NVD / CVE Program· CNA microsoft

CVE-2025-29954: Windows Lightweight Directory Access Protocol (LDAP) Denial of Service Vulnerability

MediumCVSS 5.9 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 23/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 1.4% (FIRST EPSS); higher than 74.1% of all records.
Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. Special conditions such as timing or configuration are required.
Fixed version: Windows 10 for 32-bit Systems 10.0.10240.21014; Windows 10 for x64-based Systems 10.0.10240.21014; Windows 10 Version 1607 for 32-bit Systems 10.0.14393.8066.

Low priority for now. Upgrade to Windows 10 for 32-bit Systems 10.0.10240.21014; Windows 10 for x64-based Systems 10.0.10240.21014; Windows 10 Version 1607 for 32-bit Systems 10.0.14393.8066 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Uncontrolled resource consumption in Windows LDAP - Lightweight Directory Access Protocol allows an unauthorized attacker to deny service over a network.

BDU:2025-05576

Published: May 13, 2025
Updated: Jun 17, 2026
EPSS: 1.4% · 74th percentile
CWE: CWE-400

Report tools

JSON

Action score

Monitor

Low priority for now.

CVSS: 23 / 40 · 5.9 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 1.4%

CISA SSVC decision

Exploitation: none
Automatable: no
Technical impact: partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: —
CNA · microsoft: 5.9; NVD has not scored this yet; the score shown is the CNA’s.

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Is your version affected? Check it

Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
microsoft	windows 10 1507	cpe:2.3:o:microsoft:windows_10_1507
microsoft	windows 10 1607	cpe:2.3:o:microsoft:windows_10_1607
microsoft	windows 10 1809	cpe:2.3:o:microsoft:windows_10_1809
microsoft	windows 10 21h2	cpe:2.3:o:microsoft:windows_10_21h2
microsoft	windows 10 22h2	cpe:2.3:o:microsoft:windows_10_22h2
microsoft	windows 11 22h2	cpe:2.3:o:microsoft:windows_11_22h2
microsoft	windows 11 23h2	cpe:2.3:o:microsoft:windows_11_23h2
microsoft	windows server 2008	cpe:2.3:o:microsoft:windows_server_2008
microsoft	windows server 2012	cpe:2.3:o:microsoft:windows_server_2012
microsoft	windows server 2016	cpe:2.3:o:microsoft:windows_server_2016
microsoft	windows server 2019	cpe:2.3:o:microsoft:windows_server_2019
microsoft	windows server 2022	cpe:2.3:o:microsoft:windows_server_2022

and 1 more

Versions reported by the vendor

Affected version ranges reported by the assigning authority (microsoft). Independent of NVD's CPE analysis and usually ahead of it.

Microsoft Windows 10 Version 1507
- 10.0.10240.0 and later · before 10.0.10240.21014affected
Microsoft Windows 10 Version 1607
- 10.0.14393.0 and later · before 10.0.14393.8066affected
Microsoft Windows 10 Version 1809
- 10.0.17763.0 and later · before 10.0.17763.7314affected
Microsoft Windows 10 Version 21H2
- 10.0.19044.0 and later · before 10.0.19044.5854affected
Microsoft Windows 10 Version 22H2
- 10.0.19045.0 and later · before 10.0.19045.5854affected
Microsoft Windows 11 version 22H2
- 10.0.22621.0 and later · before 10.0.22621.5335affected
Microsoft Windows 11 version 22H3
- 10.0.22631.0 and later · before 10.0.22631.5335affected
Microsoft Windows 11 Version 23H2
- 10.0.22631.0 and later · before 10.0.22631.5335affected
Microsoft Windows Server 2008 R2 Service Pack 1
- 6.1.7601.0 and later · before 6.1.7601.27729affected
Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation)
- 6.1.7601.0 and later · before 6.1.7601.27729affected
Microsoft Windows Server 2008 Service Pack 2
- 6.0.6003.0 and later · before 6.0.6003.23279affected
Microsoft Windows Server 2008 Service Pack 2 (Server Core installation)
- 6.0.6003.0 and later · before 6.0.6003.23279affected

Affected versions · NVD (8)

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

microsoft windows server 2008all versions
microsoft windows server 2008r2
microsoft windows server 2012all versions
microsoft windows server 2012r2
microsoft windows server 2016before 10.0.14393.8066
microsoft windows server 2019before 10.0.17763.7314
microsoft windows server 2022before 10.0.20348.3692
microsoft windows server 2022 23h2before 10.0.25398.1611

Same product

microsoft: all records

Other highest-scoring records for the same primary product.

CVE-2021-34527Windows Print Spooler Remote Code Execution VulnerabilityKEV
95Now
CVE-2021-40444Microsoft MSHTML Remote Code Execution VulnerabilityKEV
94Now
CVE-2025-33053Internet Shortcut Files Remote Code Execution VulnerabilityKEV
91Now

