CVE-2025-4277

HIGH
Published Aug 13, 2025 Modified Apr 15, 2026 CWE-20

Description

Tcg2Smm has a vulnerability which can be used to write arbitrary memory inside SMRAM and execute arbitrary code at SMM level.

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CVSS v3.1 Score

7.5
HIGH
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

Weakness Type (CWE)

CWE-20 Improper Input Validation

References

Frequently Asked Questions

What is CVE-2025-4277? +
Tcg2Smm has a vulnerability which can be used to write arbitrary memory inside SMRAM and execute arbitrary code at SMM level. It has a CVSS v3.1 base score of 7.5 (HIGH).
How severe is CVE-2025-4277? +
CVE-2025-4277 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.
How do I check if I'm vulnerable to CVE-2025-4277? +
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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