How severe is CVE-2026-33192?

CVE-2026-33192 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2026-33192 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-33192?

CVE-2026-33192 affects Free5gc Udm. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-33192?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-33192 have an EU (EUVD) identifier?

Yes. CVE-2026-33192 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-13634.

When was CVE-2026-33192 published?

CVE-2026-33192 was published on 2026-03-20 and last updated on 2026-06-17.

CVE-2026-33192

CVE-2026-33192 is a medium-severity vulnerability in Free5gc Udm with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-209.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v4: 8.7
EPSS exploit prediction: 0% (24th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-13634
Weakness: CWE-209
Affected product: Free5gc Udm
Published: 2026-03-20
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-33192?: 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.
How severe is CVE-2026-33192?: CVE-2026-33192 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2026-33192 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-33192?: CVE-2026-33192 affects Free5gc Udm. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-33192?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-33192 have an EU (EUVD) identifier?: Yes. CVE-2026-33192 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-13634.
When was CVE-2026-33192 published?: CVE-2026-33192 was published on 2026-03-20 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:free5gc:udm:*:*:*:*:*:go:*:*

More vulnerabilities in Free5gc Udm

CVE-2026-33191 — High (CVSS 8.6): Free5GC is an open-source Linux Foundation project for 5th generation (5G) mobile core networks. Versions prior to…
CVE-2026-33064 — High (CVSS 7.5): Free5GC is an open-source Linux Foundation project for 5th generation (5G) mobile core networks. Versions prior to…
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