Security Resilience

CVE-2026-100222

Memory Safety in Microsoft Windows 10 1607 ≤ 10.0.14393.9612

Memory Safety
Published
13 October 2026
Modified
20 October 2026
Patch / advisory
View advisory
CVSS Score v3.1 9.8
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.011 64th percentile
Risk Priority 73 floored blend · peak EPSS

CVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). EPSS scores by FIRST (EPSS SIG), generated by Empirical Security. Risk Priority is our own derived reading, not an NVD score.

Summary

CVE-2026-100222 is a critical-severity Heap-based Buffer Overflow (CWE-122) vulnerability in Microsoft Windows 10 1607. Its CVSS base score is 9.8 (Critical).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Client Execution (T1203); ranked in the top 36% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified map to SA-11 (Developer Testing and Evaluation) and SA-8 (Security and Privacy Engineering Principles) — see the control section below for these in your framework.

EU & UK References

Vulnerability Data

Heap-based buffer overflow in Network Policy Server (NPS) allows an unauthorized attacker to execute code over a network.

CWE(s)
CWE-122CWE-191

Related Threats

MITRE ATT&CK Enterprise Techniques

T1203 Exploitation for Client Execution Execution
Adversaries may exploit software vulnerabilities in client applications to execute code.
attack.mitre.org →
T1584.008 Network Devices Resource Development
Adversaries may compromise third-party network devices that can be used during targeting.
attack.mitre.org →
T1068 Exploitation for Privilege Escalation Privilege Escalation
Adversaries may exploit software vulnerabilities in an attempt to elevate privileges.
attack.mitre.org →
T1189 Drive-by Compromise Initial Access
Adversaries may gain access to a system through a user visiting a website over the normal course of browsing.
attack.mitre.org →
T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
T1210 Exploitation of Remote Services Lateral Movement
Adversaries may exploit remote services to gain unauthorized access to internal systems once inside of a network.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2026-68827Same product: Microsoft Windows 10 1607
CVE-2026-69421Same product: Microsoft Windows 10 1607
CVE-2026-42980Same product: Microsoft Windows 10 1607
CVE-2026-62741Same product: Microsoft Windows 10 1607
CVE-2026-69824Same product: Microsoft Windows 10 1607
CVE-2026-69276Same product: Microsoft Windows 10 1607
CVE-2026-50308Same product: Microsoft Windows 10 1607
CVE-2026-49790Same product: Microsoft Windows 10 1607
CVE-2025-59242Same product: Microsoft Windows 10 1607
CVE-2026-32149Same product: Microsoft Windows 10 1607

Affected Assets

microsoft
windows 10 1607
≤ 10.0.14393.9612 · ≤ 10.0.14393.9612
microsoft
windows 10 1809
≤ 10.0.17763.9376 · ≤ 10.0.17763.9376
microsoft
windows 10 21h2
≤ 10.0.19044.7807 · ≤ 10.0.19044.7807 · ≤ 10.0.19044.7807
microsoft
windows 10 22h2
≤ 10.0.19045.7807 · ≤ 10.0.19045.7807 · ≤ 10.0.19045.7807
microsoft
windows 11 23h2
≤ 10.0.22631.7652 · ≤ 10.0.22631.7652
microsoft
windows 11 24h2
≤ 10.0.26100.9711 · ≤ 10.0.26100.9711
microsoft
windows 11 25h2
≤ 10.0.26200.9711 · ≤ 10.0.26200.9711
microsoft
windows 11 26h1
≤ 10.0.28000.3231 · ≤ 10.0.28000.3231
microsoft
windows 11 26h2
≤ 10.0.26300.9711 · ≤ 10.0.26300.9711
microsoft
windows server 2012
all versions, r2
+4 more product configuration(s) — see NVD for full list

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)
  • V1.4.1

Mitigating Controls (NIST 800-53 r5) AI

SA-11 Developer Testing and Evaluation partial match

Developer testing and evaluation (including fuzzing and memory-error detectors) can discover heap overflows after they have been coded.

SA-8 Security and Privacy Engineering Principles partial match

Security engineering principles require use of memory-safe constructs and bounds-checked allocation routines that avoid introducing heap overflows.

SI-10 Information Input Validation partial match

Input validation enforces bounds checking on data written to heap buffers, directly stopping the overflow condition from being introduced.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 full match
blocks

Secure-development practices directly require bounds checking and safe memory handling that prevent heap overflows.

ID.RA-01 partial match
blocks

Vulnerability scanning and recording can discover heap-overflow flaws but does not prevent their introduction in code.

PR.PS-02 partial match
blocks

Timely patching removes known heap-overflow instances after they exist.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.29 Security testing in development and acceptance mostly match
finds

Security testing in development and acceptance can detect heap overflows before release.

A.8.28 Secure coding partial match
prevents

Secure coding standards directly prescribe techniques (safe functions, bounds checks) that prevent heap-based buffer overflows.

References