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October 9, 2026

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CVE-2025-47981NVD

Vulnerability Summary

Heap-based buffer overflow in Windows SPNEGO Extended Negotiation allows an unauthorized attacker to execute code over a network.
Severity Level
CRITICAL(9.8)
Published Date
Jul 8, 2025
Last Modified
Sep 15, 2025
Exploitation Status
No confirmed exploitation yet
EPSS Score (30-Day)
Data Pending
Root Weakness (CWE)
CWE-122: Unknown/Unlisted Weakness ↗
Refer to the official MITRE database for detailed architectural specifications regarding this weakness.
CVSS v3.1 Base Metrics — Score 9.8 (CRITICAL)
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

Affected & Patched Versions

Affected Versions
  • Microsoft Windows 10 1507 < 10.0.10240.21073
  • Microsoft Windows 10 1607 < 10.0.14393.8246
  • Microsoft Windows 10 1809 < 10.0.17763.7558
  • Microsoft Windows 10 21h2 < 10.0.19044.6093
  • Microsoft Windows 10 22h2 < 10.0.19045.6093
  • Microsoft Windows 11 22h2 < 10.0.22621.5624
  • Microsoft Windows 11 23h2 < 10.0.22631.5624
  • Microsoft Windows 11 24h2 < 10.0.26100.4652
  • Microsoft Windows Server 2008
  • Microsoft Windows Server 2012
  • Microsoft Windows Server 2016 < 10.0.14393.8246
  • Microsoft Windows Server 2019 < 10.0.17763.7558
  • Microsoft Windows Server 2022 < 10.0.20348.3932
  • Microsoft Windows Server 2022 23h2 < 10.0.25398.1732
  • Microsoft Windows Server 2025 < 10.0.26100.4652
Patched Versions
  • Microsoft Windows 10 1507 10.0.10240.21073
  • Microsoft Windows 10 1607 10.0.14393.8246
  • Microsoft Windows 10 1809 10.0.17763.7558
  • Microsoft Windows 10 21h2 10.0.19044.6093
  • Microsoft Windows 10 22h2 10.0.19045.6093
  • Microsoft Windows 11 22h2 10.0.22621.5624
  • Microsoft Windows 11 23h2 10.0.22631.5624
  • Microsoft Windows 11 24h2 10.0.26100.4652
  • Microsoft Windows Server 2016 10.0.14393.8246
  • Microsoft Windows Server 2019 10.0.17763.7558
  • Microsoft Windows Server 2022 10.0.20348.3932
  • Microsoft Windows Server 2022 23h2 10.0.25398.1732
  • Microsoft Windows Server 2025 10.0.26100.4652
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🎁7-Day Free Trial — Try Pro or Team, no card required.
📧Email Delivery — Threat intel straight to your inbox.
♾️Unlimited Vendors — Track your entire stack.
🚨All New CVEs — Be the first to know.
📈EPSS Spike Alerts — Catch rising risk before it peaks.
🎯Custom EPSS/CVSS — Filter noise, focus on risk.
🛡️Exploit Intel — A 2nd confirmed-exploit signal beyond KEV.
🐙GitHub Issues — Auto-tracked, no duplicates.
📬Weekly Digest — One clean summary, not inbox spam.
🏷️Watchlist Groups — Tag alerts by team (Infra/AppSec/SOC).
💬Webhooks — Slack & Teams integration.
🔀Smart Routing — Critical alerts to one channel, rest to another.
🚫Ad-Free — Uninterrupted experience.

External References