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NVD / CVE Program· CNA microsoft

CVE-2025-26686: Windows TCP/IP Remote Code Execution Vulnerability

Noroxi assessment

Priority: Monitor (action score 30/100)

  • Public proof-of-concept code exists (GitHub); there is no record of exploitation in the wild.
  • Probability of exploitation in the next 30 days: 1.3% (FIRST EPSS); higher than 72.3% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. A user must open a link or visit a page. Special conditions such as timing or configuration are required.
  • Fixed version: Windows 10 for 32-bit Systems 10.0.10240.20978; Windows 10 for x64-based Systems 10.0.10240.20978; Windows 10 Version 1607 for 32-bit Systems 10.0.14393.7969.

Low priority for now. Upgrade to Windows 10 for 32-bit Systems 10.0.10240.20978; Windows 10 for x64-based Systems 10.0.10240.20978; Windows 10 Version 1607 for 32-bit Systems 10.0.14393.7969 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

Sensitive data storage in improperly locked memory in Windows TCP/IP allows an unauthorized attacker to execute code over a network.

HighCVSS 7.5 · v3.1—Proof of concept Fix available
Published
Apr 8, 2025
Updated
Aug 10, 2026
EPSS
1.3% · 72th percentile

Report tools

JSON

Action score

30

Monitor

Low priority for now.

CVSS
30 / 40 · 7.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 1.3%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · microsoft
7.5
NVD has not scored this yet; the score shown is the CNA’s.

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/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
  • Proof of concept exists, no weaponized module
  • A fix has been released

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

Follow CVE-2025-26686

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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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.

VendorProduct
microsoftwindows 10 1507
microsoftwindows 10 1607
microsoftwindows 10 1809
microsoftwindows 10 21h2
microsoftwindows 10 22h2
microsoftwindows 11 22h2
microsoftwindows 11 23h2
microsoftwindows 11 24h2
microsoftwindows server 2008
microsoftwindows server 2012
microsoftwindows server 2016
microsoftwindows server 2019

and 3 more

Affected versions

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 10.0.14393.7969
  • microsoft windows server 2019before 10.0.17763.7136
  • microsoft windows server 2022before 10.0.20348.3453
  • microsoft windows server 2022 23h2before 10.0.25398.1551
  • microsoft windows server 2025before 10.0.26100.3775

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 10.0.10240.20978affected

  • Microsoft Windows 10 Version 1607

    • 10.0.14393.0 and later · before 10.0.14393.7969affected

  • Microsoft Windows 10 Version 1809

    • 10.0.17763.0 and later · before 10.0.17763.7136affected

  • Microsoft Windows 10 Version 21H2

    • 10.0.19044.0 and later · before 10.0.19044.5737affected

  • Microsoft Windows 10 Version 22H2

    • 10.0.19045.0 and later · before 10.0.19045.5737affected

  • Microsoft Windows 11 version 22H2

    • 10.0.22621.0 and later · before 10.0.22621.5189affected

  • Microsoft Windows 11 version 22H3

    • 10.0.22631.0 and later · before 10.0.22631.5189affected

  • Microsoft Windows 11 Version 23H2

    • 10.0.22631.0 and later · before 10.0.22631.5189affected

  • Microsoft Windows 11 Version 24H2

    • 10.0.26100.0 and later · before 10.0.26100.3775affected

  • Microsoft Windows Server 2008 R2 Service Pack 1

    • 6.1.7601.0 and later · before 6.1.7601.27670affected

  • Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation)

    • 6.1.7601.0 and later · before 6.1.7601.27670affected

  • Microsoft Windows Server 2008 Service Pack 2

    • 6.0.6003.0 and later · before 6.0.6003.23220affected

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-2025-26673Apr 8, 2025 · Windows Lightweight Directory Access Protocol (LDAP) Denial of Service Vulnerability
    31Monitor
  • ← EarlierCVE-2025-26679Apr 8, 2025 · RPC Endpoint Mapper Service Elevation of Privilege Vulnerability
    31Monitor
  • Later →CVE-2025-26688Apr 8, 2025 · Microsoft Virtual Hard Disk Elevation of Privilege Vulnerability
    31Monitor

