Insydeh2o
Monthly
Secure Boot bypass in InsydeH2O UEFI firmware allows a locally-privileged attacker to leverage the embedded UEFI Shell to execute shell commands or startup scripts that circumvent Secure Boot integrity enforcement, enabling pre-OS code execution outside the chain of trust. The vulnerability affects InsydeH2O across all tracked versions per the CPE wildcard, with remediation details deferred to OEM-specific advisories referenced in Insyde SA-2026004. No public exploit code or CISA KEV listing has been identified at time of analysis, but the scope change to C:H/I:H/A:H reflects the catastrophic trust boundary violation once exploited.
Arbitrary code execution at the firmware level is possible in Insyde Software's InsydeH2O UEFI implementation due to the absence of verified boot enforcement on certain Firmware Volumes (FVs). A local attacker holding high-privileged OS or physical access can inject unsigned or tampered code into unverified FVs, achieving persistent below-OS execution that survives operating system reinstalls and standard endpoint security controls. No public exploit has been identified at time of analysis, and this vulnerability has not been listed in the CISA Known Exploited Vulnerabilities catalog.
SMM buffer overflow in InsydeH2O's IHISI command handler for FMTS command 0x32 allows a physically-present, highly-privileged attacker to trigger out-of-bounds writes in System Management Mode firmware. The vulnerable function FMTSWriteUseIntelLib performs read and write operations without validating buffer sizes, enabling potential firmware-level memory corruption in Ring -2 execution context. No active exploitation has been identified and no public exploit exists; the combination of physical access, high privilege, high attack complexity, and required user interaction makes real-world risk extremely low despite the sensitive SMM execution environment.
CVE-2024-55567 is an improper input validation vulnerability in the UsbCoreDxe module of Insyde InsydeH2O firmware that allows authenticated local attackers with high privileges to bypass SMM (System Management Mode) protections and execute arbitrary code at the highest firmware privilege level. This affects multiple kernel versions (5.4, 5.5, 5.6, 5.7) across numerous OEM BIOS implementations, enabling complete system compromise including kernel-level code execution and memory access. While CVSS rates this as 7.5 (high), real-world exploitation requires local access and administrative/BIOS-level privileges, though no public POC or active KEV designation has been confirmed.
An issue was discovered in Insyde InsydeH2O kernel 5.2 before version 05.29.50, kernel 5.3 before version 05.38.50, kernel 5.4 before version 05.46.50, kernel 5.5 before version 05.54.50, kernel 5.6. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An issue was discovered in Insyde InsydeH2O kernel 5.2 before version 05.29.50, kernel 5.3 before version 05.38.50, kernel 5.4 before version 05.46.50, kernel 5.5 before version 05.54.50, kernel 5.6. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An issue was discovered in Insyde InsydeH2O kernel 5.2 before version 05.29.50, kernel 5.3 before version 05.38.50, kernel 5.4 before version 05.46.50, kernel 5.5 before version 05.54.50, kernel 5.6. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
A memory corruption vulnerability in HddPassword in Insyde InsydeH2O kernel 5.2 before 05.29.09, kernel 5.3 before 05.38.09, kernel 5.4 before 05.46.09, kernel 5.5 before 05.54.09, and kernel 5.6. Rated high severity (CVSS 7.4). No vendor patch available.
A LogoFAIL issue was discovered in BmpDecoderDxe in Insyde InsydeH2O with kernel 5.2 before 05.28.47, 5.3 before 05.37.47, 5.4 before 05.45.47, 5.5 before 05.53.47, and 5.6 before 05.60.47 for. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. Public exploit code available and no vendor patch available.
An SMM memory corruption vulnerability in the SMM driver (SMRAM write) in CsmInt10HookSmm in Insyde InsydeH2O with kernel 5.0 through 5.5 allows attackers to send arbitrary data to SMM which could. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. No vendor patch available.
An issue was discovered in IhisiServicesSmm in Insyde InsydeH2O with kernel 5.0 through 5.5. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. No vendor patch available.
A stack buffer overflow vulnerability discovered in AsfSecureBootDxe in Insyde InsydeH2O with kernel 5.0 through 5.5 allows attackers to run arbitrary code execution during the DXE phase. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An issue was discovered in TrEEConfigDriver in Insyde InsydeH2O with kernel 5.0 through 5.5. Rated medium severity (CVSS 5.3), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
An issue was discovered in SystemFirmwareManagementRuntimeDxe in Insyde InsydeH2O with kernel 5.0 through 5.5. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. No vendor patch available.
An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. No vendor patch available.
An issue was discovered in SysPasswordDxe in Insyde InsydeH2O with kernel 5.0 through 5.5. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. No vendor patch available.
