CVE-2026-44058Public exploitNetwork attack vector

Arbitrary-user impersonation via admin password fallback

Published May 21, 2026 · Updated May 21, 2026

Authentication bypass in Netatalk 2.2.2 through 4.4.2 allows remote authenticated users to assume any local user's identity over AFP. After a normal login fails, afpd retries the configured admin auth user and password but creates the session for the originally requested username. The option is disabled by default, and exploitation requires the administrative password; a successful login receives the target user's AFP access.

CVSS severity6.4
Medium
EPSS probability0.53%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Netatalk 2.2.2 through 4.4.2 allows remote authenticated users to assume any local user's identity over AFP. After a normal login fails, afpd retries the configured admin auth user and password but creates the session for the originally requested username. The option is disabled by default, and exploitation requires the administrative password; a successful login receives the target user's AFP access.

The record

CVE
CVE-2026-44058
Published
May 21, 2026
Updated
May 21, 2026
Vendor
Netatalk
Product
Netatalk
Classifications
CWE-287, T1078
Attack vector
network
Privileges
admin

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=2.2.2 <=4.4.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Netatalk · Netatalkversion=2.2.2 <=4.4.2

Published CVSS scores

6.4NetatalkCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-287Improper Authentication
T1078Valid Accounts

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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