PatchSiren

PatchSiren cyber security CVE debrief

CVE-2026-83795 Microsoft CVE debrief

A heap-based buffer overflow vulnerability exists in the Windows IKE Extension, which could allow an unauthorized attacker to deny service over a network. The vulnerability has a CVSS score of 7.5 and is classified as HIGH severity. This issue arises from improper handling of IKE Extension data, potentially allowing attackers to exploit this weakness and disrupt service. Defenders should assess their exposure, especially for Windows systems connected to the internet, and prioritize patching vulnerable systems to prevent potential denial-of-service attacks. Evidence is based on official CVE Program and NVD records, as well as Microsoft's patch and vendor advisory, which provide the

Vendor
Microsoft
Product
Windows 10 Version 1607
CVSS
HIGH 7.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-10-13
Original CVE updated
2026-10-27
Advisory published
2026-10-13
Advisory updated
2026-10-27

Who should care

Defenders responsible for Windows systems, especially those exposed to the internet, should assess their exposure and prioritize patching vulnerable systems to prevent potential denial-of-service attacks.

Why it matters

Defenders should prioritize patching vulnerable Windows systems, especially those exposed to the internet, to prevent potential denial-of-service attacks. The vulnerability has a CVSS score of 7.5 and is classified as HIGH severity. Evidence is based on official CVE Program and NVD records, as well as Microsoft's patch and vendor advisory.

  • Potential denial-of-service attacks over a network
  • Requires verification of affected versions and remediation from official sources
  • Patching vulnerable systems is a defensive priority
  • Exposure requires verification from the supplied official sources

Technical summary

The vulnerability exists in the Windows IKE Extension and could allow an unauthorized attacker to deny service over a network. The vulnerability has a CVSS score of 7.5 and is classified as HIGH severity. Microsoft has provided a patch and vendor advisory for the vulnerability.

Defensive priority

Defenders should prioritize patching vulnerable systems, especially those exposed to the internet, to prevent potential denial-of-service attacks.

Recommended defensive actions

  • Patch vulnerable systems, especially those exposed to the internet
  • Verify and apply the patch from Microsoft
  • Monitor for potential denial-of-service attacks

Evidence notes

The vulnerability is described in the CVE Program record and the NVD vulnerability detail page. Microsoft has provided a patch and vendor advisory for the vulnerability.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-83795 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-83795

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-83795 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-83795

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.