CVE-2026-5661 | Free5GC 4.2.0 NGSetupRequest denial of service (Issue 832)

VDB-355485 · CVE-2026-5661 · ISSUE 832 FREE5GC 4.2.0 NGSETUPREQUEST DENIAL OF SERVICE HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 4.8 $0-$5k 0.65+ Summaryinfo A vulnerability marked as problematic has been reported in Free5GC 4.2.0. This impacts an unknown function of the component NGSetupRequest Handler. Performing a manipulation results in denial of service. This vulnerability is known as CVE-2026-5661. Remote exploitation of the attack is possible. Furthermore, an exploit is available. Detailsinfo A vulnerability, which was classified as problematic, was found in Free5GC 4.2.0. This affects an unknown code of the component NGSetupRequest Handler. The manipulation with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on availability. The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-5661. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are unknown but a public exploit is available. MITRE ATT&CK project uses the attack technique T1499 for this issue. The exploit is shared for download at github.com. It is declared as proof-of-concept. There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product. Productinfo Name Free5GC Version 4.2.0 Website Product: https://github.com/free5gc/free5gc/ CPE 2.3info 🔒 CPE 2.2info 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 5.3 VulDB Meta Temp Score: 4.8 VulDB Base Score: 5.3 VulDB Temp Score: 4.8 VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Denial of service CWE: CWE-404 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Access: Public Status: Proof-of-Concept Download: 🔒 Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: no mitigation known Status: 🔍 0-Day Time: 🔒 Timelineinfo 04/06/2026 Advisory disclosed 04/06/2026 +0 days VulDB entry created 04/06/2026 +0 days VulDB entry last update Sourcesinfo Product: github.com Advisory: 832 Status: Not defined Confirmation: 🔒 CVE: CVE-2026-5661 (🔒) GCVE (CVE): GCVE-0-2026-5661 GCVE (VulDB): GCVE-100-355485 scip Labs: https://www.scip.ch/en/?labs.20161013 Entryinfo Created: 04/06/2026 09:53 Changes: 04/06/2026 09:53 (55) Complete: 🔍 Submitter: shovon0203 Cache ID: 99:E3F:101 Submitinfo Accepted Submit #785896: Linux Foundation free5GC 4.2.0 State Synchronization Error (by shovon0203) Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