CVE-2021-22894

HIGHNVD 8.88.8—Trending — 5 sources updated this week

8.8

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 v3: 8.8
EG Score: 8.8(medium)
EPSS: 96.2%
KEV: ⚠ Exploited

Published

May 27, 2021

Last Modified

December 18, 2025

References (3)

support@hackeronehttps://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44784/?kA23Z000000boUWSAY
af854a3a-2127-422b-91ae-364da2661108https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44784/?kA23Z000000boUWSAY
134c704f-9b21-4f2e-91b3-4a467353bcc0https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-22894

Weakness Classification(3)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 10× in last 7d / 10× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-28 13:43 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-27 20:35 UTCkev_newly_listed
2026-05-27 13:39 UTCepss_batch
2026-05-26 19:13 UTCkev_newly_listed
2026-05-26 16:00 UTCEG score recompute
2026-05-26 16:00 UTCGHSA enrichment
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-25 07:07 UTCOSV refresh

Frequently asked(6)

What is CVE-2021-22894?

CVE-2021-22894 is a high vulnerability published on May 27, 2021. 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.

When was CVE-2021-22894 disclosed?

CVE-2021-22894 was first published in the National Vulnerability Database on May 27, 2021, with the most recent update on December 18, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-22894 actively exploited?

Yes. CISA added CVE-2021-22894 to the Known Exploited Vulnerabilities catalog on November 3, 2021, affecting Ivanti Pulse Connect Secure. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.

What is the CVSS score of CVE-2021-22894?

CVE-2021-22894 has a CVSS v3 base score of 8.8 (NVD).

Which products are affected by CVE-2021-22894?

CVE-2021-22894 affects Ivanti Pulse Connect Secure. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.

How do I remediate CVE-2021-22894?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-22894, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2021-22894

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CVE-2021-22894

📅 Published

🔄 Last Modified

🔗 References (3)