CVE-2026-78451

MEDIUM
Published Sep 8, 2026 Modified Sep 11, 2026 CWE-822

Description

Untrusted pointer dereference in Microsoft Windows SCSI Class System File allows an unauthorized attacker to elevate privileges with a physical attack.

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CVSS v3.1 Score

6.8
MEDIUM
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS — Exploit Prediction

0.0044
Probability of exploitation
0.37%
Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-822 CWE-822

Affected Products

Vendor Product
microsoft windows_10_1809
microsoft windows_10_1809
microsoft windows_10_21h2
microsoft windows_10_21h2
microsoft windows_10_21h2
microsoft windows_10_22h2
microsoft windows_10_22h2
microsoft windows_10_22h2
microsoft windows_11_23h2
microsoft windows_11_23h2
microsoft windows_11_24h2
microsoft windows_11_24h2
microsoft windows_11_25h2
microsoft windows_11_25h2
microsoft windows_11_26h1
microsoft windows_11_26h1
microsoft windows_server_2019
microsoft windows_server_2022
microsoft windows_server_2025

References

Frequently Asked Questions

What is CVE-2026-78451? +
Untrusted pointer dereference in Microsoft Windows SCSI Class System File allows an unauthorized attacker to elevate privileges with a physical attack. It has a CVSS v3.1 base score of 6.8 (MEDIUM).
How severe is CVE-2026-78451? +
CVE-2026-78451 has a CVSS v3.1 score of 6.8 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0044, placing it in the 0th percentile for exploitation probability.
What products are affected by CVE-2026-78451? +
CVE-2026-78451 affects products from microsoft, specifically: windows_10_1809, windows_10_21h2, windows_10_22h2, windows_11_23h2, windows_11_24h2, windows_11_25h2, windows_11_26h1, windows_server_2019, windows_server_2022, windows_server_2025. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2026-78451? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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