Authentication bypass in Nuvoton NPCM7xx BootBlock
Priority LOW 31CWE-305Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- High
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-287.
Summary
Nuvoton - CWE-305: Authentication Bypass by Primary Weakness An attacker with write access to the SPI-Flash on an NPCM7xx BMC subsystem that uses the Nuvoton BootBlock reference code can modify the u-boot image header on flash parsed by the BootBlock which could lead to arbitrary code execution.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00198 9th percentileScored 2026-11-07
Fix Fixed NPCM7xx (Poleg) BootBlock (Nuvoton): v10.10.19
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Nuvoton | NPCM7xx (Poleg) BootBlock | All versions to before v10.10.19 | v10.10.19 | Patch available | CNA |
- NPCM7xx (Poleg) BootBlock VendorNuvoton Affected All versions to before v10.10.19 Fixed in v10.10.19 Patch available CNA
CPE configurations NVD · 8
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:nuvoton:npcm750r_firmware:*:*:*:*:*:*:*:* | before 10.10.19 | Vulnerable | Nuvoton |
| cpe:2.3:h:nuvoton:npcm750r:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Nuvoton |
| cpe:2.3:o:nuvoton:npcm710r_firmware:*:*:*:*:*:*:*:* | before 10.10.19 | Vulnerable | Nuvoton |
| cpe:2.3:h:nuvoton:npcm710r:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Nuvoton |
| cpe:2.3:o:nuvoton:npcm730r_firmware:*:*:*:*:*:*:*:* | before 10.10.19 | Vulnerable | Nuvoton |
| cpe:2.3:h:nuvoton:npcm730r:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Nuvoton |
| cpe:2.3:o:nuvoton:npcm705r_firmware:*:*:*:*:*:*:*:* | before 10.10.19 | Vulnerable | Nuvoton |
| cpe:2.3:h:nuvoton:npcm705r:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Nuvoton |
- cpe:2.3:o:nuvoton:npcm750r_firmware:*:*:*:*:*:*:*:* Versions before 10.10.19 Vulnerable ·Nuvoton
- cpe:2.3:h:nuvoton:npcm750r:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Nuvoton
- cpe:2.3:o:nuvoton:npcm710r_firmware:*:*:*:*:*:*:*:* Versions before 10.10.19 Vulnerable ·Nuvoton
- cpe:2.3:h:nuvoton:npcm710r:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Nuvoton
- cpe:2.3:o:nuvoton:npcm730r_firmware:*:*:*:*:*:*:*:* Versions before 10.10.19 Vulnerable ·Nuvoton
- cpe:2.3:h:nuvoton:npcm730r:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Nuvoton
- cpe:2.3:o:nuvoton:npcm705r_firmware:*:*:*:*:*:*:*:* Versions before 10.10.19 Vulnerable ·Nuvoton
- cpe:2.3:h:nuvoton:npcm705r:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Nuvoton
Remediation
- Fix · CNA NPCM7xx (Poleg) BootBlock (Nuvoton) Fixed in v10.10.19
Timeline
- 2026-10-02 Threatist record created from CVE-2024-38433
- 2026-10-03 Alias added: GHSA-jx2p-c252-qcmr
References
Sources
- CVE-2024-38433 · CVE Program
- CVE-2024-38433 · NVD
- FIRST EPSS
- GHSA-jx2p-c252-qcmr · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences