CVE-2021-22894

HIGH

8.8

CVSS Score

Published: May 27, 2021 at 11:15 AM UTC

Updated: June 17, 2026 at 03:37 AM UTC

2 products affected across 2 vendorsConnect SecurePulse Connect Secure

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Severity

HIGH8.8

Exploitation

CISA KEV

Exploit prediction

EPSS 41%

SSVC

Active

Actively Exploited

CISA Known Exploited Vulnerabilities (KEV) Catalog

EPSS Score41.3%

EPSS (Exploit Prediction Scoring System) estimates a 41.3% chance this CVE is exploited in the wild within the next 30 days — higher than 99% of all CVEs. It complements CVSS: a high EPSS on a mid-severity CVE can still be urgent.

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.

Required Action

Apply updates per vendor instructions.

Ransomware Use

Unknown

Added to KEV

Nov 3, 2021

Remediation Due

May 3, 2022

1641 days overdue

Notes

Reference CISA's ED 21-03 (https://www.cisa.gov/news-events/directives/ed-21-03-mitigate-pulse-connect-secure-product-vulnerabilities) for further guidance and requirements. Note: The due date for addressing this vulnerability aligns with the requirements outlined in ED 21-03. https://nvd.nist.gov/vuln/detail/CVE-2021-22894

Description

A buffer overflow vulnerability exists in Pulse Connect Secure before 9.1R11.4 allows a remote authenticated attacker to execute arbitrary code as the root user via maliciously crafted meeting room.