Security readout for executives and security teams
Plain-English summary
CVE-2026-24795 is a memory corruption flaw in CloverBootloader before version 5162. The published severity is medium. Because exploitation is local and the cited data does not show active abuse, urgency is mainly for systems that use CloverBootloader in sensitive or hard-to-recover environments.
Executive priority
Address during the next planned bootloader maintenance cycle, faster for high-value endpoints or systems where boot failure creates business disruption. There is no provided evidence of active exploitation, but bootloader changes carry operational risk and should be controlled.
Technical view
The issue is a CWE-787 out-of-bounds write in CloverBootloader’s MdeModulePkg/Universal/RegularExpressionDxe/Oniguruma code, associated with regcomp.C. The CVSS 4.0 score is 5.1. Reported impacts are limited availability effects, with no confidentiality or integrity impact listed in the provided vector.
Likely exposure
Exposure is limited to systems running CloverHackyColor CloverBootloader before 5162. Organizations not using CloverBootloader are not affected based on the provided record. Fleet visibility may be difficult because bootloaders are often outside normal software inventory tools.
Exploitation context
The CVE record marks attack vector as local, with low complexity, no privileges, and no user interaction. CISA KEV is false in the provided bundle, and no cited source states active exploitation. No exploit details are provided in the sources.
Researcher notes
The public record is sparse. Key unknowns include reachable input paths, practical trigger conditions, and whether the flaw can do more than the listed availability impacts. Avoid assuming remote exploitability; the provided CVSS vector is local.
Mitigation direction
- Upgrade CloverBootloader to version 5162 or later where applicable.
- If building from source, review and apply the referenced upstream pull request.
- Confirm vendor guidance before making bootloader changes in production.
- Prioritize backups and recovery plans before modifying boot components.
Validation and detection
- Inventory systems using CloverHackyColor CloverBootloader.
- Check installed CloverBootloader version against 5162.
- Review build provenance for custom or source-built bootloaders.
- Confirm the referenced patch is present in deployed builds.
- Monitor vendor repository and CVE record for updates.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-787: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2026-24795 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.1 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L/S:N/AU:Y/R:U/V:C/RE:L/U:Amber
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L/S:N/AU:Y/R:U/V:C/RE:L/U:Amber——Primary CVE scoreVulnerability scoring details
Base CVSS 4.0 score
5.1MediumVector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L/S:N/AU:Y/R:U/V:C/RE:L/U:Amber
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/CloverHackyColor/CloverBootloader/pull/733CVE reference · patch
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Out-of-bounds Write
Out-of-bounds Write represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.