Published before and after this one in the same product

← EarlierCVE-2025-29840May 13, 2025 · Windows Media Remote Code Execution Vulnerability
35Monitor
← EarlierCVE-2025-29842May 13, 2025 · UrlMon Security Feature Bypass Vulnerability
30Monitor
Later →CVE-2025-29956May 13, 2025 · Windows SMB Information Disclosure Vulnerability
21Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
Windows 10 for 32-bit Systems	10.0.10240.21014 · KB5058387	Microsoft (MSRC)
Windows 10 for x64-based Systems	10.0.10240.21014 · KB5058387	Microsoft (MSRC)
Windows 10 Version 1607 for 32-bit Systems	10.0.14393.8066 · KB5058383	Microsoft (MSRC)
Windows 10 Version 1607 for x64-based Systems	10.0.14393.8066 · KB5058383	Microsoft (MSRC)
Windows 10 Version 1809 for 32-bit Systems	10.0.17763.7314 · KB5058392	Microsoft (MSRC)
Windows 10 Version 1809 for x64-based Systems	10.0.17763.7314 · KB5058392	Microsoft (MSRC)
Windows 10 Version 21H2 for 32-bit Systems	10.0.19044.5854 · KB5058379	Microsoft (MSRC)
Windows 10 Version 21H2 for ARM64-based Systems	10.0.19044.5854 · KB5058379	Microsoft (MSRC)
Windows 10 Version 21H2 for x64-based Systems	10.0.19044.5854 · KB5058379	Microsoft (MSRC)
Windows 10 Version 22H2 for 32-bit Systems	10.0.19045.5854 · KB5058379	Microsoft (MSRC)
Windows 10 Version 22H2 for ARM64-based Systems	10.0.19045.5854 · KB5058379	Microsoft (MSRC)
Windows 10 Version 22H2 for x64-based Systems	10.0.19045.5854 · KB5058379	Microsoft (MSRC)
Windows 11 Version 22H2 for ARM64-based Systems	10.0.22621.5335 · KB5058405	Microsoft (MSRC)
Windows 11 Version 22H2 for x64-based Systems	10.0.22621.5335 · KB5058405	Microsoft (MSRC)
Windows 11 Version 23H2 for ARM64-based Systems	10.0.22631.5335 · KB5058405	Microsoft (MSRC)
Windows 11 Version 23H2 for x64-based Systems	10.0.22631.5335 · KB5058405	Microsoft (MSRC)
Windows Server 2008 for 32-bit Systems Service Pack 2	6.0.6003.23279 · KB5058449	Microsoft (MSRC)
Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)	6.0.6003.23279 · KB5058449	Microsoft (MSRC)
Windows Server 2008 for x64-based Systems Service Pack 2	6.0.6003.23279 · KB5058449	Microsoft (MSRC)
Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)	6.0.6003.23279 · KB5058449	Microsoft (MSRC)
Windows Server 2008 R2 for x64-based Systems Service Pack 1	6.1.7601.27729 · KB5058430	Microsoft (MSRC)
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)	6.1.7601.27729 · KB5058430	Microsoft (MSRC)
Windows Server 2012	6.2.9200.25475 · KB5058451	Microsoft (MSRC)
Windows Server 2012 (Server Core installation)	6.2.9200.25475 · KB5058451	Microsoft (MSRC)
Windows Server 2012 R2	6.3.9600.22577 · KB5058403	Microsoft (MSRC)
Windows Server 2012 R2 (Server Core installation)	6.3.9600.22577 · KB5058403	Microsoft (MSRC)
Windows Server 2016	10.0.14393.8066 · KB5058383	Microsoft (MSRC)
Windows Server 2016 (Server Core installation)	10.0.14393.8066 · KB5058383	Microsoft (MSRC)
Windows Server 2019	10.0.17763.7314 · KB5058392	Microsoft (MSRC)
Windows Server 2019 (Server Core installation)	10.0.17763.7314 · KB5058392	Microsoft (MSRC)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

CVE-2025-5372291 days apartWindows Remote Desktop Services Denial of Service Vulnerability
37Monitor
CVE-2025-3272428 days apartWindows Local Security Authority Subsystem Service (LSASS) Denial of Service Vulnerability
31Monitor
CVE-2025-2664135 days apartMicrosoft Message Queuing (MSMQ) Denial of Service Vulnerability
31Monitor
CVE-2025-2667335 days apartWindows Lightweight Directory Access Protocol (LDAP) Denial of Service Vulnerability
31Monitor
CVE-2025-2746935 days apartWindows Lightweight Directory Access Protocol (LDAP) Denial of Service Vulnerability
31Monitor
CVE-2025-2747335 days apartHTTP.sys Denial of Service Vulnerability
31Monitor

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · public bounty program.

Technical details

Attack conditions

Anyone who can reach it over the internet can trigger it.
No account or password is required.
No user action is required.
Special conditions such as timing or configuration are required.

If successful

Confidentiality: none
Integrity: none
Availability: high · the service can be disrupted

Attack vector: Network
Attack complexity: High
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality impact: None
Integrity impact: None
Availability impact: High

Weakness class (CWE)

CWE-400 · Uncontrolled Resource Consumption

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

nvd-secondary

Root cause

Code that parses nested structures sets no depth or size limit. A small input can turn into a disproportionate processing load.

The bug in code

The whole CWE-400 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1function expand(node) {
2  return node.children.map(expand);
3}

Fixed

1const MAX_DEPTH = 32;
2function expand(node, depth = 0) {
3  if (depth > MAX_DEPTH) throw new Error("too deep");
4  return node.children.map((c) => expand(c, depth + 1));
5}

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Attack patterns (CAPEC)

ATT&CK techniques

Endpoint Denial of ServiceT1499

Change log (1)

Fix✗ → ✓Oct 6, 2026, 3:35 AM UTC

For records you follow, these changes also arrive as notifications. →

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2025-29954

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records