Security Resilience

CVE-2026-85806

Memory Safety in Microsoft Windows 10 1607 ≤ 10.0.14393.9612

Memory Safety
Published
13 October 2026
Modified
16 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 0.0091 60th 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-2026-85806 is a critical-severity Stack-based Buffer Overflow (CWE-121) vulnerability in Microsoft Windows 10 1607. Its CVSS base score is 9.8 (Critical).

Operationally, exploitation aligns with the MITRE ATT&CK technique Compromise Infrastructure (T1584); ranked in the top 40% 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

Integer underflow (wrap or wraparound) in Network Policy Server (NPS) allows an unauthorized attacker to execute code over a network.

CWE(s)
CWE-121CWE-191

Related Threats

MITRE ATT&CK Enterprise Techniques

T1584 Compromise Infrastructure Resource Development
Adversaries may compromise third-party infrastructure that can be used during targeting.
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 →
T1203 Exploitation for Client Execution Execution
Adversaries may exploit software vulnerabilities in client applications to execute code.
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 →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2026-83869Same product: Microsoft Windows 10 1607
CVE-2026-96844Same product: Microsoft Windows 10 1607
CVE-2026-83857Same product: Microsoft Windows 10 1607
CVE-2026-83860Same product: Microsoft Windows 10 1607
CVE-2026-83934Same product: Microsoft Windows 10 1607
CVE-2026-87711Same product: Microsoft Windows 10 1607
CVE-2026-71352Same product: Microsoft Windows 10 1607
CVE-2026-69269Same product: Microsoft Windows 10 1607
CVE-2026-69687Same product: Microsoft Windows 10 1607
CVE-2026-69461Same 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)
  • 2 hardening rules · 2 OS baselines
Validate
Prove the fix (OWASP ASVS)

—

Mitigating Controls (NIST 800-53 r5) AI

SA-11 Developer Testing and Evaluation partial match

Developer testing and analysis can discover stack-buffer overflows before deployment.

SA-8 Security and Privacy Engineering Principles partial match

Secure-engineering principles include bounds-checked coding and safe buffer handling that avoid introducing the flaw.

SI-10 Information Input Validation partial match

Input validation directly stops untrusted data from exceeding stack buffer bounds.

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 SDLC practices directly prevent integer underflow defects via input validation, bounds checking, and static analysis.

ID.RA-01 partial match
blocks

Vulnerability scanning can discover stack buffer overflows but does not prevent their introduction.

PR.PS-02 partial match
blocks

Patching eliminates known instances of the weakness after discovery.

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 (fuzzing, static analysis) detects stack overflows before release.

A.8.28 Secure coding partial match
prevents

Secure coding standards explicitly forbid unsafe buffer handling that causes CWE-121.

Hardening callouts derived

Configuration rules from DISA STIG baselines that bear on weaknesses of the type cited by this CVE. Each rule is shown with the relationship its mapping actually records, against the CWE it was authored against. Derived via CVE→CWE over `controls_xwalks` (higher-evidence rows only; rows rated `none` are excluded).

Oracle Linux 8 (1 rule)
  • V-248594 OL 8 must implement address space layout randomization (ASLR) to protect its memory from unauthorized code execution. blocks CWE-121
Oracle Linux 9 (1 rule)
  • V-271452 OL 9 must use a Linux Security Module configured to enforce limits on system services. blocks CWE-121

References