PatchTheCVECVE-2024-49147: Deserialization of untrusted data in Microsoft Update Catalog allows an unauthorized attacker to elevate privi
CVE-2024-49147 is a critical-severity flaw (CVSS 9.3) affecting update catalog. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Deserialization of untrusted data in Microsoft Update Catalog allows an unauthorized attacker to elevate privileges on the website’s webserver.
Why this priority
- Critical severity
- Remotely exploitable, no login, no user action
- On your watchlist
No fix is published yet: follow the downgrade or mitigation steps.
Risk facts
| CVSS score | 9.3 (Critical) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 1.3% (top 30%) |
| CISA exploited list | No |
| Weakness | CWE-502 |
| Published | 2024-12-12 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2024-49147?
update catalog: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.
Is CVE-2024-49147 being exploited?
CVE-2024-49147 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2024-49147 affect?
CVE-2024-49147 affects update catalog. Severity is critical (CVSS 9.3). Deserialization of untrusted data in Microsoft Update Catalog allows an unauthorized attacker to elevate privileges on the website’s webserver.
How urgent is CVE-2024-49147?
Priority 60/100. Critical severity; Remotely exploitable, no login, no user action; On your watchlist