An issue was discovered in Insyde InsydeH2O with kernel 5.2 through 5.5. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. Public exploit code available and no vendor patch available.
An issue was discovered in IhisiSmm in Insyde InsydeH2O with kernel 5.0 through 5.5. Rated high severity (CVSS 8.8), this vulnerability is low attack complexity. No vendor patch available.
An issue was discovered in IhisiSmm in Insyde InsydeH2O with kernel 5.0 through 5.5. Rated high severity (CVSS 8.4), this vulnerability is low attack complexity. No vendor patch available.
An issue was discovered in ChipsetSvcSmm in Insyde InsydeH2O with kernel 5.0 through 5.5. Rated high severity (CVSS 8.8), this vulnerability is low attack complexity. Public exploit code available and no vendor patch available.
An issue was discovered in IhisiSmm in Insyde InsydeH2O with kernel 5.0 through 5.5. Rated high severity (CVSS 8.8), this vulnerability is low attack complexity. No vendor patch available.
DMA transactions which are targeted at input buffers used for the StorageSecurityCommandDxe software SMI handler could cause SMRAM corruption through a TOCTOU attack. Rated high severity (CVSS 7.8). No vendor patch available.
An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. Rated high severity (CVSS 8.2), this vulnerability is low attack complexity. Public exploit code available and no vendor patch available.
An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. Rated high severity (CVSS 8.2), this vulnerability is low attack complexity. No vendor patch available.
An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. Rated high severity (CVSS 8.2), this vulnerability is low attack complexity. Public exploit code available and no vendor patch available.
An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. Rated medium severity (CVSS 6.0), this vulnerability is low attack complexity. Public exploit code available and no vendor patch available.
An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. Rated high severity (CVSS 8.2), this vulnerability is low attack complexity. Public exploit code available and no vendor patch available.
An issue SMM memory leak vulnerability in SMM driver (SMRAM was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. Rated medium severity (CVSS 6.0), this vulnerability is low attack complexity. Public exploit code available and no vendor patch available.
An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. Rated high severity (CVSS 8.2), this vulnerability is low attack complexity. Public exploit code available and no vendor patch available.
A vulnerability exists in SMM (System Management Mode) branch that registers a SWSMI handler that does not sufficiently check or validate the allocated buffer pointer(QWORD values for CommBuffer). Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. No vendor patch available.
Secure Boot bypass in InsydeH2O UEFI firmware allows a locally-privileged attacker to leverage the embedded UEFI Shell to execute shell commands or startup scripts that circumvent Secure Boot integrity enforcement, enabling pre-OS code execution outside the chain of trust. The vulnerability affects InsydeH2O across all tracked versions per the CPE wildcard, with remediation details deferred to OEM-specific advisories referenced in Insyde SA-2026004. No public exploit code or CISA KEV listing has been identified at time of analysis, but the scope change to C:H/I:H/A:H reflects the catastrophic trust boundary violation once exploited.
Arbitrary code execution at the firmware level is possible in Insyde Software's InsydeH2O UEFI implementation due to the absence of verified boot enforcement on certain Firmware Volumes (FVs). A local attacker holding high-privileged OS or physical access can inject unsigned or tampered code into unverified FVs, achieving persistent below-OS execution that survives operating system reinstalls and standard endpoint security controls. No public exploit has been identified at time of analysis, and this vulnerability has not been listed in the CISA Known Exploited Vulnerabilities catalog.
SMM buffer overflow in InsydeH2O's IHISI command handler for FMTS command 0x32 allows a physically-present, highly-privileged attacker to trigger out-of-bounds writes in System Management Mode firmware. The vulnerable function FMTSWriteUseIntelLib performs read and write operations without validating buffer sizes, enabling potential firmware-level memory corruption in Ring -2 execution context. No active exploitation has been identified and no public exploit exists; the combination of physical access, high privilege, high attack complexity, and required user interaction makes real-world risk extremely low despite the sensitive SMM execution environment.
CVE-2024-55567 is an improper input validation vulnerability in the UsbCoreDxe module of Insyde InsydeH2O firmware that allows authenticated local attackers with high privileges to bypass SMM (System Management Mode) protections and execute arbitrary code at the highest firmware privilege level. This affects multiple kernel versions (5.4, 5.5, 5.6, 5.7) across numerous OEM BIOS implementations, enabling complete system compromise including kernel-level code execution and memory access. While CVSS rates this as 7.5 (high), real-world exploitation requires local access and administrative/BIOS-level privileges, though no public POC or active KEV designation has been confirmed.
