CVE-2021-22900
HighExploitedPublic exploitA vulnerability allowed multiple unrestricted uploads in Pulse Connect Secure before 9.1R11.4 that could lead to an authenticated administrator to perform a file write via a maliciously crafted archive upload in the administrator web interface.
Published May 27, 2021 · Updated Dec 17, 2025
Key Facts
Patch immediately- CVE-2021-22900 is a high-severity vulnerability (CVSS 7.2 v3.1) affecting Connect Secure (Ivanti), Pulse Connect Secure (Pulsesecure), Pulse Secure Secure.
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Aug 20, 2021. Public exploit code is available.
- EPSS estimates a 14% probability of exploitation in the next 30 days.
- Fixed versions are available, including Pulse Connect Secure <=9.1, Pulse Connect Secure 9.1.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
7.2
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
14%
Higher than 96.5% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2021-22900 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
A vulnerability allowed multiple unrestricted uploads in Pulse Connect Secure before 9.1R11.4 that could lead to an authenticated administrator to perform a file write via a maliciously crafted archive upload in the administrator web interface.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Nov 3, 2021 | May 3, 2022 | Not reported |
| Industry KEV feed | Aug 20, 2021 | May 3, 2022 | Not reported |
| CIRCL KEV | Nov 3, 2021 | May 3, 2022 | Not reported |
| ENISA EUVD | Nov 3, 2021 | n/a | Not reported |
Required action: Apply updates per vendor instructions.
Affected Products
42 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Connect SecureIvanti | 9.0, 9.0-r1, 9.0-r1.0, 9.0-r2, 9.0-r2.0, 9.0-r2.1, 9.0-r3, 9.0-r3.0 | n/a |
| Pulse Connect SecurePulsesecure | See advisory | 9.1 |
| Pulse Secure Secure | >= Fixed in 9.1R11.4 | n/a |
Patched Releases
Pulse Connect Secure
<=9.1
Timeline
Publicly disclosed
May 27, 2021
Added to Industry KEV feed
Aug 20, 2021
Added to CISA KEV
Nov 3, 2021
Added to CIRCL KEV
Nov 3, 2021
Added to ENISA EUVD
Nov 3, 2021
Last updated
Dec 17, 2025
Weakness Type
- CWE-94 Improper Control of Generation of Code ('Code Injection')
- CWE-669 Incorrect Resource Transfer Between Spheres
References
FAQ
Common Questions.
A vulnerability allowed multiple unrestricted uploads in Pulse Connect Secure before 9.1R11.4 that could lead to an authenticated administrator to perform a file write via a maliciously crafted archive upload in the administrator web interface.
Affected: Connect Secure (Ivanti) versions 9.0, 9.0-r1, 9.0-r1.0, 9.0-r2, 9.0-r2.0, 9.0-r2.1, 9.0-r3, 9.0-r3.0; Pulse Connect Secure (Pulsesecure); Pulse Secure Secure versions >= Fixed in 9.1R11.4. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Aug 20, 2021.
Yes. It was added on Nov 3, 2021 with a federal remediation due date of May 3, 2022.
Public exploit code is available.
Fixed versions are available, including Pulse Connect Secure <=9.1, Pulse Connect Secure 9.1.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Is CVE-2021-22900 Running On Your Attack Surface?
Brandefense maps vulnerabilities like this one to your internet-facing assets and tells you exactly where to patch.
Request A Demo