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Vulnerabilities

Vulnerability · CVE-2026-62727

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Telephony Service allows an authorized attacker to elevate privi…

Published Aug 19, 2026 · catalog updated Oct 26, 2026 · windows 10 1607

Last checked Oct 26, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-62727. EPSS is 0.20%. Act only if a listed version of windows 10 1607 is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
High7.0
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.20%
Remediation
Version ranges on file
Affected products
cpe microsoft/windows 10 1607 · cpe microsoft/windows 10 1809 · cpe microsoft/windows 10 21h2 · cpe microsoft/windows 10 22h2

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Telephony Service allows an authorized attacker to elevate privileges locally.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe microsoft/windows 10 1607< 10.0.14393.9418
  • cpe microsoft/windows 10 1809< 10.0.17763.9121
  • cpe microsoft/windows 10 21h2< 10.0.19044.7663
  • cpe microsoft/windows 10 22h2< 10.0.19045.7663

How to fix CVE-2026-62727

  • Upgrade

    CVE-2026-62727 lists a fix boundary at 10.0.14393.9418. Compare the installed build with that boundary before you change production.

  • Version check

    Affected < 10.0.14393.9418

  • Advisory

    Open the cve_org record and follow its fix.

  • Official advisories

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-62727. EPSS is 0.20%. Act only if a listed version of windows 10 1607 is installed.

Which versions are affected?

Compare what you have installed with microsoft/windows 10 1607 < 10.0.14393.9418; microsoft/windows 10 1809 < 10.0.17763.9121; microsoft/windows 10 21h2 < 10.0.19044.7663; microsoft/windows 10 22h2 < 10.0.19045.7663. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-362: Race Condition. EPSS 0.20%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Windows security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Aug 19, 2026 · NIST NVD

    Detected

    Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Telephony Service allows an authorized attacker to elevate privileges locally.

  2. Oct 26, 2026 · NIST NVD

    Updated

    Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Telephony Service allows an authorized attacker to elevate privileges locally.

Sources

  • CVE.orgVulnerability recordCVE-2026-62727

    Official CVE identifier

    cve.org
  • NIST NVDVulnerability recordCVE-2026-62727

    Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Telephony Service allows an authorized attacker to elevate privileges locally.

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 26, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • CVE.orgOct 26, 2026
  • NIST NVDOct 26, 2026