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VulnerabilityAwaiting classification

CVE-2026-21040

MEDIUM · 6.9 CVSS v4.0 Published 2026-07-10
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
71/100
Remediation priority · Elevated
Zero-click 6 weeks old

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
Improper access control in IAFDService prior to SMR Jul-2026 Release 1 allows local privileged attackers to use the privileged APIs.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · moderate confidence

Improper access control in IAFDService allows local privileged attackers to bypass intended authorization checks and access privileged APIs. This is an authorization bypass vulnerability where the service fails to properly validate that the calling user has appropriate permissions before executing privileged operations.

MitigationApply the SMR July-2026 Release 1 patch or later to IAFDService to remediate the improper access control vulnerability.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Local
Complexity
Low
Privileges
Low
Authentication
X
User interaction
None
Scope
X

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/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

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify if IAFDService is installed
    Check for IAFDService process or service using task manager, service manager (services.msc), or command 'sc query IAFDService' on Windows or 'systemctl list-units | grep IAFD' on Linux
    Affected if IAFDService is present and running on the system
  2. Determine IAFDService version
    Check the service binary version: on Windows, right-click the IAFDService executable and view Properties > Details, or use 'wmic service where "name like 'IAFDService'" get /value' and check version info; on Linux, use 'rpm -q iafd-service' or check the service binary with 'ls -la' and review version file if present
    Affected if Unable to determine version or version is prior to the July-2026 Release 1 patch
  3. Verify service permissions configuration
    Review service configuration permissions: on Windows, run 'sc qc IAFDService' to check service configuration; on Linux, check /etc/systemd/system/IAFDService.service or equivalent for user/group settings; verify the service runs with minimal required privileges
    Affected if Service runs with elevated privileges and allows untrusted local users to interact with it
  4. Check for exposed API endpoints
    Review IAFDService configuration files in the installation directory for any API endpoint definitions or ACL settings; check if network binding is enabled (look for listen addresses in config files)
    Affected if Service exposes network listeners without proper authentication or allows local pipe/socket access without permission validation
  5. Audit local user access to service
    Check which local users or groups have permission to send requests to IAFDService: review service ACLs using 'icacls' on Windows service binary or file permissions on Linux; verify only intended administrator accounts have access
    Affected if Unprivileged local users have permissions to communicate with the service or invoke its methods

The environment is affected if IAFDService is running and either the version predates the July-2026 Release 1 patch or unprivileged local users can access the service's privileged APIs.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Apply the SMR July-2026 Release 1 patch or later to IAFDService to remediate the improper access control vulnerability.

Recommended fix High confidence

SMR Jul-2026 Release 1

  1. Navigate to Settings > Security and privacy > Security update on the Samsung device
  2. Check the current Android security patch level
  3. Locate and install the SMR Jul-2026 Release 1 security update (also labeled as the July 2026 security patch)
  4. Reboot the device after the update completes
  5. Verify the security patch level reflects the July 2026 update in Settings > Security and privacy > Security update

Generated from the published advisory — verify against the referenced sources before acting.

Have this fixed Scoped from the published advisory
  • Consultation3.0 h
  • Implementation12.0 h
  • Testing6.0 h
  • Review / QA3.0 h
24.0 hours of engineering $4,200
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Scan for this in your stack

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-21040 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data