CVE-2026-33903: Ella Core is a 5G core designed for private networks

Q: How do I fix CVE-2026-33903?

ella core: upgrade to 1.7.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-33903 being exploited?

CVE-2026-33903 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-33903 affect?

CVE-2026-33903 affects ella core. Severity is medium (CVSS 6.5). 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

Q: How urgent is CVE-2026-33903?

Priority 26/100. No elevated risk signals yet.

Routine

MEDIUM 6.5UPGRADE

CVE-2026-33903 is a medium-severity flaw (CVSS 6.5) affecting ella core. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Adjacent network
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.2% (top 88%)
CISA exploited list	No
Weakness	CWE-476
Published	2026-03-27
Last modified	2026-10-26

Publisher (CNA): GitHub, Inc. · Vendor: ellanetworks

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-27 21:17 UTCPublished CVE record published
2026-10-26 21:10 UTCUpdated Record last modified

ellanetworks ella core UPGRADE

Affected: < 1.7.0

Fixed in: 1.7.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy ella-core || rpm -q ella-core || ella-core --version

2. UPGRADE to 1.7.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade ella-core

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade ella-core

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-33903?

ella core: upgrade to 1.7.0. Exact commands for each OS are on this page.

Is CVE-2026-33903 being exploited?

CVE-2026-33903 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-33903 affect?

CVE-2026-33903 affects ella core. Severity is medium (CVSS 6.5). 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

How urgent is CVE-2026-33903?

Priority 26/100. No elevated risk signals yet.

Related CVEs

CVE-2026-33907 MEDIUM 6.5 UPGRADE Ella Core is a 5G core designed for private networks
CVE-2026-33904 MEDIUM 6.5 UPGRADE Ella Core is a 5G core designed for private networks
CVE-2026-33906 HIGH 7.2 UPGRADE Ella Core is a 5G core designed for private networks

References

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