HOMEVULNERABILITIESCVE-2026-33192
MEDIUM

CVE-2026-33192

CWE-209Published: March 20, 2026· Updated: Mar 23, 2026

5.3
CVSS v3.1
EPSS:0.01%probability of exploitation in 30 daysPercentile:2.0th

Official Description

Free5GC is an open-source Linux Foundation project for 5th generation (5G) mobile core networks. In versions prior to 1.4.2, the UDM incorrectly converts a downstream 400 Bad Request (from UDR) into a 500 Internal Server Error when handling PATCH requests with an empty supi path parameter. Additionally, the UDM incorrectly translates the PATCH method to PUT when forwarding to UDR, indicating a deeper architectural issue. This leaks internal error handling behavior, making it difficult for clients to distinguish between client-side errors and server-side failures. The issue has been patched in version 1.4.2.

NVD Source

Technical Analysis

CVE-2026-33192 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
ConfidentialityLow
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Affected Vendors & Products

free5gc1 product
udm
Source: NVD CPE · 1 total CPE entries

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.

Official Patches & Advisories

PATCHhttps://github.com/free5gc/free5gc/issues/784
PATCHhttps://github.com/free5gc/free5gc/security/advisories/GHSA-5rvc-5cwx-g5x8
PATCHhttps://github.com/free5gc/udm/pull/79

All References (3)

→
https://github.com/free5gc/free5gc/issues/784Exploit · Issue Tracking · Patch · Vendor Advisory
→
https://github.com/free5gc/free5gc/security/advisories/GHSA-5rvc-5cwx-g5x8Patch · Vendor Advisory
→
https://github.com/free5gc/udm/pull/79Issue Tracking · Patch

Quick Facts

CVE IDCVE-2026-33192
CVSS Score5.3 / 10
SeverityMEDIUM
WeaknessCWE-209
CISA KEVNo
EPSS (30d)0.01%
Affected1 vendor
PublishedMar 20, 2026

Related CVEs (CWE-209)

CVE-2026-34045
8.2
CVE-2025-71282
7.5
CVE-2026-43873
7.5
CVE-2026-42552
7.5
CVE-2025-13726
7.5
CVE-2026-45728
7.5

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-33192 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.
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