CVE-2026-33281: Ella Core is a 5G core designed for private networks

Q: How do I fix CVE-2026-33281?

ella core: upgrade to 1.6.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-33281 being exploited?

CVE-2026-33281 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-2026-33281 affect?

CVE-2026-33281 affects ella core. Severity is medium (CVSS 6.5). Ella Core is a 5G core designed for private networks. Versions prior to 1.6.0 panic when processing NGAP messages with invalid PDU Session IDs outside of 1-15. An attacker able to send crafted NGAP messages to Ella Core can crash the proces

Q: How urgent is CVE-2026-33281?

Priority 31/100. No elevated risk signals yet.

Routine

MEDIUM 6.5UPGRADE

CVE-2026-33281 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 1.6.0 panic when processing NGAP messages with invalid PDU Session IDs outside of 1-15. An attacker able to send crafted NGAP messages to Ella Core can crash the process, causing service disruption for all connected subscribers. No authentication is required. Version 1.6.0 added PDU Session ID validations during NGAP message handling.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.4% (top 65%)
CISA exploited list	No
Weakness	CWE-129
Published	2026-03-24
Last modified	2026-06-17

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

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-24 00:16 UTCPublished CVE record published
2026-06-17 10:37 UTCUpdated Record last modified

ellanetworks ella core UPGRADE

Affected: < 1.6.0

Fixed in: 1.6.0

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 1.6.0 (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-2026-33281?

ella core: upgrade to 1.6.0. Exact commands for each OS are on this page.

Is CVE-2026-33281 being exploited?

CVE-2026-33281 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-2026-33281 affect?

CVE-2026-33281 affects ella core. Severity is medium (CVSS 6.5). Ella Core is a 5G core designed for private networks. Versions prior to 1.6.0 panic when processing NGAP messages with invalid PDU Session IDs outside of 1-15. An attacker able to send crafted NGAP messages to Ella Core can crash the proces

How urgent is CVE-2026-33281?

Priority 31/100. 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
CVE-2026-33903 MEDIUM 6.5 UPGRADE Ella Core is a 5G core designed for private networks
CVE-2026-34761 MEDIUM 5.8 UPGRADE Ella Core is a 5G core designed for private networks

References

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