CVE-2026-44075Network attack vector

Session option misprocessing via switch fall-through

Published May 21, 2026 · Updated May 21, 2026

Incorrect control flow in DSI OpenSession in Netatalk 1.5.0 through 4.4.2 allows remote attackers to alter session option handling. The DSIOPT_ATTNQUANT case omits a break, so crafted input also enters DSIOPT_SERVQUANT, an option handler the server otherwise ignores. The CNA reports a minor unauthenticated service disruption, but Netatalk found no state corruption or meaningful security impact.

CVSS severity3.7
Low
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect control flow in DSI OpenSession in Netatalk 1.5.0 through 4.4.2 allows remote attackers to alter session option handling. The DSIOPT_ATTNQUANT case omits a break, so crafted input also enters DSIOPT_SERVQUANT, an option handler the server otherwise ignores. The CNA reports a minor unauthenticated service disruption, but Netatalk found no state corruption or meaningful security impact.

The record

CVE
CVE-2026-44075
Published
May 21, 2026
Updated
May 21, 2026
Vendor
Netatalk
Product
Netatalk
Classifications
CWE-484, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 21, 2026CVE publishedPublication date reported by the CVE source.
  2. May 21, 2026Record 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=1.5.0 <=4.4.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Netatalk · Netatalkversion=1.5.0 <=4.4.2

Published CVSS scores

3.7Securin CNACVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
0.0NetatalkCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:N
3.7UbuntuCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

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-484Omitted Break Statement in Switch
T1499Endpoint Denial of Service

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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