CVE-2026-7837
TOCTOU with root privilege in ad_flush
Description
A time-of-check time-of-use (TOCTOU) condition in the ad_flush function in Netatalk 3.0.0 through 4.4.2 involves root-privileged file operations, which may allow a remote attacker to cause limited data modification under specific race conditions.
INFO
Published Date :
May 21, 2026, 9:16 a.m.
Last Modified :
May 21, 2026, 9:16 a.m.
Remotely Exploit :
Yes !
Source :
33c584b5-0579-4c06-b2a0-8d8329fcab9c
Affected Products
The following products are affected by CVE-2026-7837
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | LOW | 33c584b5-0579-4c06-b2a0-8d8329fcab9c |
Solution
- Update Netatalk to a patched version.
- Apply vendor security patches.
- Review file operation security.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-7837.
| URL | Resource |
|---|---|
| https://netatalk.io/security/CVE-2026-7837 |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-7837 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-7837
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-7837 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-7837 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by 33c584b5-0579-4c06-b2a0-8d8329fcab9c
May. 21, 2026
Action Type Old Value New Value Added Description A time-of-check time-of-use (TOCTOU) condition in the ad_flush function in Netatalk 3.0.0 through 4.4.2 involves root-privileged file operations, which may allow a remote attacker to cause limited data modification under specific race conditions. Added CVSS V3.1 AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N Added CWE CWE-367 Added Reference https://netatalk.io/security/CVE-2026-7837