CVE-2021-33592
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 · uneditedNAVER Toolbar before 4.0.30.323 allows remote attackers to execute arbitrary code via a crafted upgrade.xml file. Special characters in filename parameter can be the cause of bypassing code signing check function.
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 confidenceNAVER Toolbar before version 4.0.30.323 contains a vulnerability in its update mechanism where specially crafted upgrade.xml files can bypass code signing verification via special characters in the filename parameter. This allows remote attackers to execute arbitrary code without authentication, as the code signing check that normally validates update integrity can be circumvented.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data< 4.0.30.323CVSS 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
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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 checksWork through these to decide whether this CVE applies to you.
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Locate NAVER Toolbar installationCheck common installation directories (Program Files, Program Files x86) and Windows Registry under HKLM\Software\Microsoft\Windows\CurrentVersion\Uninstall for Naver Toolbar entriesAffected if NAVER Toolbar is found on the system
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Identify installed versionRead the version information from the toolbar's executable or registry entry (look for DisplayVersion value)Affected if Version is less than 4.0.30.323 or cannot be determined
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Verify version formatCompare the found version number against 4.0.30.323 using standard version comparison (each numeric segment: 4.0.30.323)Affected if Any segment is lower than the corresponding segment in 4.0.30.323
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Check update mechanism configurationExamine toolbar settings or related configuration files for automatic update preferencesAffected if Automatic updates are enabled and version is below 4.0.30.323
If NAVER Toolbar is installed and its version is determined to be lower than 4.0.30.323, the environment is affected by this vulnerability.
Generated from the published advisory. Verify against your own configuration.
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 · scoped4.0.30.323
Upgrade to NAVER Toolbar version 4.0.30.323 or later which contains the security fix. If immediate patching is not possible, consider disabling automatic updates or implementing network-level controls to block untrusted update sources.
4.0.30.323 or later
- 1. Identify the current version of NAVER Toolbar installed in the environment
- 2. If the current version is below 4.0.30.323, plan for an upgrade to version 4.0.30.323 or later
- 3. Download the updated NAVER Toolbar version 4.0.30.323 or latest available version from the official vendor source
- 4. Test the upgrade in a non-production environment to verify compatibility
- 5. Deploy the upgraded version to production environments
- 6. Verify the upgrade was successful by checking the installed version
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation4.0 h
- Implementation16.0 h
- Testing8.0 h
- Review / QA4.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $8,960.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-33592 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2021-33592 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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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.
- 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