HOMEVULNERABILITIESCVE-2026-33064
HIGH

CVE-2026-33064

CWE-478Published: March 20, 2026· Updated: Mar 23, 2026

7.5
CVSS v3.1
EPSS:0.20%probability of exploitation in 30 daysPercentile:42.1th

Official Description

Free5GC is an open-source Linux Foundation project for 5th generation (5G) mobile core networks. Versions prior to 1.4.2 are vulnerable to procedure panic caused by Nil Pointer Dereference in the /sdm-subscriptions endpoint. A remote attacker can cause the UDM service to panic and crash by sending a crafted POST request to the /sdm-subscriptions endpoint with a malformed URL path containing path traversal sequences (../) and a large JSON payload. The DataChangeNotificationProcedure function in notifier.go attempts to access a nil pointer without proper validation, causing a complete service crash with "runtime error: invalid memory address or nil pointer dereference". Exploitation would result in UDM functionality disruption until recovery by restart. This issue has been fixed in version 1.4.2.

NVD Source

Technical Analysis

CVE-2026-33064 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.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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
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Official Patches & Advisories

PATCHhttps://github.com/free5gc/free5gc/issues/781
PATCHhttps://github.com/free5gc/free5gc/security/advisories/GHSA-7g27-v5wj-jr75
PATCHhttps://github.com/free5gc/udm/commit/65d7070f4bfd016864cbbaefbd506bbc85d2fa92
PATCHhttps://github.com/free5gc/udm/pull/78

All References (4)

→
https://github.com/free5gc/free5gc/issues/781Exploit · Issue Tracking · Patch · Vendor Advisory
→
https://github.com/free5gc/free5gc/security/advisories/GHSA-7g27-v5wj-jr75Patch · Vendor Advisory
→
https://github.com/free5gc/udm/commit/65d7070f4bfd016864cbbaefbd506bbc85d2fa92Patch
→
https://github.com/free5gc/udm/pull/78Issue Tracking · Patch

Quick Facts

CVE IDCVE-2026-33064
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-478
CISA KEVNo
EPSS (30d)0.20%
Affected1 vendor
PublishedMar 20, 2026

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-33064 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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