MEDIUM
CVE-2026-5661
CWE-404Published: April 6, 2026· Updated: Apr 7, 2026
5.3
CVSS v3.1
EPSS:0.06%probability of exploitation in 30 daysPercentile:17.9th
Official Description
A vulnerability was identified in Free5GC 4.2.0. This affects an unknown function of the component NGSetupRequest Handler. Such manipulation leads to denial of service. The attack may be launched remotely. The exploit is publicly available and might be used.
Technical Analysis
CVE-2026-5661 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityLow
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
All References (7)
Quick Facts
CVE IDCVE-2026-5661
CVSS Score5.3 / 10
SeverityMEDIUM
WeaknessCWE-404
CISA KEVNo
EPSS (30d)0.06%
PublishedApr 6, 2026
Related CVEs (CWE-404)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2026-5661 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.