Threat Intelligence / CVE / CVE-2024-21887

CVE-2024-21887 — Ivanti Connect Secure

CISA KEVRansomware

CVSS v3.1 9.1 (CRITICAL) · EPSS 94.4% (higher than 99.9% of all scored CVEs) · Priority 10/10 · Published 2024-01-12

As of 2025-10-31, CVE-2024-21887 is a CRITICAL-severity vulnerability in Ivanti Connect Secure, CVSS v3.1 9.1, EPSS 94.4% (99.9th percentile). It is listed in the CISA Known Exploited Vulnerabilities catalog (added 2024-01-10), with a US federal remediation deadline of 2024-01-22, and CISA links it to known ransomware campaigns. Threadlinqs Intelligence links 5 tracked threat campaigns to CVE-2024-21887, most recently “DragonForce Ransomware Attack on RubberMill, Inc. — ~340GB Data Exfiltration Including PII, Credentials, CAD Files with Defense Mil-Spec References”.

Last updated: 2025-10-31

What is CVE-2024-21887?

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.

The record classifies CVE-2024-21887 under weakness class CWE-77. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs high-privilege credentials, needs no user interaction, and has high impact on confidentiality, integrity, availability. 81 affected-product entries are recorded, across 1 vendor, listed below. The identifier was first published 975 days ago.

Severity and exploitation probability

CVSS v3.1 base score: 9.1 — CRITICAL
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
EPSS (FIRST): 94.4% probability of exploitation in the next 30 days, higher than 99.9% of all scored CVEs
CISA KEV: Listed since 2024-01-10, federal remediation deadline 2024-01-22 — used in known ransomware campaigns
Threadlinqs priority: 10/10 — CISA lists it as used in ransomware, which Threadlinqs scores at the maximum
Published: 2024-01-12, last modified 2025-10-31

Is CVE-2024-21887 being exploited?

CISA added CVE-2024-21887 to the Known Exploited Vulnerabilities catalog on 2024-01-10, which means the agency holds evidence of exploitation in the wild; US federal civilian agencies had to remediate it by 2024-01-22 under BOD 22-01. CISA flags the vulnerability as one used in known ransomware campaigns. It currently carries a trending score of 40 in the Threadlinqs vulnerability feed.

Affected products and versions

Ivanti: Connect Secure 9.0, Connect Secure 9.1, Connect Secure 22.1, Connect Secure 22.2, Connect Secure 22.3, Connect Secure 22.4, Connect Secure 22.5, Connect Secure 22.6, Policy Secure 9.0, Policy Secure 9.1, Policy Secure 22.1, Policy Secure 22.2, Policy Secure 22.3, Policy Secure 22.4, Policy Secure 22.5, Policy Secure 22.6

Showing 16 of 81 recorded product entries.

How to fix CVE-2024-21887

The record marks a vendor fix as available for CVE-2024-21887. Patch reference: https://forums.ivanti.com/s/article/CVE-2023-46805-Authentication-Bypass-CVE-2024-21887-Command-Injection-for-Ivanti-Connect-Secure-and-Ivanti-Policy-Secure-Gateways. Vendor advisory: https://forums.ivanti.com/s/article/CVE-2023-46805-Authentication-Bypass-CVE-2024-21887-Command-Injection-for-Ivanti-Connect-Secure-and-Ivanti-Policy-Secure-Gateways?language=en_US. Because CVE-2024-21887 is KEV-listed, US federal civilian agencies were required to apply the vendor fix, or stop using the product, by 2024-01-22. Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory.

Threat activity tracking CVE-2024-21887

5 tracked threats in the Threadlinqs corpus reference CVE-2024-21887, either in the campaign’s CVE list or as an indicator on the campaign record.

DragonForce Ransomware Attack on RubberMill, Inc. — ~340GB Data Exfiltration Including PII, Credentials, CAD Files with Defense Mil-Spec References — CRITICAL · 2026-09-06
Sen. Wyden Urges Binding Federal Mandate to Purge Internet-Facing Legacy VPNs for Zero-Trust Remote Access — MEDIUM · 2026-07-27
APT35 (Charming Kitten) GCC Pre-Positioning Cyber Reconnaissance Campaign Enabling Kinetic Targeting — CRITICAL · 2026-04-09
Storm-1175 Medusa Ransomware Zero-Day Exploitation Campaign (CVE-2026-23760, CVE-2025-10035) — CRITICAL · 2026-04-06
BRICKSTORM Backdoor: UNC5221 PRC-Nexus APT Targeting VMware vSphere Infrastructure — CRITICAL · 2026-04-02

Sources

Seeded from nvd and not yet processed by the Threadlinqs enrichment pipeline, so blank CVSS, EPSS or KEV fields above mean NOT MEASURED rather than measured-absent.

Full detection coverage & IOCs for threats exploiting CVE-2024-21887 are available via the Threadlinqs MCP server (Purple tier). View plans →

← all vulnerabilities · Markdown version · Threadlinqs Intelligence