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Vulnerability Assessment

Weakness
CWE
CWE-122
ASVS 5.0
V15 - Secure Coding and Architecture Heap buffer bounds checking
MITRE ATT&CK

1 technique across 1 tactic: Execution

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

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This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
Patch available 0.4% exploitation probability (EPSS)

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AnalysisAIv1 – Jul 14, 2026

Local code execution in Windows GDI+ (the Graphics Device Interface Plus rendering component) affects a broad range of Microsoft Windows client and server releases from Windows 10 1607 through Windows 11 26H1 and Windows Server 2012 through Server 2025. An attacker who convinces a user to open or preview a specially crafted image or document triggers a heap-based buffer overflow (CWE-122) during graphics parsing, yielding arbitrary code execution in the context of the current user. The CVSS 3.1 base score is 7.8 (AV:L/AC:L/PR:N/UI:R); there is no public exploit identified at time of analysis and it is not listed in CISA KEV, but GDI+ image-parsing flaws are historically attractive to attackers.

Affected VersionsENISA

Windows Server 2012 6.2.9200.0 <6.2.9200.26226
Windows 10 Version 22H2 10.0.19045.0 <10.0.19045.7548
Windows Server 2012 R2 (Server Core installation) 6.3.9600.0 <6.3.9600.23291
Windows Server 2025 10.0.26100.0 <10.0.26100.33158
Windows Server 2012 (Server Core installation) 6.2.9200.0 <6.2.9200.26226
Windows Server 2016 10.0.14393.0 <10.0.14393.9339
Windows Server 2025 (Server Core installation) 10.0.26100.0 <10.0.26100.33158
Windows Server 2019 10.0.17763.0 <10.0.17763.9020
Windows 10 Version 1809 10.0.17763.0 <10.0.17763.9020
Windows 10 Version 1607 10.0.14393.0 <10.0.14393.9339
Windows Server 2019 (Server Core installation) 10.0.17763.0 <10.0.17763.9020
Windows Server 2016 (Server Core installation) 10.0.14393.0 <10.0.14393.9339
Windows Server 2022 10.0.20348.0 <10.0.20348.5386
Windows 11 Version 25H2 10.0.26200.0 <10.0.26200.8875
Windows Server 2012 R2 6.3.9600.0 <6.3.9600.23291
Windows 11 Version 24H2 10.0.26100.0 <10.0.26100.8875
Windows 10 Version 21H2 10.0.19044.0 <10.0.19044.7548
Windows 11 version 26H1 10.0.28000.0 <10.0.28000.2269

