CVE-2023-26496Network attack vector

Unauthenticated baseband code execution via unchecked SDP length

Published Mar 23, 2023 · Updated Feb 25, 2025

Memory corruption in Samsung Exynos baseband modems allows remote attackers to execute code via a crafted SDP fmtp attribute. The SDP parser uses an unchecked fmtp parameter length while writing the attribute into modem memory, causing an out-of-bounds write. Exploitation requires only the victim's phone number and no user interaction, allowing silent compromise at the baseband level.

CVSS severity8.6
High
EPSS probability22.57%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory corruption in Samsung Exynos baseband modems allows remote attackers to execute code via a crafted SDP fmtp attribute. The SDP parser uses an unchecked fmtp parameter length while writing the attribute into modem memory, causing an out-of-bounds write. Exploitation requires only the victim's phone number and no user interaction, allowing silent compromise at the baseband level.

The record

CVE
CVE-2023-26496
Published
Mar 23, 2023
Updated
Feb 25, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 23, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 25, 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 privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.6MITRECVSS:3.1/AV:N/AC:L/PR:N/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.

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
T1203Exploitation for Client Execution

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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