Remediation

Which version to upgrade to

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

Product / packageFixed versionSource
Windows 10 for 32-bit Systems10.0.10240.20978 · KB5055547Microsoft (MSRC)
Windows 10 for x64-based Systems10.0.10240.20978 · KB5055547Microsoft (MSRC)
Windows 10 Version 1607 for 32-bit Systems10.0.14393.7969 · KB5055521Microsoft (MSRC)
Windows 10 Version 1607 for x64-based Systems10.0.14393.7969 · KB5055521Microsoft (MSRC)
Windows 10 Version 1809 for 32-bit Systems10.0.17763.7136 · KB5055519Microsoft (MSRC)
Windows 10 Version 1809 for x64-based Systems10.0.17763.7136 · KB5055519Microsoft (MSRC)
Windows 10 Version 21H2 for 32-bit Systems10.0.19044.5737 · KB5055518Microsoft (MSRC)
Windows 10 Version 21H2 for ARM64-based Systems10.0.19044.5737 · KB5055518Microsoft (MSRC)
Windows 10 Version 21H2 for x64-based Systems10.0.19044.5737 · KB5055518Microsoft (MSRC)
Windows 10 Version 22H2 for 32-bit Systems10.0.19045.5737 · KB5055518Microsoft (MSRC)
Windows 10 Version 22H2 for ARM64-based Systems10.0.19045.5737 · KB5055518Microsoft (MSRC)
Windows 10 Version 22H2 for x64-based Systems10.0.19045.5737 · KB5055518Microsoft (MSRC)
Windows 11 Version 22H2 for ARM64-based Systems10.0.22621.5189 · KB5055528Microsoft (MSRC)
Windows 11 Version 22H2 for x64-based Systems10.0.22621.5189 · KB5055528Microsoft (MSRC)
Windows 11 Version 23H2 for ARM64-based Systems10.0.22631.5189 · KB5055528Microsoft (MSRC)
Windows 11 Version 23H2 for x64-based Systems10.0.22631.5189 · KB5055528Microsoft (MSRC)
Windows 11 Version 24H2 for ARM64-based Systems10.0.26100.3775 · KB5055523Microsoft (MSRC)
Windows 11 Version 24H2 for x64-based Systems10.0.26100.3775 · KB5055523Microsoft (MSRC)
Windows Server 2008 for 32-bit Systems Service Pack 26.0.6003.23220 · KB5055609Microsoft (MSRC)
Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)6.0.6003.23220 · KB5055609Microsoft (MSRC)
Windows Server 2008 for x64-based Systems Service Pack 26.0.6003.23220 · KB5055609Microsoft (MSRC)
Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)6.0.6003.23220 · KB5055609Microsoft (MSRC)
Windows Server 2008 R2 for x64-based Systems Service Pack 16.1.7601.27670 · KB5055561Microsoft (MSRC)
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)6.1.7601.27670 · KB5055561Microsoft (MSRC)
Windows Server 20126.2.9200.25423 · KB5055581Microsoft (MSRC)
Windows Server 2012 (Server Core installation)6.2.9200.25423 · KB5055581Microsoft (MSRC)
Windows Server 2012 R26.3.9600.22523 · KB5055557Microsoft (MSRC)
Windows Server 2012 R2 (Server Core installation)6.3.9600.22523 · KB5055557Microsoft (MSRC)
Windows Server 201610.0.14393.7969 · KB5055521Microsoft (MSRC)
Windows Server 2016 (Server Core installation)10.0.14393.7969 · KB5055521Microsoft (MSRC)

+7

Exploit status

Proof of concept available

A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.

Evidence

  • Proof-of-concept repository on GitHub ×2

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Proof-of-concept repository on GitHubstars:332025-09-16
Proof-of-concept repository on GitHubstars:02025-12-10

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.

  1. Published
  2. First PoC+160 d
  3. TodayOct 31, 2026+571 d

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

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

  • CVE-2024-38106238 days apartWindows Kernel Elevation of Privilege VulnerabilityKEV
    60This week
  • CVE-2023-36005483 days apartWindows Telephony Server Elevation of Privilege Vulnerability
    39Monitor
  • CVE-2025-2403528 days apartWindows Remote Desktop Services Remote Code Execution Vulnerability
    33Monitor
  • CVE-2025-2129484 days apartMicrosoft Digest Authentication Remote Code Execution Vulnerability
    32Monitor
  • CVE-2024-43563182 days apartWindows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability
    31Monitor
  • CVE-2024-21446392 days apartNTFS Elevation of Privilege Vulnerability
    31Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • A user must open a link or visit a page.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-591 · Sensitive Data Storage in Improperly Locked Memory

CVSS vector

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

nvd-secondary

Attack context

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

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

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

References

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

All records