CVE-2026-15720
Pre-auth heap out-of-bounds read in the AMF NAS 5GS mobile-identity handler
Description
In Open5GS through version 2.7.7 a pre-authentication heap out-of-bounds read in the AMF NAS 5GS mobile-identity handler may result in subscriber-wide denial of service.
INFO
Published Date :
July 14, 2026, 7:16 p.m.
Last Modified :
July 14, 2026, 7:16 p.m.
Remotely Exploit :
Yes !
Source :
74b3a70d-cca6-4d34-9789-e83b222ae3be
Affected Products
The following products are affected by CVE-2026-15720
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 | HIGH | 74b3a70d-cca6-4d34-9789-e83b222ae3be |
Solution
- Update Open5GS to a version later than 2.7.7.
- Verify the AMF NAS 5GS mobile-identity handler.
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-2026-15720.
| URL | Resource |
|---|---|
| https://github.com/open5gs/open5gs/security/advisories/GHSA-f4mx-3x6p-cfwp |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-15720 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-2026-15720
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-2026-15720 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-15720 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 74b3a70d-cca6-4d34-9789-e83b222ae3be
Jul. 14, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'open5gs', 'product': 'open5gs', 'versions': [{'status': 'affected', 'version': '0', 'versionType': 'semver', 'lessThanOrEqual': '2.7.7'}], 'defaultStatus': 'unaffected'}] Added Description In Open5GS through version 2.7.7 a pre-authentication heap out-of-bounds read in the AMF NAS 5GS mobile-identity handler may result in subscriber-wide denial of service. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H Added CWE CWE-125 Added Reference https://github.com/open5gs/open5gs/security/advisories/GHSA-f4mx-3x6p-cfwp