CVE-2023-46261Network attack vector

Unauthenticated code execution via heap buffer overflow

Published Dec 19, 2023 · Updated Aug 2, 2024

Heap-based buffer overflow in Ivanti Avalanche 6.4.1 allows remote attackers to execute code as SYSTEM through WLInfoRailService. The service fails to validate the length of user-supplied data before copying it into a heap-based buffer. No authentication or user interaction is required; a crafted network packet can crash the service or run attacker-controlled code with SYSTEM privileges.

CVSS severity9.8
Critical
EPSS probability11.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap-based buffer overflow in Ivanti Avalanche 6.4.1 allows remote attackers to execute code as SYSTEM through WLInfoRailService. The service fails to validate the length of user-supplied data before copying it into a heap-based buffer. No authentication or user interaction is required; a crafted network packet can crash the service or run attacker-controlled code with SYSTEM privileges.

The record

CVE
CVE-2023-46261
Published
Dec 19, 2023
Updated
Aug 2, 2024
Vendor
Ivanti
Product
Avalanche
Classifications
CWE-787, T1210
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
9.8HackerOne CNACVSS: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 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-787Out-of-bounds Write
T1210Exploitation of Remote Services

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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