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CVE-2025-49683VulnerabilityPublished Updated

CVE-2025-49683: Microsoft Windows 10 Version 1507 · Integer Overflow or Wraparound

Affects Microsoft Windows 10 Version 1507Source CVE Database V5

0

Not known to be exploited · public exploit available (Exploit-DB) · CVSS 7.8 High.

Data as of 26 Oct 2026, 06:26 UTC

CVSS 3.1 base score
7.8High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
2.0% chance of exploitation in 30 days – higher than 81% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Exploitation evidence

t = 0 is the CVE’s publication on cve.org

  1. Disclosed: evidence found.

    CVE published 8 Jul 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  4. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

Timeline

  1. CVE ID reserved

    by microsoft

    , 29 days before disclosure

  2. CVE published

    on cve.org

    , t = 0

  3. In Threat Radar

    record ingested

    , 12 minutes after disclosure

  4. First Exploit-DB entry (opens in a new tab)

    Microsoft Virtual Hard Disk (VHDX) 11 - Remote Code Execution (RCE)

    , 26 days after disclosure

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-26.

What to do

Affected software

ProductAffectedFixed in
Microsoft Windows 10 Version 1507Affected
  • =10.0.10240.0
Fixed in–

AI-suggested

European organizations should prioritize upgrading all Windows 10 Version 1507 systems to a supported and fully patched Windows version to eliminate exposure to this vulnerability. If immediate upgrade is not feasible, organizations should implement strict local access controls and limit user permissions to reduce the risk of local exploitation. Employ application whitelisting and endpoint protection solutions capable of detecting and blocking suspicious VHDX file interactions. Educate users about the risks of opening untrusted VHDX files and implement policies to restrict the use of removable media or virtual disk files from unverified sources. Network segmentation can limit lateral movement if a system is compromised. Monitoring and logging of local file access and execution events related to VHDX files can help detect exploitation attempts. Organizations should stay alert for any Microsoft security advisories or patches addressing this vulnerability and apply them promptly. Finally, conduct regular vulnerability assessments and penetration testing focusing on legacy systems to identify and remediate similar risks.

Description

Integer overflow or wraparound in Virtual Hard Disk (VHDX) allows an unauthorized attacker to execute code locally.

References

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