CVE-2023-26073Public exploitNetwork attack vector

Baseband memory corruption via emergency-number list decoding

Published Mar 13, 2023 · Updated Mar 3, 2025

Heap-based buffer overflow in Samsung Exynos chipsets allows attackers to corrupt baseband memory via a malformed 5G MM message. The NrmmMsgCodec decoder fails to validate extended emergency number list parameters before writing decoded data into a heap buffer. Exploitation requires either a malicious mobile network operator or local device access; Samsung does not specify whether the overflow causes a crash or code execution.

CVSS severity7.6
High
EPSS probability1.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap-based buffer overflow in Samsung Exynos chipsets allows attackers to corrupt baseband memory via a malformed 5G MM message. The NrmmMsgCodec decoder fails to validate extended emergency number list parameters before writing decoded data into a heap buffer. Exploitation requires either a malicious mobile network operator or local device access; Samsung does not specify whether the overflow causes a crash or code execution.

The record

CVE
CVE-2023-26073
Published
Mar 13, 2023
Updated
Mar 3, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 13, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 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 buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.6MITRECVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write

Public exploit references

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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