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CVE-2026-21087

7.8, high

Samsung Mobile Devices Out-of-Bounds Write Vulnerability

NVD (opens in a new tab) CVE.org (opens in a new tab)
CVSS
7.8, high high CVSS v3.1
EPSS, next 30 days
0.1% higher than 1.5% of scored CVEs
Exploitation
No public evidence
Published
9 Sept 2026a month ago

Description

Out-of-bounds write in libmdnie.so prior to SMR Sep-2026 Release 1 allows local attackers to execute arbitrary code with system server privilege.

Details

Vendor
Samsung Mobile
Product
Samsung Mobile Devices
Weakness
CWE-787 (opens in a new tab)
Status
Analyzed
Updated
11 Sept 2026
Assigner
mobile.security@samsung.com

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References 1

Advisories 1

The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.

Other Samsung Mobile CVEs

Every Samsung Mobile CVE we hold

Same vendor in what we hold, not a known link between the flaws.

  • CVE-2026-21095 Samsung Mobile Devices Heap-based Buffer Overflow Vulnerability EPSS 0.5% 9.8, critical
  • CVE-2026-21096 Samsung Mobile Devices Heap-based Buffer Overflow Vulnerability EPSS 0.5% 9.8, critical
  • CVE-2026-21086 Samsung Mobile Devices Improper Input Validation Vulnerability EPSS 0.1% 7.8, high
  • CVE-2026-21088 Samsung Mobile Devices Improper Input Validation Vulnerability EPSS 0.1% 7.8, high
  • CVE-2026-21089 Samsung Mobile Devices Improper Input Validation Vulnerability EPSS 0.1% 7.8, high
  • CVE-2026-21090 Samsung Mobile Devices Out-of-Bounds Write Vulnerability EPSS 0.1% 7.8, high
  • CVE-2026-21091 Samsung Mobile Devices Out-of-Bounds Write Vulnerability EPSS 0.1% 7.8, high
  • CVE-2026-21094 Samsung Mobile Devices Improper Input Validation Vulnerability EPSS 0.2% 8.8, high

Beyond this page

Is CVE-2026-21087 in your network?

This page tells you how dangerous CVE-2026-21087 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.

  • EXYS7600 OCELOT

    Find it before attackers do

    Ocelot scans your network on a schedule and reports every vulnerability it finds by its CVE identifier, with its CVSS score and how many of your hosts are affected. A finding like CVE-2026-21087 comes with the devices to patch.

    Learn more about EXYS7600 OCELOT

  • EXYS7950 KONDRA

    Detect it if it's exploited

    Until the patch is applied, Kondra monitors your network, events and endpoints in real time. It keeps an inventory of the software installed on every endpoint, and its anomaly detection rules flag what an attacker does once inside.

    Learn more about EXYS7950 KONDRA
Check your exposure

Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 17 Oct 2026, not the live upstream state.