CVE-2026-7536 — The Function Bsf_sess_add_by_ip_address Of The File /Nbsf-Ma Denial of Service
CVE-2026-7536 — A vulnerability was determined in Open5GS up to 2.7.7. This vulnerability affects the function bsf_sess_add_by_ip_address of the file /nbsf-management/v1/pcfBindings of the component BSF. Executing a manipulation of the argument ipv4Addr can lead to denial of service. The attack can
What This Means For You
- If your environment is affected by CWE-404, review your exposure and prioritize patching based on your environment. Monitor vendor advisories for CVE-2026-7536 updates and patches.
Related ATT&CK Techniques
🛡️ Detection Rules
1 rule · 6 SIEM formats1 detection rule auto-generated for this incident, mapped to MITRE ATT&CK. Sigma YAML is free — export to any SIEM format via the Intel Bot.
CVE-2026-7536 - Open5GS BSF Denial of Service via IPv4 Address Manipulation
title: CVE-2026-7536 - Open5GS BSF Denial of Service via IPv4 Address Manipulation
id: scw-2026-05-01-ai-1
status: experimental
level: high
description: |
Detects attempts to exploit CVE-2026-7536 by targeting the /nbsf-management/v1/pcfBindings endpoint with a POST request containing the 'ipv4Addr' parameter, which can lead to a denial of service in Open5GS.
author: SCW Feed Engine (AI-generated)
date: 2026-05-01
references:
- https://shimiscyberworld.com/posts/nvd-CVE-2026-7536/
tags:
- attack.initial_access
- attack.t1190
logsource:
category: webserver
detection:
selection:
cs-uri|startswith:
- '/nbsf-management/v1/pcfBindings'
cs-method|exact:
- 'POST'
cs-uri-query|contains:
- 'ipv4Addr='
condition: selection
falsepositives:
- Legitimate administrative activity
Source: Shimi's Cyber World · License & reuse
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-7536 | vulnerability | CVE-2026-7536 |
| CWE-404 | weakness | CWE-404 |
Written by SCW Vulnerability Desk
Source & Attribution
| Source Platform | NVD |
| Channel | National Vulnerability Database |
| Published | May 01, 2026 at 05:16 UTC |
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