brows…
published 2021-04-23 5 y ago modified 2026-08-12 2 mo ago also EUVD-2021-10025
- cvss
- 10.0
- version 3.1, CNA
- cisa kev
- Exploited
- added 2021-11-03, used in ransomware
- epss
- 47.5%
- EPSS 47.5% chance of exploitation in 30 days, percentile 98%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
cisa required action Apply updates per vendor instructions.
Timeline
- CISA SSVC: exploitation active
- Published
- Added to CISA KEV
- CISA patch deadline
Known exploited
- Added
- 5 y ago
- Patch by
- 2022-05-03 (4 y ago)
- Ransomware
- Known to be used in ransomware campaigns
- Required action
- Apply updates per vendor instructions.
- Vendor, product
- Ivanti, Pulse Connect Secure
- CISA name
- Ivanti Pulse Connect Secure Use-After-Free Vulnerability
ATT&CK techniques
How it is exploited and what it leads to, in MITRE ATT&CK terms.
- T1190 Exploit Public-Facing Application exploitation
- T1059 Command and Scripting Interpreter primary impact
- T1003 OS Credential Dumping secondary impact
kev release 2025-07-28, att&ck v16.1. KEV to ATT&CK mappings by the MITRE Center for Threat-Informed Defense (Mappings Explorer, Apache-2.0). © 2026 The MITRE Corporation. This work is reproduced and distributed with the permission of The MITRE Corporation. Terms of use
CISA SSVC
- Exploitation
- Active, exploited in the wild
- Automatable
- yes
- Technical impact
- total
- Assessed
- 5 y ago
Exploit prediction
47.51% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 10.0 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
| NVD | 3.1 | 10.0 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
| CNA | 3.1 | 10.0 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
Affected products
- n/a Pulse Connect Secure
Classification
- Weakness
- Technology feeds
References
-
kb.pulsesecure.net
/articles/Pulse_Security_Advisories/SA44784/
broken-link, vendor-advisory
-
blog.pulsesecure.net
/pulse-connect-secure-security-update/
vendor-advisory
-
fireeye.com
/blog/threat-research/2021/04/suspected-apt-actors-leverage-bypass-techniques-pulse-secure-zero-day.html
third-party-advisory
-
kb.cert.org
/vuls/id/213092
third-party-advisory, us-government-resource
-
kb.cert.org
/vuls/id/213092
us-government-resource
-
cisa.gov
/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-22893
government-resource, us-government-resource
Sources
- CVE List CVE-2021-22893
- NVD CVE-2021-22893
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.