CVE-2026-7779 — Open5GS Denial of Service
CVE-2026-7779 — A security flaw has been discovered in Open5GS up to 2.7.7. Affected is the function udm_nudr_dr_handle_subscription_authentication of the file /src/udm/nudr-handler.c of the component authentication-subscription Endpoint. Performing a manipulation results in denial of service. Remot
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-2026-7779 updates and patches.
Related ATT&CK Techniques
🛡️ Detection Rules
2 rules · 6 SIEM formats2 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.
CVE-2026-7779 - Open5GS UDM Nudr Subscription Authentication DoS
title: CVE-2026-7779 - Open5GS UDM Nudr Subscription Authentication DoS
id: scw-2026-05-04-ai-1
status: experimental
level: high
description: |
Detects attempts to exploit CVE-2026-7779 by targeting the UDM Nudr subscription authentication endpoint with a specific URI path and potentially malformed data, leading to a denial of service.
author: SCW Feed Engine (AI-generated)
date: 2026-05-04
references:
- https://shimiscyberworld.com/posts/nvd-CVE-2026-7779/
tags:
- attack.initial_access
- attack.t1190
logsource:
category: webserver
detection:
selection:
cs-uri|contains:
- '/udm/nudr/dr/subscription/authentication'
cs-method|exact:
- 'POST'
cs-uri-query|contains:
- 'invalid_auth_data_pattern'
condition: selection
falsepositives:
- Legitimate administrative activity
Source: Shimi's Cyber World · License & reuse
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-7779 | vulnerability | CVE-2026-7779 |
| CWE-404 | weakness | CWE-404 |
Written by SCW Vulnerability Desk
Source & Attribution
| Source Platform | NVD |
| Channel | National Vulnerability Database |
| Published | May 05, 2026 at 00:16 UTC |
This content was curated and summarized by Shimi's Cyber World for informational purposes. It is not copied or republished in full. All intellectual property rights remain with the original author and source.
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