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Fencer Vulns
medium 6.5

CVE-2026-62814 json

Windows DHCP Server Information Disclosure Vulnerability

published 2026-08-11 2 mo ago modified 2026-10-30 9 d ago also EUVD-2026-56674

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 45%
public exploits
0
none known

Summary

Integer underflow (wrap or wraparound) in Windows DHCP Server allows an unauthorized attacker to disclose information over an adjacent network.

Patch / fix

  • Microsoft Windows Server 2012 6.2.9200.26280
  • Microsoft Windows Server 2012 (Server Core installation) 6.2.9200.26280
  • Microsoft Windows Server 2012 R2 6.3.9600.23338
  • Microsoft Windows Server 2012 R2 (Server Core installation) 6.3.9600.23338
  • Microsoft Windows Server 2016 10.0.14393.9418
  • Microsoft Windows Server 2016 (Server Core installation) 10.0.14393.9418
  • Microsoft Windows Server 2019 10.0.17763.9121
  • Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.9121
  • Microsoft Windows Server 2022 10.0.20348.5499
  • Microsoft Windows Server 2025 10.0.26100.33296
  • Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.33296

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 mo ago

Exploit prediction

0.54% chance of exploitation in the next 30 days, higher than 45% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 6.5 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
CNA 3.1 6.5 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

  • Microsoft Windows Server 2012
  • Microsoft Windows Server 2012 (Server Core installation)
  • Microsoft Windows Server 2012 R2
  • Microsoft Windows Server 2012 R2 (Server Core installation)
  • Microsoft Windows Server 2016
  • Microsoft Windows Server 2016 (Server Core installation)
  • Microsoft Windows Server 2019
  • Microsoft Windows Server 2019 (Server Core installation)
  • Microsoft Windows Server 2022
  • Microsoft Windows Server 2025
  • Microsoft Windows Server 2025 (Server Core installation)

Classification

Weakness
  • CWE-191 Integer Underflow (Wrap or Wraparound)
  • CWE-125 Out-of-bounds Read

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.