CVE-2026-33970

Baseband crash via malformed RRC reconfiguration

Published Sep 14, 2026 · Updated Sep 14, 2026

NULL pointer dereference in Samsung Exynos 850 firmware allows attackers to crash the device's 5G baseband via a malformed message. The NR RRC and L2 components dereference a null pointer while processing a malformed RRC Reconfiguration message. Delivery of that control-plane message to an affected device is required, and Samsung discloses no deeper code locus or impact beyond baseband service interruption.

CVSS severityUnavailable
Unscored
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

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Summary

What happened

NULL pointer dereference in Samsung Exynos 850 firmware allows attackers to crash the device's 5G baseband via a malformed message. The NR RRC and L2 components dereference a null pointer while processing a malformed RRC Reconfiguration message. Delivery of that control-plane message to an affected device is required, and Samsung discloses no deeper code locus or impact beyond baseband service interruption.

The record

CVE
CVE-2026-33970
Published
Sep 14, 2026
Updated
Sep 14, 2026
Vendor
Samsung Electronics
Product
Samsung Exynos 850 Firmware
Classifications
CWE-476, T1499
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 14, 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=0 <=2025-12-24

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

Samsung Electronics · Samsung Exynos 850 Firmwareversion=0 <=2025-12-24

Published CVSS scores

No CVSS assessment is available in this record.

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)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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