CVE-2023-46258Network attack vector

Unauthenticated code execution via unchecked buffer copy

Published Dec 19, 2023 · Updated Aug 2, 2024

Stack-based buffer overflow in Ivanti Avalanche 6.4.1 allows remote attackers to execute arbitrary code through the Mobile Device Server. WLAvalancheService copies user-supplied data into a stack buffer without first validating its length, corrupting adjacent memory. No authentication or user interaction is required, and successful exploitation runs code as SYSTEM; malformed traffic can instead crash the service.

CVSS severity9.8
Critical
EPSS probability6.78%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in Ivanti Avalanche 6.4.1 allows remote attackers to execute arbitrary code through the Mobile Device Server. WLAvalancheService copies user-supplied data into a stack buffer without first validating its length, corrupting adjacent memory. No authentication or user interaction is required, and successful exploitation runs code as SYSTEM; malformed traffic can instead crash the service.

The record

CVE
CVE-2023-46258
Published
Dec 19, 2023
Updated
Aug 2, 2024
Vendor
Ivanti
Product
Avalanche
Classifications
CWE-787, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 19, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 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=6.4.1 <=6.4.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Ivanti · Avalancheversion=6.4.1 <=6.4.1

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8HackerOneCVSS:3.0/AV:N/AC:L/PR:N/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
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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