CVE-2026-54333

Published Sep 14, 2026

Last updated 21 days ago

CVSS critical 9.8
Firmware

Overview

Description
UEFI Firmware Parser parses BIOS, Intel ME, and UEFI firmware structures including volumes, file systems, and files. Prior to 1.14, MakeTable() in uefi_firmware/compression/Tiano/Decompress.c does not validate that bit-length values read from a crafted Tiano or EFI compressed firmware bitstream remain within the expected range from 0 through 16. The normal CompressedSection.process() to efi_compressor.TianoDecompress() to TianoDecompress() to ReadPTLen() to MakeTable() parsing path can consequently write beyond the stack-allocated Count[17] array and related decode tables. The resulting stack corruption deterministically crashes the parsing process and may permit code execution depending on build and runtime details. This issue is fixed in version 1.14.
Source
security-advisories@github.com
NVD status
Deferred

Risk scores

CVSS 3.1

Type
Secondary
Base score
9.8
Impact score
5.9
Exploitability score
3.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Severity
CRITICAL

Weaknesses

security-advisories@github.com
CWE-787

Social media

Hype score
Not currently trending

Related CVEs

  1. OpenEye Apex Network Video Recorder (NVR) firmware 3.2.9.376 contains an OS command injection vulnerability in recbackup. An authenticated administrator can supply crafted backup-area configuration input that is passed to a shell command, allowing commands to execute with the privileges of the nvr user. The underlying design has been present since at least firmware 2.2.3.4. This vulnerability is resolved in OpenEye Apex version 3.4.3.•CVE-2026-94367
  2. OpenEye Apex Network Video Recorder (NVR) firmware 3.2.9.376 trusts an X-Forwarded-For header supplied by an arbitrary client when determining the request source address. An unauthenticated remote attacker can spoof a loopback address to bypass local-connection-only security controls exposed on the affected non-TLS web interfaces and disclose configuration information. The underlying design has been present since at least firmware 2.2.3.4. Upgrade to version 3.5.4.•CVE-2026-92929
  3. A high-privileged remote attacker can exploit a command injection vulnerability in the /api/datastorage/data endpoint by sending a crafted GET request with admin credentials allowing execution of commands with root privileges on the device.•CVE-2026-27563
  4. A high-privileged remote attacker can exploit a command injection vulnerability in the /api/datastorage/data endpoint by sending a PUT request with admin credentials allowing execution of commands with root privileges on the device.•CVE-2026-27564
  5. An unauthenticated remote attacker can upload a malicious IODD file that places and executes a shell script with root privileges. The shell script remains active even after a reboot.•CVE-2026-27565

References

Sources include official advisories and independent security research.