CVE-2026-62877
Windows Win32k Elevation of Privilege Vulnerability
HIGH
7.8
CVSS Score
Published: August 11, 2026 at 05:04 PM UTC
Updated: October 28, 2026 at 08:18 PM UTC
13 products affected across 1 vendorWindows Server 2016Windows Server 2019Windows Server 2012
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Severity
HIGH7.8
Exploit prediction
EPSS 0.3%
SSVC
No known exploit
Description
Stack-based buffer overflow in Windows Win32K allows an authorized attacker to elevate privileges locally.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
v < 10.0.14393.941810.0.14393.0
Affected range stops below 10.0.14393.9418, so it looks safe — our inference, not a vendor statement
v < 10.0.17763.911510.0.17763.0
Affected range stops below 10.0.17763.9115, so it looks safe — our inference, not a vendor statement
Affected range stops below 10.0.17763.9121, so it looks safe — our inference, not a vendor statement
v < 10.0.19044.766310.0.19044.0
Affected range stops below 10.0.19044.7663, so it looks safe — our inference, not a vendor statement
v < 10.0.19045.766310.0.19045.0
Affected range stops below 10.0.19045.7663, so it looks safe — our inference, not a vendor statement
v < 10.0.22631.751710.0.22631.0
Affected range stops below 10.0.22631.7517, so it looks safe — our inference, not a vendor statement
v < 10.0.26100.910610.0.26100.0
Affected range stops below 10.0.26100.9106, so it looks safe — our inference, not a vendor statement
Affected range stops below 10.0.26100.9168, so it looks safe — our inference, not a vendor statement
v < 10.0.26200.910610.0.26200.0
Affected range stops below 10.0.26200.9106, so it looks safe — our inference, not a vendor statement
Affected range stops below 10.0.26200.9168, so it looks safe — our inference, not a vendor statement
v < 10.0.28000.270410.0.28000.0
Affected range stops below 10.0.28000.2704, so it looks safe — our inference, not a vendor statement
Affected range stops below 6.2.9200.26280, so it looks safe — our inference, not a vendor statement
Affected range stops below 6.3.9600.23338, so it looks safe — our inference, not a vendor statement
v < 10.0.14393.941810.0.14393.0
Affected range stops below 10.0.14393.9418, 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-2026-62877SSVC — Action Prioritization
SSVCNo known exploitNot automatableTotal impact
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
7.8HIGHmicrosoft
Vector?
Quick Info
StatusANALYZED
CWE
CWE-121
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