CVE-2026-21096Network attack vector

Remote code execution via JPEG heap overflow

Published Sep 9, 2026 · Updated Sep 11, 2026

Heap-based buffer overflow in Samsung Mobile Devices on Android 14 through 17 allows remote attackers to execute code via crafted JPEG data. The libimagecodec.quram.so JPEG decoder writes beyond a heap buffer while mishandling untrusted image input; Samsung has not disclosed the faulty routine or boundary calculation. Network delivery requires no authentication or user interaction, and successful exploitation executes arbitrary code on the device.

CVSS severity9.2
Critical
EPSS probability0.46%
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 Mobile Devices on Android 14 through 17 allows remote attackers to execute code via crafted JPEG data. The libimagecodec.quram.so JPEG decoder writes beyond a heap buffer while mishandling untrusted image input; Samsung has not disclosed the faulty routine or boundary calculation. Network delivery requires no authentication or user interaction, and successful exploitation executes arbitrary code on the device.

The record

CVE
CVE-2026-21096
Published
Sep 9, 2026
Updated
Sep 11, 2026
Vendor
Samsung Electronics Co., Ltd.
Product
Samsung Mobile Devices
Classifications
CWE-122, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 11, 2026Record 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 vectornetwork
Required privilegesunauthenticated

What is affected?

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

Published CVSS scores

9.2Samsung MobileCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow
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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