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CVE-2026-44803

⚠️ high
🔍 Scan for this CVE
Summary

Integer overflow or wraparound in Windows Win32K - GRFX allows an unauthorized attacker to execute code locally.

CVSS Score
7.8
High
EPSS Score
0.4
Exploit Probability
Published Date
2026-06-09
First Seen: 2026-06-10
📊 Relative Risk Intelligence

This CVE is Moderate Risk - more severe than 69.6% of all 329,456 vulnerabilities in our database.

#100,230
Above average severity
Severity Percentile
🎯 CISA SSVC Assessment Updated: Jun 10, 2026
🔍 Exploitation Status
None
No known exploits
⚙️ Automatable
NO
Requires human interaction
💥 Technical Impact
Total
Complete system compromise possible
SSVC data provided by CISA
Last Modified 2026-06-19
Source NVD 🔗
CVSS Vector 3.1 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE IDs (Weakness Types)
CWE-190

📦 Affected Products 17

Vendor Product Status Affected Versions
microsoft excel Affected
v-
microsoft powerpoint Affected
v-
microsoft word Affected
v-
microsoft windows_server_2012 Affected
v-
microsoft windows_server_2012 Affected
vr2
microsoft windows_server_2016 Affected
< 10.0.14393.9234
microsoft windows_server_2019 Affected
< 10.0.17763.8880
microsoft windows_server_2022 Affected
< 10.0.20348.5256
microsoft windows_10_1809 Affected
< 10.0.17763.8880
microsoft windows_10_21h2 Affected
< 10.0.19044.7417
microsoft windows_10_22h2 Affected
< 10.0.19045.7417
microsoft windows_10_1607 Affected
< 10.0.14393.9234
microsoft windows_11_23h2 Affected
< 10.0.22631.7219
microsoft windows_11_24h2 Affected
< 10.0.26100.8655
microsoft windows_server_2025 Affected
< 10.0.26100.32995
microsoft windows_11_25h2 Affected
< 10.0.26200.8655
microsoft windows_11_26h1 Affected
< 10.0.28000.2269

🔗 References 1

https://msrc.microsoft.com/update-guide/vulnerabilit...
Vendor Advisory

🔗 Related CVEs 6

CVE ID Severity CVSS EPSS Summary Published
CVE-2026-44812 ⚠️ high 7.8 0.4 Integer overflow or wraparound in Windows Win32K - GRFX allows an unauthorized attacker to execute code locally. 2026-06-09
CVE-2026-44817 ⚠️ high 7.8 0.4 Integer underflow (wrap or wraparound) in Microsoft Office Excel allows an unauthorized attacker to execute code locally... 2026-06-09
CVE-2026-44818 ⚠️ high 7.0 0.3 Integer underflow (wrap or wraparound) in Microsoft Office Excel allows an unauthorized attacker to execute code locally... 2026-06-09
CVE-2026-44820 ⚠️ high 7.8 0.4 Integer underflow (wrap or wraparound) in Microsoft Office Excel allows an unauthorized attacker to execute code locally... 2026-06-09
CVE-2026-44822 ⚠️ high 8.2 0.5 Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network. 2026-06-09
CVE-2026-44823 ⚠️ high 7.8 0.4 Integer underflow (wrap or wraparound) in Microsoft Office Excel allows an unauthorized attacker to execute code locally... 2026-06-09
These CVEs affect the same products