CVE-2026-44050Public exploitNetwork attack vector

Code execution via unchecked CNID name length

Published May 21, 2026 · Updated May 21, 2026

Heap-based buffer overflow in Netatalk 2.0.0 through 4.4.2 allows remote authenticated users to execute code or crash the CNID service. The comm_rcv() function trusts rqst->namelen from the network and copies that many bytes into a 1,025-byte heap buffer without bounds validation. Exploitation requires access through an AFP session or the local CNID socket and a volume using the dbd backend; consequences include daemon-level code execution or a service crash.

CVSS severity9.9
Critical
EPSS probability0.42%
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 Netatalk 2.0.0 through 4.4.2 allows remote authenticated users to execute code or crash the CNID service. The comm_rcv() function trusts rqst->namelen from the network and copies that many bytes into a 1,025-byte heap buffer without bounds validation. Exploitation requires access through an AFP session or the local CNID socket and a volume using the dbd backend; consequences include daemon-level code execution or a service crash.

The record

CVE
CVE-2026-44050
Published
May 21, 2026
Updated
May 21, 2026
Vendor
Netatalk
Product
Netatalk
Classifications
CWE-122, T1210
Attack vector
network
Privileges
authenticated

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=2.0.0 <=4.4.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Netatalk · Netatalkversion=2.0.0 <=4.4.2

Published CVSS scores

9.9securinCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/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.

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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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow
T1210Exploitation of Remote Services

Public exploit references

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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