Threats / Ivanti / CVE-2024-21887
CVE-2024-21887
· EUVD no mirror located
· GCVE no mirror located
Verified 2026-09-19
Ivanti Connect Secure and Policy vulnerability
Ivanti Connect Secure and Policy Secure contain a command injection vulnerability in web components allowing authenticated administrators to execute arbitrary code on affected appliances.
Verdict
Today item, not a backlog item.
An authenticated attacker can inject commands through crafted web requests to achieve remote code execution on Ivanti Connect Secure and Policy Secure appliances. When combined with CVE-2023-46805, unauthenticated attackers may bypass authentication and exploit this vulnerability.
CISA KEV Yes · 2024-01-105Ransomware use Flagged5EPSS 0.99999 (verify live)6Exploit Weaponized · public PoC7CVSS 9.13CISA SSVC Exploitation: active · Automatable: no · Impact: total4
01
Is it exploitable?
— the evidence, ranked above the scoreExploit available
Fully weaponized — public exploit code is cataloged for this vulnerability.We link the existence of the exploit; we do not host or redistribute payloads.
Reported exploitation
956 independent public reports of in-the-wild exploitation are cataloged.Distinct reporting sources (vendor, incident response, government); open them for the underlying claims.
Exploited in the wild
Listed in the CISA Known Exploited Vulnerabilities catalog (added 2024-01-10), flagged for known ransomware use.
Probability (EPSS)
EPSS 0.99999 — modeled likelihood of exploitation activity.EPSS is a daily-changing model output — open the source for today's value.
Severity / affected
CVSS 9.1 (CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H) · Affected: Ivanti, Connect Secure and Policy Secure. Confirm exact fixed builds in the vendor advisory.CVSS — CNA-assigned (CVE.org), version 3.0, set at disclosure.
Weakness (CWE)
Mapped to CWE-77 Command Injection — weakness family: Injection.CWE assignment from the public NVD record (may be stale); the weakness class drives how the flaw is exploited.
CISA SSVC (triage disposition)
Exploitation: active · Automatable: no · Technical Impact: totalCISA's own stakeholder-specific triage inputs, published in the CVE record (CISA Coordinator role). NOTE: this is CISA's three decision points; the final Act/Attend/Track decision also requires a Mission & Well-being input not published here, so no overall decision is asserted.
Currency of the record
CISA added this to its KEV catalog the same day the CVE record was published.KEV lag = CISA-KEV dateAdded − CVE.org datePublished; a floor on how long the known-exploited flaw sat in the public record before the federal catalog listed it. Severity/weakness here is CNA- or CISA-assigned (current at disclosure), independent of NVD's analysis backlog.
Public exploit available
Public exploit tooling is catalogued for this CVE (a functional/weaponized public exploit). Catalog entries: Metasploit module, nuclei template. We link the catalog page(s) only — no payload or code is hosted or restated here.Link, never host — the catalog page is the source; basicsecurity.net does not redistribute payloads.
02
Who’s exploiting it?
— attribution turns risk into urgencyVolt Typhoon State-sponsored (PRC)
CISA, NSA and FBI's AA24-038A attributes pre-positioning on US critical-infrastructure IT networks to Volt Typhoon, naming the group's exploitation of public-facing appliance vulnerabilities including the Ivanti Connect Secure (CVE-2024-21887) and Fortinet FortiOS (CVE-2022-42475) CVEs.17
03
Why it matters
— the attack path, told twice: adversary, then board1
Front door — unauthenticated access narrative 1
Attacker
I exploit CVE-2023-46805 to bypass authentication and gain administrative access to the appliance.
Business
Security perimeter is compromised as authentication controls fail to prevent unauthorized administrative access.
2
Keys to the kingdom — privilege/identity takeover narrative 2
Attacker
I craft malicious web requests containing command injection payloads and send them to the vulnerable web components.
Business
Input validation failures allow arbitrary code execution within the appliance infrastructure.
3
Lateral reach — past segmentation narrative 3
Attacker
I execute arbitrary commands with appliance privileges to establish persistence, exfiltrate data, or deploy ransomware.
Business
Complete compromise of VPN and policy infrastructure enables lateral movement, data theft, and operational disruption through ransomware deployment.
04
What to do
— defensible action- Remediate per the vendor advisory — confirm the fixed build for your version and verify exposure.1
Say it to the boardA vulnerability with this evidence profile is a defensible budget line, not a backlog ticket — fund the change against the proof above.
05
Coverage & confidence
— what we know, and what we don’tEstablished (cited)
Coverage gaps — stated, not hidden
Disclosure & credit2
Catalogued by hackeroneCNA
Credited with finding itNo finder is named in the public CVE record or the scanned vendor advisory — attribution scoped to the sources checked.
Found an error? Propose a correction.
A correction is a cited counter-claim — it must cite a source,
gets reviewed by a second human, and is never auto-applied. See the
correction convention and our identity
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