Exploited vulnerabilities / CVE-2025-14847
Confirmed exploited · exploited vulnerability · MongoDB and MongoDB ServerCVE-2025-14847
MongoDB and MongoDB Server exploited vulnerability, confirmed exploited in the wild.
MongoDB Server contains an improper handling of length parameter inconsistency vulnerability in Zlib compressed protocol headers. This vulnerability may allow a read of uninitialized heap memory by an unauthenticated client.
| CISA's name for it | MongoDB and MongoDB Server Improper Handling of Length Parameter Inconsistency Vulnerability |
|---|---|
| Vendor and product | MongoDB · MongoDB and MongoDB Server |
| Type | exploited vulnerability · CWE-130 |
| Exploited | Confirmed by CISA listed 29 December 2025 |
| Likelihood | one of the most likely to be exploited of every vulnerability tracked |
| Deadline | 19 January 2026 · already passed |
| Used in ransomware | Not reported |
| Advisories | jira.mongodb.org ↗ · nvd.nist.gov ↗ |
Three steps, in this order
Apply the vendor's fix or mitigation; CISA lists only vulnerabilities seen exploited.
If you cannot patch now, restrict network access to the affected product.
Check for signs of compromise since the date it was added to the list.
| CISA's required action | Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. |
|---|
Know before someone else finds it
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CVE-2025-14847 in short
Is CVE-2025-14847 being exploited?
Yes. CISA added CVE-2025-14847 to its Known Exploited Vulnerabilities catalogue on 29 December 2025, which it does only on evidence of exploitation in the wild.
What is the CISA deadline for CVE-2025-14847?
US federal agencies must remediate it by 19 January 2026. Everyone else should treat that date as the latest safe point to patch an internet-facing system.
How likely is CVE-2025-14847 to be exploited in the next 30 days?
FIRST's Exploit Prediction Scoring System gives it 83%, the 99th percentile of every CVE it scores.
How do I fix CVE-2025-14847?
Apply the vendor's fix or mitigation; CISA lists only vulnerabilities seen exploited. If you cannot patch now, restrict network access to the affected product. Check for signs of compromise since the date it was added to the list.
Sources: CISA Known Exploited Vulnerabilities catalogue (released 10 November 2026) and FIRST EPSS. Page compiled automatically by SAK T.L.M, the threat-intelligence tool of SAK T.E.C, on 13 November 2026.