What it is
CVE-2024-21887 is a vulnerability affecting Ivanti ICS, IPS. 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...
Vulnerability report
Exploited in the wild
Confirmed confidence
In CISA KEV
CVE-2024-21887
ICS Command Injection
Ivanti / ICS · 9.1R18 to <= 9.1R18
- Severity
- CVSS 9.1 · Critical
- Confidence
- Confirmed
- Exploit status
- Exploited in the wild
- EPSS
- 100.0%
- First observed
- —
- Last observed
- —
Decision summary
What security teams need to know first
Direct answers before the deeper technical record.
Is it exploited?
Yes. Previdian tracks this CVE as a known exploited vulnerability. Confidence is confirmed. Listed in CISA KEV. Also confirmed by third-party sources.
Who is affected?
Ivanti / ICS 9.1r18 to <= 9.1r18.
What should we do?
Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
Overview
ICS Command Injection
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.
Vendor
Product
Affected
Status
Ivanti
Affected
ICS
Through 9.1R18
Through 22.6R2
Affected
Ivanti
Affected
IPS
Through 9.1R18
Through 22.6R1
Affected
- Published
- 12 Jan 2024
- Exploitation Reported
- 10 Jan 2024
- Attack vector
- Remote
- Complexity
- Low
- Privileges
- High
- User interaction
- None
Tags
edge
cisa
nuclei_scanner
metasploit
malware
CVE References
- CVE Record CVE.org · CVE Record https://www.cve.org/CVERecord?id=CVE-2024-21887
- forums.ivanti.com/s/article/CVE-2023-46805-Authentication-Bypa... forums.ivanti.com · CVE Record https://forums.ivanti.com/s/article/CVE-2023-46805-Authentication-Byp...
- packetstormsecurity.com/files/176668/Ivanti-Connect-Secure-Unauthent... packetstormsecurity.com · CVE Record http://packetstormsecurity.com/files/176668/Ivanti-Connect-Secure-Una...
Exploitation evidence
Why Previdian marks this CVE as exploited
Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.
Exploited in the wild
CISA
A trusted third party reported exploitation.
Used in malware
CISA
Malware families have been linked to exploitation of this CVE.
Proof of concept available
Public scanner or PoC coverage increases practical exploitability.
Known exploited vulnerability sources
Per-source evidence links for KEV attestations are available through the Previdian Pro API.
Learn about Pro API access| Source | Added |
|---|---|
| CISA First | 2024-01-10 00:00 UTC |
| The Shadowserver | 2026-05-28 00:00 UTC |
| Tenable Blog | 2026-06-02 14:20 UTC |
| CVE | 2026-08-04 04:41 UTC |
| The Hacker News | 2026-10-05 15:35 UTC |
Detection
Operational artifacts and observed signals
Make the evidence actionable in scanner, SOC, and edge-control workflows.
Observed signals
- Request targets
- User-Agents
- Callback hosts
- 0
- 0
- 0
Request targets and User-Agents available in Pro. Callback host details available in Enterprise.
Scanner coverage
Metasploit template detected 29 Apr 2025.
View Metasploit template (opens in new tab)Virtual patch status
No Previdian virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.
Learn about virtual patches →Scanner Artifacts
Scanner and exploit-framework references linked to this CVE.
| Scanner | Reference | Detected |
|---|---|---|
| Metasploit | https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/linux/http/ivanti_connect_secure_rce_cve_2024_21893.rb | 29 Apr 2025 |
| Nuclei | https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2024/CVE-2024-21887.yaml | 25 Apr 2025 |
Risk and context
Severity, weaknesses, and research context
CVSS v3.1
9.1
Critical
Potential damage if exploited. Separate from whether attackers are using it.
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
EPSS
100.0%
Estimated chance of exploitation in the next 30 days. Previdian's warning comes from evidence, not this score.
Weaknesses
Recent mention · The Hacker News
Realtek Jungle SDK Exploit Attempts Deliver Cling Botnet With STUN-Based C2
Ravie LakshmananOct 05, 2026Vulnerability / Malware Threat actors have been observed attempting to exploit a now-patched critical security flaw impacting the Realtek Jungle software development kit (SDK) to deploy a botnet malware called Cling. "Cling is notable not because...
