How severe is CVE-2026-33903?

CVE-2026-33903 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-33903 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-33903?

CVE-2026-33903 affects Ellanetworks Ella Core. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-33903?

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

Does CVE-2026-33903 have an EU (EUVD) identifier?

Yes. CVE-2026-33903 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-16839.

When was CVE-2026-33903 published?

CVE-2026-33903 was published on 2026-03-27 and last updated on 2026-06-17.

CVE-2026-33903

CVE-2026-33903 is a medium-severity vulnerability in Ellanetworks Ella Core with a CVSS 3.x base score of 6.5. 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-476.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (11th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-16839
Weakness: CWE-476
Affected product: Ellanetworks Ella Core
Published: 2026-03-27
Last modified: 2026-06-17

Description

Ella Core is a 5G core designed for private networks. Versions prior to 1.7.0 panic when processing a specially crafted NGAP LocationReport message. An attacker able to send crafted NGAP messages to Ella Core can crash the process, causing service disruption for all connected subscribers. Version 1.7.0 adds guards in NGAP Location Report handler.

Frequently asked questions

What is CVE-2026-33903?: Ella Core is a 5G core designed for private networks. Versions prior to 1.7.0 panic when processing a specially crafted NGAP LocationReport message. An attacker able to send crafted NGAP messages to Ella Core can crash the process, causing service disruption for all connected subscribers. Version 1.7.0 adds guards in NGAP Location Report handler.
How severe is CVE-2026-33903?: CVE-2026-33903 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-33903 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-33903?: CVE-2026-33903 affects Ellanetworks Ella Core. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-33903?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-33903 have an EU (EUVD) identifier?: Yes. CVE-2026-33903 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-16839.
When was CVE-2026-33903 published?: CVE-2026-33903 was published on 2026-03-27 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:ellanetworks:ella_core:*:*:*:*:*:*:*:*

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