CVE-2026-33064
Remote crash of Free5GC UDM via crafted POST to /sdm-subscriptions
Is CVE-2026-33064 being exploited?
Not confirmed. CVE-2026-33064 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.49% probability of exploitation in the next 30 days.
How severe is CVE-2026-33064?
CVE-2026-33064 is rated High with a CVSS score of 8.7. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-33064?
Yes. A fix has been recorded for CVE-2026-33064. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-33064 affect?
CVE-2026-33064 affects Free5GC UDM service (versions < 1.4.2). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-33064?
Upgrade to 1.4.2+; apply patch; restart UDM after upgrade
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote DoS via nil-pointer dereference; UDM service crashes and core functionality unavailable until restart
Patch when possible
- affected< 1.4.2
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.