Ivanti Pulse Connect Secure Collaboration Suite Buffer Overflow Vulnerability
Ivanti Pulse Connect Secure Collaboration Suite contains a buffer overflow vulnerabilities that allows a remote authenticated users to execute code as the root user via maliciously crafted meeting room.
- Vendor
- Ivanti
- Product
- Pulse Connect Secure
- CVSS
- 8.8
- EPSS (exploit probability)
- 41.3%
- Status
- kev
- CISA patch-by (BOD 22-01)
- Added to KEV
Is CVE-2021-22894 being exploited?
Yes. CISA added CVE-2021-22894 to its Known Exploited Vulnerabilities catalog on . CISA only lists a CVE when it has reliable evidence of exploitation in the wild.
FIRST's EPSS model puts the probability of exploitation activity in the next 30 days at 41.3% (scored October 14, 2026).
- CISA KEV[ LISTED ]
- ENISA EUVD (exploited)[ — ]
- CIRCL KEV[ — ]
Catalog snapshot 2026-11-13. Full cross-catalog view: /kev-comparison
CVE-2021-22894 timeline
Every event links to its source. Catalog dates are each catalog's own; day offsets count from NVD publication. Data: JSON
What to do
CISA required actionApply updates per vendor instructions.
US federal civilian agencies must remediate by (181 days after listing) under BOD 22-01. Everyone else: that deadline is a sensible upper bound, not a target. Vendor guidance and the NVD record are linked under Source above.
Other Ivanti Connect Secure CVEs we track
| CVE / Vulnerability | Severity | CVSS | EPSS | Added to KEV |
|---|---|---|---|---|
| CVE-2026-118527 Ivanti Connect Secure Predictable Identifier File Uploadwrite-up | [ UNKNOWN ] | — | 0.8% | |
| CVE-2026-111357 Ivanti Connect Secure Missing Authentication for Critical Function Vulnerabilitywrite-up | [ HIGH ] | 7.0 | 0.5% | |
| CVE-2026-104935 Ivanti Connect Secure Authentication Bypass by Spoofingwrite-up | [ HIGH ] | 8.6 | 88.9% | |
| CVE-2025-22457 Ivanti Connect Secure, Policy Secure, and ZTA Gateways Stack-Based Buffer Overflow Vulnerabilityransomware use | [ CRITICAL ] | 9.0 | 100.0% | |
| CVE-2025-0282 Ivanti Connect Secure, Policy Secure, and ZTA Gateways Stack-Based Buffer Overflow Vulnerabilityransomware use | [ CRITICAL ] | 9.0 | 100.0% | |
| CVE-2024-21893 Ivanti Connect Secure, Policy Secure, and Neurons Server-Side Request Forgery (SSRF) Vulnerabilityransomware use | [ HIGH ] | 8.2 | 100.0% | |
| CVE-2024-21887 Ivanti Connect Secure / Policy Secure Command Injectionransomware usewrite-up | [ CRITICAL ] | 9.1 | 100.0% | |
| CVE-2023-46805 Ivanti Connect Secure / Policy Secure Authentication Bypassransomware usewrite-up | [ HIGH ] | 8.2 | 100.0% |