CVE-2026-62817
Windows DNS Server Remote Code Execution Vulnerability
HIGH
8.8
CVSS Score
Published: August 11, 2026 at 05:04 PM UTC
Updated: October 28, 2026 at 08:05 PM UTC
10 products affected across 1 vendorWindows Server 2019Windows 10 1809Windows Server 2022
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Severity
HIGH8.8
Exploit prediction
EPSS 0.5%
SSVC
No known exploit
Description
Out-of-bounds write in Windows DNS allows an unauthorized attacker to execute code over an adjacent network.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
v < 10.0.17763.9121
Affected range stops below 10.0.17763.9121, so it looks safe — our inference, not a vendor statement
v < 10.0.19044.7663
Affected range stops below 10.0.19044.7663, so it looks safe — our inference, not a vendor statement
v < 10.0.19045.7663
Affected range stops below 10.0.19045.7663, so it looks safe — our inference, not a vendor statement
v < 10.0.22631.7517
Affected range stops below 10.0.22631.7517, so it looks safe — our inference, not a vendor statement
v < 10.0.26100.9106
Affected range stops below 10.0.26100.9106, so it looks safe — our inference, not a vendor statement
v < 10.0.26200.9106
Affected range stops below 10.0.26200.9106, so it looks safe — our inference, not a vendor statement
v < 10.0.28000.2704
Affected range stops below 10.0.28000.2704, so it looks safe — our inference, not a vendor statement
v < 10.0.17763.912110.0.17763.0
Affected range stops below 10.0.17763.9121, so it looks safe — our inference, not a vendor statement
v < 10.0.20348.544010.0.20348.0
Affected range stops below 10.0.20348.5440, so it looks safe — our inference, not a vendor statement
Affected range stops below 10.0.20348.5499, so it looks safe — our inference, not a vendor statement
v < 10.0.26100.3322210.0.26100.0
Affected range stops below 10.0.26100.33222, so it looks safe — our inference, not a vendor statement
Affected range stops below 10.0.26100.33296, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
References (1)
Vendor AdvisoryPatch
Source: cverecord
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62817SSVC — Action Prioritization
SSVCNo known exploitNot automatableTotal impact
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
- Attack Vector
- ADJACENT_NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- HIGH
- Availability
- HIGH
Vector?
Quick Info
StatusANALYZED
CWE
CWE-787
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