Samsung Devices up to SMR Mar-2021 Release 1 CmcCore insufficient privileges

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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8.4$0-$5k1.72-

Summaryinfo

A vulnerability identified as very critical has been detected in Samsung Devices. Impacted is an unknown function of the component CmcCore. Performing a manipulation results in insufficient privileges. This vulnerability is reported as CVE-2026-21121. The attack requires a local approach. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as very critical has been found in Samsung Devices. This affects some unknown functionality of the component CmcCore. The manipulation with an unknown input leads to a insufficient privileges vulnerability. CWE is classifying the issue as CWE-280. The product does not handle or incorrectly handles when it has insufficient privileges to access resources or functionality as specified by their permissions. This may cause it to follow unexpected code paths that may leave the product in an invalid state. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Improper handling of insufficient permission in CmcCore prior to SMR Oct-2026 Release 1 allows local attackers to use the privileged APIs.

The advisory is shared at security.samsungmobile.com. This vulnerability is uniquely identified as CVE-2026-21121 since 12/11/2025. The exploitability is told to be easy. An attack has to be approached locally. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/12/2026). MITRE ATT&CK project uses the attack technique T1222 for this issue.

Upgrading to version SMR Oct-2026 Release eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 8.8
VulDB Meta Temp Score: 8.4

VulDB Base Score: 8.8
VulDB Temp Score: 8.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Insufficient privileges
CWE: CWE-280 / CWE-266
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Devices SMR Oct-2026 Release

Timelineinfo

12/11/2025 CVE reserved
10/12/2026 +304 days Advisory disclosed
10/12/2026 +0 days VulDB entry created
10/12/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: samsung.com

Advisory: security.samsungmobile.com
Status: Confirmed

CVE: CVE-2026-21121 (🔒)
GCVE (CVE): GCVE-0-2026-21121
GCVE (VulDB): GCVE-100-416817

Entryinfo

Created: 10/12/2026 07:29
Changes: 10/12/2026 07:29 (66)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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