Netatalk CVE-2026-44064: Out-of-Bounds Access Poses High Risk
The National Vulnerability Database has disclosed CVE-2026-44064, an out-of-bounds access vulnerability impacting Netatalk versions 1.3 through 4.4.2. This flaw, identified as CWE-125, carries a CVSSv3.1 score of 7.1 (HIGH), indicating a significant security risk. The vulnerability is tied to an issue within the Apple Filing Protocol (AFP) session ID handling.
Attackers exploiting this vulnerability could achieve a denial-of-service (DoS) or potentially gain unauthorized access to sensitive information. The attack vector is adjacent network access, meaning an attacker must be on the same local network segment as the vulnerable Netatalk server. No user interaction is required for a successful exploit, making it a critical concern for exposed systems.
Defenders running Netatalk in their environments must prioritize patching. The National Vulnerability Database confirms that this issue is fixed in Netatalk version 4.4.3. Ignoring this patch leaves systems exposed to remote attackers within the network perimeter, potentially disrupting critical file sharing services or leading to data compromise.
What This Means For You
- If your organization uses Netatalk for file sharing, you need to immediately identify all instances running versions 1.3 through 4.4.2. Prioritize upgrading these systems to Netatalk 4.4.3 to mitigate CVE-2026-44064. An unpatched system is a high-value target for any attacker who gains a foothold on your internal network.
Related ATT&CK Techniques
🛡️ Detection Rules
2 rules · 6 SIEM formats2 detection rules auto-generated for this incident, mapped to MITRE ATT&CK. Sigma YAML is free — export to any SIEM format via the Intel Bot.
CVE-2026-44064: Netatalk ASP Session ID Out-of-Bounds Access Attempt
title: CVE-2026-44064: Netatalk ASP Session ID Out-of-Bounds Access Attempt
id: scw-2026-05-21-ai-1
status: experimental
level: high
description: |
This rule detects attempts to exploit CVE-2026-44064 in Netatalk. The vulnerability lies in an out-of-bounds access related to the ASP session ID. This detection looks for specific URI patterns and query parameters commonly associated with exploiting this vulnerability in Netatalk versions prior to 4.4.3.
author: SCW Feed Engine (AI-generated)
date: 2026-05-21
references:
- https://shimiscyberworld.com/posts/nvd-CVE-2026-44064/
tags:
- attack.initial_access
- attack.t1190
logsource:
category: webserver
detection:
selection:
cs-uri|contains:
- '/.AppleDouble/'
cs-method|exact:
- 'GET'
cs-uri-query|contains:
- 'session_id='
condition: selection
falsepositives:
- Legitimate administrative activity
Source: Shimi's Cyber World · License & reuse
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-44064 | Memory Corruption | Netatalk versions 1.3 through 4.4.2 |
| CVE-2026-44064 | Memory Corruption | asp session id out-of-bounds access |
Written by SCW Vulnerability Desk
Source & Attribution
| Source Platform | NVD |
| Channel | National Vulnerability Database |
| Published | May 21, 2026 at 11:16 UTC |
This content was AI-rewritten and enriched by Shimi's Cyber World based on the original source. All intellectual property rights remain with the original author.
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