CVE-2024-27975Network attack vector

SYSTEM code execution via stale object operation

Published Apr 19, 2024 · Updated Dec 16, 2025

Use-after-free in WLAvalancheService in Ivanti Avalanche before 6.4.3 allows remote authenticated users to execute code as SYSTEM. The TCP 1777 service operates on an object without first validating that the object still exists, permitting access after it is freed. Valid Avalanche credentials and network access to the default service port are required; successful exploitation provides full SYSTEM privileges.

CVSS severity8.8
High
EPSS probability2.62%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in WLAvalancheService in Ivanti Avalanche before 6.4.3 allows remote authenticated users to execute code as SYSTEM. The TCP 1777 service operates on an object without first validating that the object still exists, permitting access after it is freed. Valid Avalanche credentials and network access to the default service port are required; successful exploitation provides full SYSTEM privileges.

The record

CVE
CVE-2024-27975
Published
Apr 19, 2024
Updated
Dec 16, 2025
Vendor
Ivanti
Product
Avalanche
Classifications
CWE-416, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 19, 2024CVE publishedPublication date reported by the CVE source.
  2. Dec 16, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.4.3
  2. Affected versionversion=6.4.3 <6.4.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Ivanti · Avalancheversion=6.4.3; version=6.4.3 <6.4.3

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.8HackerOneCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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