CVE-2026-5661: Denial of Service in Free5GC
CVE-2026-5661 is a medium severity vulnerability in Free5GC version 4. 2. 0 affecting the NGSetupRequest Handler component. It allows a remote attacker to cause a denial of service condition. The vulnerability can be exploited without authentication or user interaction. Although an exploit is publicly available, there are no confirmed reports of exploitation in the wild. No official patch or remediation guidance has been provided yet.
AI Analysis
Technical Summary
This vulnerability in Free5GC 4.2.0 involves the NGSetupRequest Handler component, where crafted input can lead to denial of service. The attack vector is network-based with no privileges or user interaction required. The CVSS 4.0 base score is 6.9, indicating a medium severity impact primarily due to service disruption. The vulnerability is publicly known and exploitable remotely, but no vendor advisory or patch information is currently available.
Potential Impact
Successful exploitation results in denial of service, potentially disrupting the affected Free5GC 4.2.0 network function. This can impact availability of the 5G core network component handling NGSetupRequest messages. There is no indication of data confidentiality or integrity compromise. No known active exploitation has been reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, consider limiting exposure of the vulnerable component to untrusted networks and monitor for unusual NGSetupRequest traffic patterns. Avoid deploying Free5GC 4.2.0 in production environments where possible until patched.
CVE-2026-5661: Denial of Service in Free5GC
Description
CVE-2026-5661 is a medium severity vulnerability in Free5GC version 4. 2. 0 affecting the NGSetupRequest Handler component. It allows a remote attacker to cause a denial of service condition. The vulnerability can be exploited without authentication or user interaction. Although an exploit is publicly available, there are no confirmed reports of exploitation in the wild. No official patch or remediation guidance has been provided yet.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in Free5GC 4.2.0 involves the NGSetupRequest Handler component, where crafted input can lead to denial of service. The attack vector is network-based with no privileges or user interaction required. The CVSS 4.0 base score is 6.9, indicating a medium severity impact primarily due to service disruption. The vulnerability is publicly known and exploitable remotely, but no vendor advisory or patch information is currently available.
Potential Impact
Successful exploitation results in denial of service, potentially disrupting the affected Free5GC 4.2.0 network function. This can impact availability of the 5G core network component handling NGSetupRequest messages. There is no indication of data confidentiality or integrity compromise. No known active exploitation has been reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, consider limiting exposure of the vulnerable component to untrusted networks and monitor for unusual NGSetupRequest traffic patterns. Avoid deploying Free5GC 4.2.0 in production environments where possible until patched.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-04-06T07:48:14.498Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69d3c3860a160ebd92bdb615
Added to database: 4/6/2026, 2:30:30 PM
Last enriched: 4/13/2026, 3:17:20 PM
Last updated: 5/21/2026, 6:34:56 PM
Views: 55
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