Netatalk CVE-2026-44062: High-Severity RCE Risk in Legacy File Sharing
The National Vulnerability Database has disclosed CVE-2026-44062, a high-severity vulnerability affecting Netatalk versions 2.0.4 through 4.4.2. This flaw, rated 7.5 CVSS (High), is rooted in a missing bounds check within the pull_charset_flags() function, categorized as CWE-787 (Out-of-bounds Write). This type of vulnerability often leads to remote code execution (RCE) or denial-of-service, giving attackers significant control over affected systems.
Netatalk, an open-source implementation of the Apple Filing Protocol (AFP), is commonly used to allow Unix-like operating systems to serve files to macOS clients. While its use has declined with the advent of SMB, many legacy systems still rely on it. The vulnerability’s CVSS vector (AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H) indicates it can be exploited remotely with low privileges and high impact on confidentiality, integrity, and availability, albeit with high attack complexity.
Defenders must recognize that AC:H (high attack complexity) does not mean low risk. Attackers are constantly finding new ways to weaponize complex vulnerabilities. The patch, available in Netatalk 4.4.3, is critical. Any organization still running Netatalk should immediately audit their environment for vulnerable versions and prioritize upgrading or isolating these systems. This is a clear indicator that legacy services, even those with diminishing use, remain high-value targets if not properly maintained.
What This Means For You
- If your organization still relies on Netatalk for file sharing, you are exposed. Check all systems running Netatalk for versions between 2.0.4 and 4.4.2 immediately. Prioritize upgrading to Netatalk 4.4.3 or newer, or isolate these services from untrusted networks. This isn't theoretical; unpatched legacy services are a favorite target for initial access.
Related ATT&CK Techniques
🛡️ Detection Rules
4 rules · 6 SIEM formats4 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.
Web Application Exploitation Attempt — CVE-2026-44062
title: Web Application Exploitation Attempt — CVE-2026-44062
id: scw-2026-05-21-1
status: experimental
level: high
description: |
Detects common exploitation patterns targeting web applications. Review CVE-2026-44062 advisories for specific indicators.
author: SCW Feed Engine (auto-generated)
date: 2026-05-21
references:
- https://shimiscyberworld.com/posts/nvd-CVE-2026-44062/
tags:
- attack.initial_access
- attack.t1190
logsource:
category: webserver
detection:
selection:
cs-uri-query|contains:
- '..'
- 'SELECT'
- 'UNION'
- '<script'
- 'cmd='
- '/etc/passwd'
condition: selection
falsepositives:
- Legitimate activity from CVE-2026-44062
Source: Shimi's Cyber World · License & reuse
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-44062 | Buffer Overflow | Netatalk versions 2.0.4 through 4.4.2 |
| CVE-2026-44062 | Memory Corruption | Netatalk function pull_charset_flags() |
| CVE-2026-44062 | Missing Bounds Check | Netatalk missing o_len bounds check |
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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