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PatchSiren cyber security CVE debrief

CVE-2021-22894 Ivanti CVE debrief

CVE-2021-22894 is a buffer overflow vulnerability in Ivanti Pulse Connect Secure Collaboration Suite. CISA lists it in the Known Exploited Vulnerabilities catalog, which indicates it has been observed as exploited and should be prioritized for remediation.

Vendor
Ivanti
Product
Pulse Connect Secure
CVSS
Unknown
CISA KEV
Listed
Original CVE published
2021-11-03
Original CVE updated
2021-11-03
Advisory published
2021-11-03
Advisory updated
2021-11-03

Who should care

Organizations running Ivanti Pulse Connect Secure, especially administrators responsible for remote access, VPN, and collaboration features, should treat this as a high-priority issue. Security and vulnerability management teams should confirm whether affected systems are present and patched.

Technical summary

The vulnerability is described as a buffer overflow in the Pulse Connect Secure Collaboration Suite component. The source corpus does not provide deeper technical impact details, but CISA's KEV inclusion confirms active exploitation risk and requires prompt vendor-directed updating.

Defensive priority

High. This is a CISA Known Exploited Vulnerability with a required remediation timeline, so affected deployments should be prioritized ahead of routine patching.

Recommended defensive actions

  • Apply updates per vendor instructions on all affected Ivanti Pulse Connect Secure systems.
  • Inventory all Pulse Connect Secure deployments to confirm whether the Collaboration Suite component is exposed or enabled.
  • Validate that remediation was completed before the CISA KEV due date of 2022-05-03 for historical tracking and audit purposes.
  • Monitor for vendor guidance and ensure compensating controls are in place until patching is complete.

Evidence notes

The CVE record and CISA KEV source both date this issue to 2021-11-03. CISA's KEV entry identifies the vulnerability as known exploited, lists the required action as applying updates per vendor instructions, and sets a due date of 2022-05-03. The corpus does not provide CVSS scoring.

Sources and references

Verified primary and authoritative sources

  • CVE-2021-22894 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2021-22894

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2021-22894 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2021-22894

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

  • CISA Known Exploited Vulnerabilities catalog

    Publisher, destination, and source semantics verified

    URL: https://www.cisa.gov/known-exploited-vulnerabilities-catalog

    Cybersecurity and Infrastructure Security Agency - Official CISA catalog of vulnerabilities known to be exploited in the wild.

Supplemental references

  • Source item URL

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json

    cisa_kev

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.