How to fix or mitigate CVE-2026-21048?

24 hours: Inventory Samsung Android devices in corporate use; identify current security patch levels; implement email content filtering to block DNG and raw image file formats from external senders. 7 days: Restrict image codec processing in non-critical workflows where operationally feasible; communicate to users to avoid opening image files from untrusted sources. 30 days: Deploy Samsung Mobile Release Jul-2026 Release 1 or later immediately upon availability; verify patch deployment across full Samsung device fleet.

CVE-2026-21048

Q: What is the CVSS score of CVE-2026-21048?

CVE-2026-21048 has a CVSS 4.0 base score of 8.3 (High). CVSS vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X. EPSS exploitation probability: 0.4%.

EUVD-2026-42818 HIGH

2026-07-10 mobile.security@samsung.com

GHSA-qvx4-w85v-qhh8

Buffer Overflow

8.3

CVSS 4.0 · Vendor: samsung

Severity by source

Vendor (samsung) PRIMARY

8.3 HIGH

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Primary rating from Vendor (samsung) · only source for this CVE.

CVSS VectorVendor: samsung

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Lifecycle Timeline

Analysis Generated

Jul 10, 2026 - 05:45 vuln.today

DescriptionCVE.org

Out-of-bounds write in parsing DNG format in libimagecodec.media.quram.so prior to SMR Jul-2026 Release 1 allows remote attackers to write out-of-bounds memory.

AnalysisAI

Out-of-bounds write in Samsung's Quram image codec library (libimagecodec.media.quram.so) on Samsung Android devices lets remote attackers corrupt memory outside allocated bounds by delivering a malformed DNG (Adobe Digital Negative) raw image, prior to the SMR Jul-2026 Release 1 patch level. The flaw carries CVSS 4.0 8.3 (High) with a network attack vector, no privileges and no user interaction, but a present attack requirement (AT:P). No public exploit identified at time of analysis and it is not listed in CISA KEV.