High severity · published Dec 19, 2025
CVE-2025-14847
Zlib compressed protocol header length confusion may allow memory read
In wildKEV
7.5
CVSS
83.2%
EPSS
Yes
On KEV
Description
Mismatched length fields in Zlib compressed protocol headers may allow a read of uninitialized heap memory by an unauthenticated client. This issue affects all MongoDB Server v7.0 prior to 7.0.28 versions, MongoDB Server v8.0 versions prior to 8.0.17, MongoDB Server v8.2 versions prior to 8.2.3, MongoDB Server v6.0 versions prior to 6.0.27, MongoDB Server v5.0 versions prior to 5.0.32, MongoDB Server v4.4 versions prior to 4.4.30, MongoDB Server v4.2 versions greater than or equal to 4.2.0, MongoDB Server v4.0 versions greater than or equal to 4.0.0, and MongoDB Server v3.6 versions greater than or equal to 3.6.0.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)83.2% · higher than 100% of CVEs
Exploited in the wildYes
CISA KEVListed Dec 29, 2025
Federal remediation dueJan 19, 2026
Ransomware campaign useNot known
Affected products
Which versions
MO
MongoDB · MongoDB
3.6.0 before 4.4.30; 5.0.0 before 5.0.32; 6.0.0 before 6.0.27; 7.0.0 before 7.0.28; 8.0.0 before 8.0.17; 8.2.0 before 8.2.3 · source: NVD, KEV
MS
MongoDB Server · MongoDB Inc.
8.2 before 8.2.3; 8.0 before 8.0.17; 7.0 before 7.0.28; 6.0 before 6.0.27; 5.0 before 5.0.32; 4.4 before 4.4.30; +3 more · source: vendor
In the news
VulnerabilityHigh
ABB Ability Zenon
View CSAF
Summary
Successful exploitation of these vulnerabilities could allow attackers to bypass security, crash systems, execute unauthorized actions, or compromise data.
The following versions of ABB Ability Zenon are affected:
IIoT services with MongoDB (4.2) installed on ABB Ability Zenon vers:all/*
CVSS
Vendor
Equipment
Vulnerabilities
v3 7.8
ABB
ABB Ability Zenon
Improper Handling of Length Parameter Inconsistency, Improper Neutralization of Null Byte or NUL Character, Collapse of Data into Unsafe Value, Undefined Behavior for Input to API, Incorrect Regular Expression, Uncaught Exception, Reachable Assertion, Allocation of Resources Without Limits or Throttling, Out-of-bounds Write, Improper Output Neutralization for Logs, Improper Certificate Validation, Execution with Unnecessary Privileges
Background
Critical Infrastructure Sectors: Chemical, Communications, Critical Manufacturing, Dams, Energy, Healthcare and Public Health, Information Technology, Water and Wastewater
Countries/Areas Deployed: Worldwide
Company Headquarters Location: Switzerland
Vulnerabilities
Expand All +
CVE-2025-14847
Mismatched length fields in Zlib compressed protocol headers may allow a read of uninitialized heap memory by an unauthenticated client. This issue affects all MongoDB Server v7.0 prior to 7.0.28 versions, MongoDB Server v8.0 versions prior to 8.0.17, MongoDB Server v8.2 versions ...
Aug 6, 2026·CISA Advisories
VulnerabilityHigh
[CISA KEV] CVE-2025-14847: MongoDB MongoDB and MongoDB Server - MongoDB and MongoDB Server Improper Handling of Length Parameter Inconsistency Vulnerability
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.
MAMongoDB and MongoDB ServerCVE-2025-14847
Dec 29, 2025·CISA KEV
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-14847
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-14847
CISA KEV catalogue
https://www.cisa.gov/known-exploited-vulnerabilities-catalog
jira.mongodb.org
https://jira.mongodb.org/browse/SERVER-115508
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