CVE-2021-22893
Ivanti Pulse Connect Secure Use-After-Free
- Published23 Apr 2021
- Added to CISA KEV3 Nov 2021
- Remediation due3 May 2022
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 3.1 breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:HAffected products
Remediation
No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.
References
- https://blog.pulsesecure.net/pulse-connect-secure-security-update/
- https://kb.cert.org/vuls/id/213092
- https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44784/
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-22893
- https://www.fireeye.com/blog/threat-research/2021/04/suspected-apt-actors-leverage-bypass-techniques-pulse-secure-zero-day.html
- https://www.kb.cert.org/vuls/id/213092
Related CVEs
Recent high-severity vulnerabilities sharing a weakness type.
Frequently asked
Is CVE-2021-22893 being actively exploited?
Yes. CVE-2021-22893 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 3 Nov 2021. It has been used in ransomware campaigns.
How severe is CVE-2021-22893?
CVE-2021-22893 has a CVSS 3.1 base score of 10.0, rated critical. EPSS estimates a 47.2% probability of exploitation.
Which products are affected by CVE-2021-22893?
Affected products include Ivanti Connect Secure.
How do I fix CVE-2021-22893?
Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.
How Secuno handles this
Secuno correlates vulnerabilities like CVE-2021-22893 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, a risk for it never ranks below high, and the update that fixes it moves to the Emergency patch lane. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.
Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.