CVE-2024-23528Network attack vector

Memory disclosure via unchecked buffer read

Published Apr 19, 2024 · Updated Aug 1, 2024

Out-of-bounds read in Ivanti Avalanche before 6.4.3 allows remote attackers to read sensitive data from WLAvalancheService memory. The service on default TCP port 1777 fails to validate user-supplied data before reading past the end of an allocated buffer. No authentication or user interaction is required; alone, the flaw discloses memory, while code execution requires chaining with another flaw.

CVSS severity5.3
Medium
EPSS probability1.88%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in Ivanti Avalanche before 6.4.3 allows remote attackers to read sensitive data from WLAvalancheService memory. The service on default TCP port 1777 fails to validate user-supplied data before reading past the end of an allocated buffer. No authentication or user interaction is required; alone, the flaw discloses memory, while code execution requires chaining with another flaw.

The record

CVE
CVE-2024-23528
Published
Apr 19, 2024
Updated
Aug 1, 2024
Vendor
Ivanti
Product
Avalanche
Classifications
CWE-125
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 19, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 1, 2024Record 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=0 <6.4.3
  2. Affected versionversion=6.4.3 <6.4.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Ivanti · Avalancheversion=0 <6.4.3; version=6.4.3 <6.4.3

Published CVSS scores

5.3HackerOne CNACVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read

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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