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Microsoft Graphics Component

CVE-2026-21246 — Windows Graphics Component Elevation of Privilege Vulnerability

Important CVSS 7.8 EPSS 0.00417 🔬 Patch diffed 2026-02 archive

Executive Summary

Heap-based buffer overflow in Microsoft Graphics Component allows an authorized attacker to elevate privileges locally.

Overview

7.8
CVSS HIGH
Important
MS Severity
Not Exploited
MS Exploit Status
Exploitation Unlikely
MS Exploit Likelihood
Category Elevation of Privilege
Weakness CWE-122: Heap-based Buffer Overflow
Released Feb 10 2026
Last Updated Feb 10 2026
Publicly Disclosed No
CISA KEV Not Listed
Known Exploits None Known
EPSS Score 0.00417 — 0.34224 percentile
NVD CVSS 7.8 HIGH — matches MSRC

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
ATTACK VECTOR
Local
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
Low
USER INTERACTION
None
SCOPE
Unchanged
CONFIDENTIALITY
High
INTEGRITY
High
AVAILABILITY
High
EXPLOIT CODE MATURITY
Unproven
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 6.8

EPSS Score

0.00417
probability of exploitation in the next 30 days
0.34224 percentile - updated 2026-07-25
View on FIRST.org

Affected Products

21 affected products
Product KB Article Severity Impact Restart Required
Windows 10 Version 1607 for 32-bit Systems 5075999 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1607 for x64-based Systems 5075999 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1809 for 32-bit Systems 5075904 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1809 for x64-based Systems 5075904 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 21H2 for 32-bit Systems 5075912 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 21H2 for ARM64-based Systems 5075912 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 21H2 for x64-based Systems 5075912 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 22H2 for 32-bit Systems 5075912 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 22H2 for ARM64-based Systems 5075912 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 22H2 for x64-based Systems 5075912 (Security Update) Important Elevation of Privilege Yes
Windows 11 Version 23H2 for ARM64-based Systems 5075941 (Security Update) Important Elevation of Privilege Yes
Windows 11 Version 23H2 for x64-based Systems 5075941 (Security Update) Important Elevation of Privilege Yes
Windows 11 Version 24H2 for ARM64-based Systems 5077181 (Security Update) 5077212 (Security Hotpatch Update) Important Elevation of Privilege 5073379 Base: 7.8 Temporal: 6.8 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 10.0.26100.7840 10.0.26100.7781 Yes None Windows 11 Version 24H2 for x64-based Systems 5077212 (Security Hotpatch Update) 5077181 (Security Update) Important Elevation of Privilege 5074109 Base: 7.8 Temporal: 6.8 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 10.0.26100.7781 10.0.26100.7840 Yes None Windows 11 Version 25H2 for ARM64-based Systems 5077181 (Security Update) 5077212 (Security Hotpatch Update) Important Elevation of Privilege 5074109 Base: 7.8 Temporal: 6.8 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 10.0.26200.7840 10.0.26200.7781 Yes None Windows 11 Version 25H2 for x64-based Systems 5077181 (Security Update) 5077212 (Security Hotpatch Update) Important Elevation of Privilege 5074109 Base: 7.8 Temporal: 6.8 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 10.0.26200.7840 10.0.26200.7781 Yes None Windows Server 2012 5075971 (Monthly Rollup) Important Elevation of Privilege Yes
Windows Server 2012 (Server Core installation) 5075971 (Monthly Rollup) Important Elevation of Privilege Yes
Windows Server 2012 R2 5075970 (Monthly Rollup) Important Elevation of Privilege Yes
Windows Server 2012 R2 (Server Core installation) 5075970 (Monthly Rollup) Important Elevation of Privilege Yes
Windows Server 2016 5075999 (Security Update) Important Elevation of Privilege Yes
Windows Server 2016 (Server Core installation) 5075999 (Security Update) Important Elevation of Privilege Yes
Windows Server 2019 5075904 (Security Update) Important Elevation of Privilege Yes
Windows Server 2019 (Server Core installation) 5075904 (Security Update) Important Elevation of Privilege Yes
Windows Server 2022 5075906 (Security Update) 5075943 (Security Hotpatch Update) Important Elevation of Privilege 5073457 Base: 7.8 Temporal: 6.8 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 10.0.20348.4773 10.0.20348.4711 Yes None Windows Server 2022 (Server Core installation) 5075906 (Security Update) 5075943 (Security Hotpatch Update) Important Elevation of Privilege 5073457 Base: 7.8 Temporal: 6.8 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 10.0.20348.4773 10.0.20348.4711 Yes None Windows Server 2022, 23H2 Edition (Server Core installation) 5075897 (Security Update) Important Elevation of Privilege Yes

Patches

7 patches
Article Type Restart
5075999 Security Update Yes
5075904 Security Update Yes
5075912 Security Update Yes
5075941 Security Update Yes
5075971 Monthly Rollup Yes
5075970 Monthly Rollup Yes
5075897 Security Update Yes

Patch Diff

ghidriff · gdi32full.dll (KB5077181)

Patch diff 10.0.26100.7309 -> 10.0.26100.7705

Pre-patch version 10.0.26100.7309 Download
Post-patch version 10.0.26100.7705 Download
Function Address Change Note
API-MS-WIN-CORE-HEAP-L1-1-0.DLL::HeapFree EXTERNAL:0000005e refcount, calling similarity 1.0
wil::details::FeatureImpl<__WilFeatureTraits_Feature_UxPerfImp>::GetCurrentFeatureEnabledState 1800a6720 -> 1800a6330 code, refcount, length, address, called similarity 0.39
wil::last_error_context::last_error_context 18008f448 refcount, calling similarity 1.0
wil::details::FeatureImpl<__WilFeatureTraits_Feature_GatePerf>::GetCachedFeatureEnabledState 1800a4750 code, refcount, length, calling, called similarity 0.4
wil::details::EnabledStateManager::EnsureSubscribedToFeatureConfigurationChangesImpl 18008ffc8 refcount, calling similarity 1.0
memset 180087d48 refcount, calling similarity 1.0
wil::details::FeatureImpl<__WilFeatureTraits_Feature_ImplVal>::GetCachedFeatureEnabledState 1800a4a20 -> 1800a4ac0 refcount, address, calling similarity 0.97
wil::details::ProcessHeapAlloc 180091bec refcount, calling similarity 1.0
_guard_dispatch_icall$thunk$10345483385596137414 1800b5010 -> 1800b4010 refcount, address, calling similarity 0.89
API-MS-WIN-CORE-SYNCH-L1-1-0.DLL::AcquireSRWLockExclusive EXTERNAL:0000003d refcount, calling similarity 1.0
_o__invalid_parameter_noinfo 180087cde refcount, calling similarity 1.0
wil::last_error_context::~last_error_context 18008f70c refcount, calling similarity 1.0
API-MS-WIN-CRT-PRIVATE-L1-1-0.DLL::_o__errno EXTERNAL:0000001c refcount, calling similarity 1.0
API-MS-WIN-CORE-SYNCH-L1-1-0.DLL::ReleaseSRWLockExclusive EXTERNAL:0000003e refcount, calling similarity 1.0
API-MS-WIN-CORE-HEAP-L1-1-0.DLL::GetProcessHeap EXTERNAL:0000005c refcount, calling similarity 1.0
memcpy_s 180094794 refcount, calling similarity 1.0
View full diff report

Known Exploits

Acknowledgments

UlanBird

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