CVE-2024-49147
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 · uneditedDeserialization of untrusted data in Microsoft Update Catalog allows an unauthorized attacker to elevate privileges on the website’s webserver.
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 confidenceA deserialization vulnerability exists in the Microsoft Update Catalog where untrusted data is processed without proper validation, enabling an unauthenticated attacker to achieve privilege escalation on the webserver hosting the 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 dataall versionsCVSS 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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Identify if Microsoft Update Catalog is installedCheck for the presence of the Microsoft Update Catalog service or website on the system. Look for IIS websites or application pools named 'Update Catalog' or similar, or check installed programs for Microsoft Update Catalog.Affected if The Microsoft Update Catalog is installed and present on the system
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Verify the Update Catalog service is runningCheck if the Microsoft Update Catalog website or service is currently running. In IIS, check the status of the application pool and website. For Windows services, check if the Update Catalog service is in a running state.Affected if The Update Catalog service or website is currently running and accessible
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Check network exposure of the Update CatalogReview IIS bindings and firewall rules to determine if the Update Catalog web application is exposed to network access. Verify which IP addresses and ports the website is listening on.Affected if The Update Catalog is accessible over the network, especially from untrusted networks
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Confirm the server hosts the Update Catalog web applicationIdentify the webserver hosting the Update Catalog service. Check IIS manager for sites running the Update Catalog application, or review web server configuration files for Update Catalog mappings.Affected if A webserver (IIS or other) is configured to host the Microsoft Update Catalog application
If Microsoft Update Catalog is installed and running on a webserver, the environment is affected since all versions are vulnerable to this deserialization flaw allowing privilege escalation.
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 Microsoft security patches as they become available for the Update Catalog service; ensure the webserver runs with minimal required privileges and implement network segmentation to limit exposure.
- Consultation2.0 h
- Implementation1.0 h
- Testing2.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2024-49147 — 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-2024-49147 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
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