Affected Packages

microsoft windows_10_version_1607_10_0_14393_9339 fix: Windows 10 Version 1607 for 32-bit Systems 10.0.14393.9339, Windows 10 Version 1607 for x64-based Systems 10.0.14393.9339
microsoft windows_10_version_1809_10_0_17763_9020 fix: Windows 10 Version 1809 for 32-bit Systems 10.0.17763.9020, Windows 10 Version 1809 for x64-based Systems 10.0.17763.9020
microsoft windows_10_version_21h2_10_0_19044_7548 fix: Windows 10 Version 21H2 for 32-bit Systems 10.0.19044.7548, Windows 10 Version 21H2 for ARM64-based Systems 10.0.19044.7548, Windows 10 Version 21H2 for x64-based Systems 10.0.19044.7548
microsoft windows_10_version_22h2_10_0_19045_7548 fix: Windows 10 Version 22H2 for 32-bit Systems 10.0.19045.7548, Windows 10 Version 22H2 for ARM64-based Systems 10.0.19045.7548, Windows 10 Version 22H2 for x64-based Systems 10.0.19045.7548
microsoft windows_11_version_24h2_10_0_26100_8875 fix: Windows 11 Version 24H2 for ARM64-based Systems 10.0.26100.8875, Windows 11 Version 24H2 for x64-based Systems 10.0.26100.8875
microsoft windows_11_version_25h2_10_0_26200_8875 fix: Windows 11 Version 25H2 for ARM64-based Systems 10.0.26200.8875, Windows 11 Version 25H2 for x64-based Systems 10.0.26200.8875
microsoft windows_11_version_26h1_10_0_28000_2269 fix: Windows 11 version 26H1 for x64-based Systems 10.0.28000.2269
microsoft windows_11_version_26h1_10_0_28000_2525 fix: Windows 11 Version 26H1 for ARM64-based Systems 10.0.28000.2525
microsoft windows_server_2012_6_2_9200_26226 fix: Windows Server 2012 6.2.9200.26226, Windows Server 2012 (Server Core installation) 6.2.9200.26226
microsoft windows_server_2012_r2_6_3_9600_23291 fix: Windows Server 2012 R2 6.3.9600.23291, Windows Server 2012 R2 (Server Core installation) 6.3.9600.23291
microsoft windows_server_2016_10_0_14393_9339 fix: Windows Server 2016 10.0.14393.9339, Windows Server 2016 (Server Core installation) 10.0.14393.9339
microsoft windows_server_2019_10_0_17763_9020 fix: Windows Server 2019 10.0.17763.9020, Windows Server 2019 (Server Core installation) 10.0.17763.9020
microsoft windows_server_2022_10_0_20348_5386 fix: Windows Server 2022 10.0.20348.5386
microsoft windows_server_2025_10_0_26100_33158 fix: Windows Server 2025 10.0.26100.33158, Windows Server 2025 (Server Core installation) 10.0.26100.33158
euvd windows_10_version_1607 fix: 10.0.14393.9339
euvd windows_10_version_1809 fix: 10.0.17763.9020
euvd windows_10_version_21h2 fix: 10.0.19044.7548
euvd windows_10_version_22h2 fix: 10.0.19045.7548
euvd windows_11_version_24h2 fix: 10.0.26100.8875
euvd windows_11_version_25h2 fix: 10.0.26200.8875
euvd windows_11_version_26h1 fix: 10.0.28000.2269
euvd windows_server_2012 fix: 6.2.9200.26226
euvd windows_server_2012_r2 fix: 6.3.9600.23291
euvd windows_server_2012_r2_server_core_installation fix: 6.3.9600.23291
euvd windows_server_2012_server_core_installation fix: 6.2.9200.26226
euvd windows_server_2016 fix: 10.0.14393.9339
euvd windows_server_2016_server_core_installation fix: 10.0.14393.9339
euvd windows_server_2019 fix: 10.0.17763.9020
euvd windows_server_2019_server_core_installation fix: 10.0.17763.9020
euvd windows_server_2022 fix: 10.0.20348.5386
euvd windows_server_2025 fix: 10.0.26100.33158
euvd windows_server_2025_server_core_installation fix: 10.0.26100.33158

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 32 packages in microsoft, euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

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  • Exploit and PoC references, threat intelligence from 22 sources
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Severity by source

Vendor (microsoft) PRIMARY 7.8 HIGH
AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CIRCL (temporal) 6.8 MEDIUM

Primary rating from Vendor (microsoft).

CVSS VectorVendor: microsoft

Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

DescriptionCVE.org

Heap-based buffer overflow in Windows GDI+ allows an unauthorized attacker to execute code locally.

Executive ViewAI

Why It Matters

CVE-2026-49796 is a local code execution vulnerability in Windows GDI+ affecting Windows 10, 11, and Server 2012-2025 across the organization. An attacker with local access can trigger the flaw through a specially crafted image file, potentially compromising user endpoints and servers; while the broad range of affected Windows versions creates significant organizational exposure, exploitation requires user interaction and local presence.

Recommended Action

Within 24 hours, identify and catalog all systems running affected Windows versions (Windows 10 1607-current, Windows 11 up to 26H1, and Server 2012-2025) and issue user guidance against opening images or documents from untrusted sources. Within 7 days, obtain and begin staged deployment of the vendor-released patch to high-priority systems, prioritizing servers, then client endpoints in risk-based waves. Within 30 days, complete patch deployment across all affected systems, validate remediation through patch-compliance scanning, and update vulnerability tracking records.

Business Impact: High
Compensating Controls

Apply vendor patch.

Threat Intelligence Overview

EPSS Score
0.4%
Top 68% exploitable
Threat Intel
1
1 sources
Vendor Action
See Below
Required. The vulnerability documented by this CVE requires customer action to resolve.
Vendor Status
Publicly Disclosed:No
Exploited:No
Latest Software Release:Exploitation Less Likely
Data Quality
6 sources
Confidence: High
EUVD 🇯🇵JVN NVD CVE.org EPSS Vulnrichment NEWS MSRC VulDB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity HIGH
CISA KEV No
Public POC No
EPSS 0.4%
Patch available Yes
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision
Scheduled
Exploitation
None
System Exposure· derived
Small
Automatable
No
Human Impact
High
Technical Impact
Total

Priority Score

39
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +39
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Buffer Overflow HIGH

A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.

Heap Overflow HIGH

A heap overflow occurs when a program writes data beyond the bounds of a buffer allocated in the heap memory region.

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Same weakness CWE-122 – Heap-based Buffer Overflow

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References

Advisories & patches
PATCH https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-49796 ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2026-49796 ADVISORY https://vuldb.com/vuln/378474

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