Intel Slim Bootloader: Out-of-bounds write in UEFI firmware allows privilege escalation
Summary
An out-of-bounds write in the UEFI firmware of Intel's Slim Bootloader may allow an attacker to escalate privileges within Ring 0 on affected systems. According to the CVE record, the attack requires physical access and an unauthenticated attacker with low complexity and no user interaction. The impact is described as high on confidentiality, integrity and availability. The Intel advisory could not be verified, so the details and CVSS score are not yet confirmed.
Affected
- Intel Slim Bootloader (affected versions unknown; the Intel advisory INTEL-SA-01526 lists affected CPU IDs, which could not be verified)
- Devices with OEM firmware derived from Slim Bootloader, if they use affected CPUs (unknown)
Fixed in
Unknown. Intel states that firmware updates are released, but no fixed version or commit hash could be confirmed.
Workaround
Unknown.
- Until a fix is confirmed, limit physical access to affected machines (generic guidance, not from a source)
Exploitation
- No known exploitation in the wild at time of writing.
- No public proof of concept found.
- No CISA KEV entry found.
- The CVE was published on 2026-11-10 and the information is limited.
Our recommendation
- Check the Intel advisory INTEL-SA-01526 directly and confirm affected CPU IDs and fixed firmware versions.
- Identify devices with affected Intel processors, especially shared, unattended or kiosk machines.
- Obtain firmware updates from your hardware or OEM vendor and install them.
- Restrict physical access to affected devices in the meantime.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Intel Advisory INTEL-SA-01526 intel.com
- Intel Slim Bootloader product page firmware.intel.com
- Intel Security Center www.intel.com
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 10 Nov 2026, 19:25.
Original description (NVD)
Out-of-bounds write in the UEFI firmware for the Intel(R) Slim Bootloader within Ring 0: Bare Metal OS may allow an escalation of privilege. Startup code and smm adversary with an unauthenticated user combined with a low complexity attack may enable escalation of privilege. This result may potentially occur via physical access when attack requirements are not present without special internal knowledge and requires no user interaction. The potential vulnerability may impact the confidentiality (high), integrity (high) and availability (high) of the vulnerable system, resulting in subsequent system confidentiality (high), integrity (high) and availability (high) impacts.
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
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