CVE-2023-26075Public exploitNetwork attack vector

Modem memory corruption via Service Area List decoding

Published Mar 10, 2023 · Updated Feb 27, 2025

Intra-object overflow in Samsung Exynos 5G MM firmware allows remote authenticated users to corrupt modem memory via a Service Area List. The NrmmMsgCodec decoder handles Service Area List information element 0x27 without sufficient parameter validation, allowing data to overrun fields within an existing object. Reaching the decoder requires a malicious mobile network operator or local device access; public sources do not state whether exploitation crashes the modem, changes data, or executes code.

CVSS severity9.8
Critical
EPSS probability0.95%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Intra-object overflow in Samsung Exynos 5G MM firmware allows remote authenticated users to corrupt modem memory via a Service Area List. The NrmmMsgCodec decoder handles Service Area List information element 0x27 without sufficient parameter validation, allowing data to overrun fields within an existing object. Reaching the decoder requires a malicious mobile network operator or local device access; public sources do not state whether exploitation crashes the modem, changes data, or executes code.

The record

CVE
CVE-2023-26075
Published
Mar 10, 2023
Updated
Feb 27, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-120
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 10, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 27, 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

9.8NIST NVDCVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

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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