CVE-2021-30493Public exploit

Denial of service via writable registry log path

Published Apr 14, 2021 · Updated Aug 3, 2024

Incorrect permissions in the ChromaBroadcast registry key in Razer Synapse 3 3.5.1030.101917 allow local users to cause denial of service. RzSDKService.exe trusts a user-writable InstallPath value, appends its fixed runtime-log filename, and creates the resulting path with system privileges. Low-privileged Windows access and a service restart or reboot are required; the demonstrated consequence is system instability through constrained arbitrary file creation.

CVSS severity5.5
Medium
EPSS probability0.52%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect permissions in the ChromaBroadcast registry key in Razer Synapse 3 3.5.1030.101917 allow local users to cause denial of service. RzSDKService.exe trusts a user-writable InstallPath value, appends its fixed runtime-log filename, and creates the resulting path with system privileges. Low-privileged Windows access and a service restart or reboot are required; the demonstrated consequence is system instability through constrained arbitrary file creation.

The record

CVE
CVE-2021-30493
Published
Apr 14, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-276, T1112, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 14, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record 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 buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
4.9NIST NVDAV:L/AC:L/Au:N/C:N/I:N/A:C

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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-276Incorrect Default Permissions
T1112Modify Registry
T1499Endpoint Denial of Service

Public exploit references

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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