# CVE-2026-35500: Intel Slim Bootloader stack buffer overflow in Ring 0

Source: https://junglewise.ai/threats/cve-2026-35500-stack-based-buffer-overflow-in-the-uefi-firmware-for-the-intel-r  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-10. Updated: 2026-11-10  
License: CC BY 4.0 with a link back

CVE-2026-35500 · Severity: info · Published 2026-11-10

Intel Slim Bootloader is firmware that initializes computer hardware during startup. A stack-based buffer overflow in the bootloader allows an attacker with physical access to escalate privileges and fully compromise system security, potentially gaining complete control of the machine including data theft, corruption, and system shutdown.

Technologies: [Intel Slim Bootloader](https://junglewise.ai/threats/technologies/slim-bootloader). Vendors: [Intel](https://junglewise.ai/threats/vendors/intel).

## Quick answers

**Is CVE-2026-35500 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-35500 being exploited in the wild.

**How severe is CVE-2026-35500?** Informational severity, published 10 November 2026.

**Which products and versions are affected?** Intel Slim Bootloader.

**Is there a fix for CVE-2026-35500?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-35500 attacked?** It is attacked with physical access.

**Am I affected by CVE-2026-35500?** Check whether you run Intel Slim Bootloader. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

Stack-based buffer overflow in UEFI firmware startup code and SMM within Ring 0 Bare Metal OS. Attack requires physical access and no authentication; low complexity. Successful exploitation grants Ring 0 execution enabling full compromise of confidentiality, integrity, and availability.

## Affected products

- Intel Slim Bootloader

## Timeline

- 2026-11-10: advisory

## References

- [https://intel.com/content/www/us/en/security-center/advisory/intel-sa-01526.html](https://intel.com/content/www/us/en/security-center/advisory/intel-sa-01526.html)

## Related threats

- [Intel Slim Bootloader pointer dereference in FirmwareWakingVector](https://junglewise.ai/threats/cve-2026-50175-untrusted-pointer-dereference-in-the-firmwarewakingvector-for-the)
- [Intel Slim Bootloader Ext2 parser incorrect comparison](https://junglewise.ai/threats/cve-2026-44624-incorrect-comparison-in-the-ext2-parser-for-the-intel-r-slim)
- [Intel Slim Bootloader out-of-bounds write privilege escalation](https://junglewise.ai/threats/cve-2026-41224-out-of-bounds-write-in-the-uefi-firmware-for-the-intel-r-slim)
- [Intel Slim Bootloader integer overflow in UEFI firmware](https://junglewise.ai/threats/cve-2026-41221-integer-overflow-in-the-uefi-firmware-for-the-intel-r-slim)
- [Intel Slim Bootloader out-of-bounds read in AuthenticateComponent](https://junglewise.ai/threats/cve-2026-28746-out-of-bounds-read-in-the-authenticatecomponent-for-the-intel-r)