CISA KEV · Known exploitedHigh

CVE-2021-22894

Ivanti Pulse Connect Secure

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.

CVSS
8.8
EPSS
41.3%
98.5% percentile
CISA KEV
Listed
Published
2021.05.27
PRIORITY ASSESSMENT

Immediate review

CISA has listed this vulnerability in the Known Exploited Vulnerabilities catalog.

Known exploitationConfirmed by CISA KEV
Exploit probability41.3%
Technical severityCVSS 8.8

Vulnerability overview

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.

Affected product and versions

Product
Ivanti Pulse Connect Secure
Affected versions
Fixed version 9.1R11.4, 9.0, 9.1
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
CISA required action

Apply updates per vendor instructions.

Due date: 2022.05.03
  1. 1
    Identify

    Confirm that Ivanti Pulse Connect Secure and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-119, CWE-94
KEV added
2021.11.03
Ransomware use
미확인
CVE-2021-22894 — Ivanti Pulse Connect Secure | SECUFOCUS NOW