CVE-2021-33601
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 · uneditedA vulnerability was discovered in the web user interface of F-Secure Internet Gatekeeper. An authenticated user can modify settings through the web user interface in a way that could lead to an arbitrary code execution on the F-Secure Internet Gatekeeper server.
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 · high confidenceAuthenticated RCE vulnerability in F-Secure Internet Gatekeeper's web UI allows any authenticated user to modify settings in a way that leads to arbitrary code execution on the server. The attacker needs valid credentials to the web interface but can then achieve remote code execution with the privileges of the web service.
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>= 5.10, <= 5.50.47CVSS 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
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:L/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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Identify F-Secure Internet Gatekeeper installationLocate the F-Secure Internet Gatekeeper application on the system. Common installation paths on Windows include C:\Program Files\F-Secure\ or C:\Program Files (x86)\F-Secure\. Check for the presence of the Internet Gatekeeper program directory or service.Affected if The product is not installed on the system.
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Determine installed versionCheck the installed version of F-Secure Internet Gatekeeper. This can typically be found in the application's About section within the web UI, or by checking the executable properties of the main gateway process. Compare your version against the affected range 5.10 through 5.50.47.Affected if The installed version falls within >= 5.10 and <= 5.50.47.
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Verify web management interface statusDetermine if the web-based management interface is enabled and accessible. Check whether the web service (typically running on ports 9012, 9013, or similar) is listening. Inspect the service configuration to confirm the management UI is active.Affected if The web management interface is enabled and exposed.
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Assess web UI authentication configurationReview the authentication settings for the web management interface. Check whether default credentials remain in use, whether strong password policies are enforced, and if the interface permits authentication from the network.Affected if The web UI can be accessed over the network with valid user credentials.
The system is affected if F-Secure Internet Gatekeeper versions 5.10 through 5.50.47 are installed with the web management interface accessible over the network using valid credentials.
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.
From vendor dataApply vendor patches when available. Until then, restrict access to the web management interface to only trusted administrators, use strong authentication, and consider network segmentation to limit exposure.
- Consultation3.0 h
- Implementation2.0 h
- Testing4.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-33601 — 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-2021-33601 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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- 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