CVE-2023-50807Network attack vector

Memory corruption via unauthenticated 2G heap write

Published Jul 9, 2024 · Updated Aug 2, 2024

Heap out-of-bounds write in Samsung Exynos 9110, Modem 5123, and Modem 5300 allows remote attackers to corrupt memory over 2G. The undisclosed 2G processing path writes beyond a heap buffer while handling unauthenticated cellular input. Reachability requires 2G connectivity; the public record does not identify whether the corruption causes a crash, code execution, or another concrete outcome.

CVSS severity8.1
High
EPSS probability0.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap out-of-bounds write in Samsung Exynos 9110, Modem 5123, and Modem 5300 allows remote attackers to corrupt memory over 2G. The undisclosed 2G processing path writes beyond a heap buffer while handling unauthenticated cellular input. Reachability requires 2G connectivity; the public record does not identify whether the corruption causes a crash, code execution, or another concrete outcome.

The record

CVE
CVE-2023-50807
Published
Jul 9, 2024
Updated
Aug 2, 2024
Vendor
Samsung Electronics Co., Ltd.
Product
Exynos Modem 5123
Classifications
CWE-787
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 9, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record 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 <*

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Samsung Electronics Co., Ltd. · Exynos Modem 5123version=0 <*
Samsung Electronics Co., Ltd. · Exynos 9110 Firmwareversion=0 <*
Samsung Electronics Co., Ltd. · Exynos Modem 5300version=0 <*

Published CVSS scores

8.1MITRECVSS:3.1/AV:N/AC:H/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write

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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