An issue was discovered in Insyde InsydeH2O kernel 5.2 before version 05.29.50, kernel 5.3 before version 05.38.50, kernel 5.4 before version 05.46.50, kernel 5.5 before version 05.54.50, kernel 5.6. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An issue was discovered in Insyde InsydeH2O kernel 5.2 before version 05.29.50, kernel 5.3 before version 05.38.50, kernel 5.4 before version 05.46.50, kernel 5.5 before version 05.54.50, kernel 5.6. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An issue was discovered in Insyde InsydeH2O kernel 5.2 before version 05.29.50, kernel 5.3 before version 05.38.50, kernel 5.4 before version 05.46.50, kernel 5.5 before version 05.54.50, kernel 5.6. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
A memory corruption vulnerability in HddPassword in Insyde InsydeH2O kernel 5.2 before 05.29.09, kernel 5.3 before 05.38.09, kernel 5.4 before 05.46.09, kernel 5.5 before 05.54.09, and kernel 5.6. Rated high severity (CVSS 7.4). No vendor patch available.
A LogoFAIL issue was discovered in BmpDecoderDxe in Insyde InsydeH2O with kernel 5.2 before 05.28.47, 5.3 before 05.37.47, 5.4 before 05.45.47, 5.5 before 05.53.47, and 5.6 before 05.60.47 for. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. Public exploit code available and no vendor patch available.
An SMM memory corruption vulnerability in the SMM driver (SMRAM write) in CsmInt10HookSmm in Insyde InsydeH2O with kernel 5.0 through 5.5 allows attackers to send arbitrary data to SMM which could. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. No vendor patch available.
An issue was discovered in IhisiServicesSmm in Insyde InsydeH2O with kernel 5.0 through 5.5. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. No vendor patch available.
A stack buffer overflow vulnerability discovered in AsfSecureBootDxe in Insyde InsydeH2O with kernel 5.0 through 5.5 allows attackers to run arbitrary code execution during the DXE phase. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An issue was discovered in TrEEConfigDriver in Insyde InsydeH2O with kernel 5.0 through 5.5. Rated medium severity (CVSS 5.3), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
An issue was discovered in SystemFirmwareManagementRuntimeDxe in Insyde InsydeH2O with kernel 5.0 through 5.5. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. No vendor patch available.
An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. No vendor patch available.
An issue was discovered in SysPasswordDxe in Insyde InsydeH2O with kernel 5.0 through 5.5. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. No vendor patch available.
An issue was discovered in Insyde InsydeH2O with kernel 5.2 through 5.5. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. Public exploit code available and no vendor patch available.
An issue was discovered in IhisiSmm in Insyde InsydeH2O with kernel 5.0 through 5.5. Rated high severity (CVSS 8.8), this vulnerability is low attack complexity. No vendor patch available.
An issue was discovered in IhisiSmm in Insyde InsydeH2O with kernel 5.0 through 5.5. Rated high severity (CVSS 8.4), this vulnerability is low attack complexity. No vendor patch available.
An issue was discovered in ChipsetSvcSmm in Insyde InsydeH2O with kernel 5.0 through 5.5. Rated high severity (CVSS 8.8), this vulnerability is low attack complexity. Public exploit code available and no vendor patch available.
An issue was discovered in IhisiSmm in Insyde InsydeH2O with kernel 5.0 through 5.5. Rated high severity (CVSS 8.8), this vulnerability is low attack complexity. No vendor patch available.
DMA transactions which are targeted at input buffers used for the StorageSecurityCommandDxe software SMI handler could cause SMRAM corruption through a TOCTOU attack. Rated high severity (CVSS 7.8). No vendor patch available.
An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. Rated high severity (CVSS 8.2), this vulnerability is low attack complexity. Public exploit code available and no vendor patch available.
An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. Rated high severity (CVSS 8.2), this vulnerability is low attack complexity. No vendor patch available.
An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. Rated high severity (CVSS 8.2), this vulnerability is low attack complexity. Public exploit code available and no vendor patch available.
An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. Rated medium severity (CVSS 6.0), this vulnerability is low attack complexity. Public exploit code available and no vendor patch available.
An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. Rated high severity (CVSS 8.2), this vulnerability is low attack complexity. Public exploit code available and no vendor patch available.
An issue SMM memory leak vulnerability in SMM driver (SMRAM was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. Rated medium severity (CVSS 6.0), this vulnerability is low attack complexity. Public exploit code available and no vendor patch available.
An issue was discovered in Insyde InsydeH2O with kernel 5.0 through 5.5. Rated high severity (CVSS 8.2), this vulnerability is low attack complexity. Public exploit code available and no vendor patch available.
A vulnerability exists in SMM (System Management Mode) branch that registers a SWSMI handler that does not sufficiently check or validate the allocated buffer pointer(QWORD values for CommBuffer). Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. No vendor patch available.