CVE-2026-33281Network attack vector

Service crash via unchecked PDU Session IDs

Published Mar 23, 2026 · Updated Mar 23, 2026

Improper array-index validation in Ella Core before 1.6.0 allows remote attackers to crash the mobile core with crafted NGAP messages. NGAP message handling accepts PDU Session IDs outside the valid 1–15 range and uses them without bounds validation, causing a panic. No authentication is required, and one malformed message interrupts service for all connected subscribers.

CVSS severity6.5
Medium
EPSS probability0.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper array-index validation in Ella Core before 1.6.0 allows remote attackers to crash the mobile core with crafted NGAP messages. NGAP message handling accepts PDU Session IDs outside the valid 1–15 range and uses them without bounds validation, causing a panic. No authentication is required, and one malformed message interrupts service for all connected subscribers.

The record

CVE
CVE-2026-33281
Published
Mar 23, 2026
Updated
Mar 23, 2026
Vendor
Ella Networks
Product
Ella Core
Classifications
CWE-129, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 23, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 23, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.6.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Ella Networks · Ella Coreversion=< 1.6.0

Published CVSS scores

6.5GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-129Improper Validation of Array Index
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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