How severe is CVE-2024-21887?

CVE-2024-21887 has a CVSS score of 9.1/10, rated CRITICAL. Immediate patching is strongly recommended.

Which products are affected by CVE-2024-21887?

CVE-2024-21887 affects the following products: ivanti connect secure, ivanti policy secure.

How do I patch CVE-2024-21887?

No patch has shipped for CVE-2024-21887 yet — track the ivanti connect secure advisory for a fixed release and apply the workarounds below in the meantime.

How do I detect CVE-2024-21887 across my infrastructure?

Inventory every ivanti connect secure deployment and check each version against the affected-products list above.

How do I mitigate CVE-2024-21887 if there is no patch (or I can't update yet)?

Stop passing untrusted input into the interpreter or shell: call the affected binary with an argument array rather than a composed command string, reject anything outside a strict allowlist of expected values, and run the component under an account that cannot reach beyond the work it legitimately does. Alongside that, restrict the management interface to trusted networks and apply the vendor's recommended configuration mitigations.

Is CVE-2024-21887 actively exploited in the wild?

Yes. There are 18 known exploit references for CVE-2024-21887, including 12 in-the-wild exploitations observed on GitHub and other sources. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for CVE-2024-21887?

CVE-2024-21887 has an EPSS (Exploit Prediction Scoring System) score of 100.0%, placing it in the 100th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. A score above 50% indicates significantly elevated exploitation risk — immediate patching is strongly recommended.

Is CVE-2024-21887 in the CISA Known Exploited Vulnerabilities catalog?

Yes. CVE-2024-21887 (Ivanti Connect Secure and Policy Secure Command Injection Vulnerability) was added to CISA's Known Exploited Vulnerabilities (KEV) catalog on 2024-01-10. CISA required all US federal civilian agencies to remediate this vulnerability by 2024-01-22. The required action was: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. This CVE has been used in known ransomware campaigns. Being listed in the KEV catalog is the strongest possible confirmation of active exploitation — treat this as a critical priority.

What type of vulnerability is CVE-2024-21887?

CVE-2024-21887 is classified as CWE-77 (CWE-77). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

Which products and versions are affected by CVE-2024-21887?

CVE-2024-21887 affects ivanti connect secure (8 versions, e.g. 9.0, 9.1, 22.1…); ivanti policy secure (8 versions, e.g. 9.0, 9.1, 22.1…). Check the affected-products list on this page against your deployed version to confirm exposure.

Is there exploit tooling available for CVE-2024-21887?

A Nuclei detection template exists for CVE-2024-21887, meaning automated scanners can fingerprint it. 4 Metasploit modules reference CVE-2024-21887, which lowers the barrier to weaponization. Public exploit tooling significantly increases real-world risk — prioritize patching and ensure detection coverage. Exploit tooling should only ever be used in isolated, authorized testing environments.

When was CVE-2024-21887 published, and has it been updated?

CVE-2024-21887 was published on January 12, 2024 and was last updated on August 4, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🛡️

CISA KEV · ACTIVELY EXPLOITED

CRITICAL severity

CVE-2024-21887 — Connect Secure

CRITICAL

CVE-2024-21887 is a critical-severity (CVSS 9.1) CWE-77 vulnerability in ivanti connect secure. It is in CISA's Known Exploited Vulnerabilities catalog (added 2024-01-10) and has been used in ransomware campaigns — treat it as actively exploited and patch now. No vendor fix is recorded yet; mitigation options are listed below.

A command injection vulnerability in web components of Ivanti Connect Secure (9.x, 22.x) and Ivanti Policy Secure (9.x, 22.x) allows an authenticated administrator to send specially…

Published

Jan 12, 2024

Updated

Aug 4, 2026

Affected

2 products

Patched

See advisory

Exploits

18 known

Exploitation data as of Oct 5, 2026 · OSV.dev, NVD, CISA KEV, FIRST.org (EPSS)

Exploitation Status

Actively exploited in the wild

Confirmed by CISA's Known Exploited Vulnerabilities catalog on 2024-01-10 — including use in ransomware campaigns. Federal agencies were required to remediate by 2024-01-22.
A successful exploit gives an attacker total control of the affected component, not partial access.

Exploitation and automatability from CISA (KEV catalog and SSVC triage) for CVE-2024-21887.

EPSS Exploitation Probability

via FIRST.org ↗

100.0%probability of exploitation in next 30 days

Very High Risk0.00%

Lower risk than most CVEs100th percentile — riskier than 100% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

CVE-2024-21887 by exploitation likelihood (EPSS) against impact (CVSS). In the shaded patch-first corner (EPSS 50%+, CVSS 7.0+).

Where this sits among everything scored

Of 383,485 CVEs with a current EPSS score, this one falls in the ≥ 90% band (highlighted). Counts from FIRST.org, log-scaled.

Description

A command injection vulnerability in web components of Ivanti Connect Secure (9.x, 22.x) and Ivanti Policy Secure (9.x, 22.x) allows an authenticated administrator to send specially crafted requests and execute arbitrary commands on the appliance.

Affected Products

2 products · 81 configurations

Application

connect secureivanti

8 versions

9.09.122.122.222.322.422.522.6

Application

policy secureivanti

8 versions

9.09.122.122.222.322.422.522.6

Exploits & PoCs

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.