CVE-2026-9805
FMTSWriteUseIntelLib: FMTS SMM IHISI Buffer Overflow
Description
SMM IHISI command handler, FMTSWriteUseIntelLib, for FMTS command 0x32, read and write data without checking buffer size and could cause buffer overflow.
INFO
Published Date :
Aug. 26, 2026, 5:18 a.m.
Last Modified :
Aug. 31, 2026, 7:27 p.m.
Remotely Exploit :
No
Source :
8338d8cb-57f7-4252-abc0-96fd13e98d21
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | LOW | 8338d8cb-57f7-4252-abc0-96fd13e98d21 | ||||
| CVSS 3.1 | LOW | MITRE-CVE |
Solution
- Apply vendor patches for SMM IHISI command handler.
- Update the SMM IHISI command handler firmware.
- Validate buffer sizes before reading or writing data.
- Implement robust bounds checking in FMTSWriteUseIntelLib.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-9805.
| URL | Resource |
|---|---|
| https://www.insyde.com/security-pledge/sa-2026006/ |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-9805 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-9805
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-9805 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-9805 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Aug. 26, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-9805', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-08-26T15:29:23.290859Z'} -
New CVE Received by 8338d8cb-57f7-4252-abc0-96fd13e98d21
Aug. 26, 2026
Action Type Old Value New Value Added Description SMM IHISI command handler, FMTSWriteUseIntelLib, for FMTS command 0x32, read and write data without checking buffer size and could cause buffer overflow. Added CVSS V3.1 AV:P/AC:H/PR:H/UI:R/S:U/C:N/I:L/A:L Added CWE CWE-787 Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/9xxx/CVE-2026-9805.json">CVE-2026-9805</a> Added Reference https://www.insyde.com/security-pledge/sa-2026006/