CVE-2023-21467

Unspecified impact via incorrect message authentication

Published Sep 3, 2025 · Updated Sep 3, 2025

Authentication error in Exynos baseband before SMR Apr-2023 Release 1 allows attackers to trigger unspecified impact via unencrypted 3GPP messages. The baseband's 3GPP implementation processes an unencrypted message without the authentication logic added by the patch. Exploitation requires an adjacent network position and prior low-privileged access; Samsung has not disclosed whether the result is data access, modification, or service interruption.

CVSS severity9.8
Critical
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication error in Exynos baseband before SMR Apr-2023 Release 1 allows attackers to trigger unspecified impact via unencrypted 3GPP messages. The baseband's 3GPP implementation processes an unencrypted message without the authentication logic added by the patch. Exploitation requires an adjacent network position and prior low-privileged access; Samsung has not disclosed whether the result is data access, modification, or service interruption.

The record

CVE
CVE-2023-21467
Published
Sep 3, 2025
Updated
Sep 3, 2025
Vendor
Samsung Electronics Co., Ltd.
Product
Samsung Mobile Devices
Classifications
CWE-287
Attack vector
adjacent
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 3, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 3, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesauthenticated

What is affected?

Samsung Electronics Co., Ltd. · Samsung Mobile DevicesAffected versions are unavailable in this record.

Published CVSS scores

4.6Samsung MobileCVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

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

Weakness, pattern, technique

CWE-287Improper Authentication

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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