Read full advisoryAll CVSS Scores
CVSS v3.1
9.1
Critical
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
CVSS v3.0
9.1
Critical
CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
All Mentions
Recent mention · The Hacker News
Realtek Jungle SDK Exploit Attempts Deliver Cling Botnet With STUN-Based C2The Hacker News · 05 Oct 2026
Ravie LakshmananOct 05, 2026Vulnerability / Malware Threat actors have been observed attempting to exploit a now-patched critical security flaw impacting the Realtek Jungle software development kit (SDK) to deploy a botnet malware called Cling. "Cling is notable not because it introduces a new propagation technique, but because it repurposes ordinary STUN behavior into a practical command-and-control channel," Nozomi Networks said in a report published last week. "The result is a botnet whose traffic can resemble legitimate NAT-traversal activity while still supporting propagation,...
Recent mention · Tenable Blog
Inside the customer environment: Where threat actors, vulnerabilities, and exposed assets intersectTenable Blog · 27 May 2026
Tenable Research has developed a graph-based model linking 600+ threat groups to real-world customer exposures. It reveals which vulnerabilities sit at the intersection of severity, active exploitation, and organizational risk.Key takeawaysThe "patch everything" strategy is dead: Vulnerability prioritization based on exploitation risk offers a path forward. A directed graph model linking 600+ threat actors to vulnerabilities in 7,800 customer environments reveals that 68% of organizations carry at least one CVE previously exploited by a named adversary, and 321 tracked threat groups can...
Recent mention · Google Threat Intelligence
Written by: Casey Charrier, James Sadowski, Clement Lecigne, Vlad Stolyarov Executive Summary Google Threat Intelligence Group (GTIG) tracked 75...Google Threat Intelligence · 29 Apr 2025
Written by: Casey Charrier, James Sadowski, Clement Lecigne, Vlad Stolyarov Executive Summary Google Threat Intelligence Group (GTIG) tracked 75 zero-day vulnerabilities exploited in the wild in 2024, a decrease from the number we identified in 2023 (98 vulnerabilities), but still an increase from 2022 (63 vulnerabilities). We divided the reviewed vulnerabilities into two main categories: end-user platforms and products (e.g., mobile devices, operating systems, and browsers) and enterprise-focused technologies, such as security software and appliances. Vendors continue to drive...
Potential Proof of Concepts
These PoCs are unverified and could contain malware. Use at your own risk.
Ivanti Connect Secure (9.x, 22.x) and Ivanti Policy Secure (9.x, 22.x) - Command Injection
nuclei · Created Unknown
ivanti_connect_secure_rce_cve_2024_21893
metasploit · Created Unknown
Metasploit module for CVE-2024-21887
ivanti_connect_secure_rce_cve_2023_46805
metasploit · Created Unknown
Metasploit module for CVE-2024-21887
Timeline
From disclosure to observed exploitation
-
15:35 UTC
KEV confirmed by The Hacker News
Exploitation attested by an external source
-
04:41 UTC
KEV confirmed by CVE
Exploitation attested by an external source
-
14:20 UTC
KEV confirmed by Tenable Blog
Exploitation attested by an external source
-
14:08 UTC
First public exploitation report
Exploit observed in malware
-
00:00 UTC
KEV confirmed by The Shadowserver
Exploitation attested by an external source
-
10:58 UTC
Metasploit module available
Exploit module available
-
15:02 UTC
Public PoC available
Public proof-of-concept code published
-
00:00 UTC
Nuclei template available
Scanner coverage available
-
17:02 UTC
CVE published
Vulnerability disclosed publicly
-
00:00 UTC
Added to CISA KEV
Listed in the CISA Known Exploited Vulnerabilities catalog
-
01:04 UTC
CVE ID reserved
Identifier reserved by the CNA
Pro API
Automate this intelligence
Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.
- Evidence confidence and provenance
- First-party sensor telemetry
- PoC and scanner references
- Affected versions and enrichment
- Automation-ready JSON delivery
GET /api/v2/pro/kevs/CVE-2024-21887
Free JSON includes basic KEV fields{
"cve_id": "CVE-2024-21887",
"confidence": "Confirmed",
"cvss_score": 9.1,
"cvss_estimated": false,
"epss_score": 0.99999,
"exploit_status": {
"exploited_in_the_wild": true,
"active_exploitation_observed": false
},
"sensor_telemetry": { "attempts": 0, "sensors": 0 }
}