CVE-2023-46803Network attack vector

Unauthenticated DoS via malformed server packets

Published Dec 19, 2023 · Updated Aug 2, 2024

Out-of-bounds write in Ivanti Avalanche 6.4.1 allows remote attackers to cause denial of service via crafted Mobile Device Server packets. The Mobile Device Server packet parser writes beyond a memory boundary when processing specially crafted data, corrupting memory. No authentication or user interaction is required; exploitation can interrupt the service, with no confidentiality or integrity impact reported.

CVSS severity7.5
High
EPSS probability4.15%
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 write in Ivanti Avalanche 6.4.1 allows remote attackers to cause denial of service via crafted Mobile Device Server packets. The Mobile Device Server packet parser writes beyond a memory boundary when processing specially crafted data, corrupting memory. No authentication or user interaction is required; exploitation can interrupt the service, with no confidentiality or integrity impact reported.

The record

CVE
CVE-2023-46803
Published
Dec 19, 2023
Updated
Aug 2, 2024
Vendor
Ivanti
Product
Avalanche
Classifications
CWE-787, T1499
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

7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5HackerOneCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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.

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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
T1499Endpoint Denial of Service

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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