Security readout for executives and security teams
Plain-English summary
CVE-2026-24796 affects CloverBootloader before version 5162. It is an out-of-bounds read in a regular expression parsing component. The main business risk is bootloader instability or denial of service on systems that use vulnerable CloverBootloader builds. Public sources do not indicate active exploitation.
Executive priority
Treat this as a targeted infrastructure hygiene issue, not an internet-wide emergency. Prioritize affected bootloader deployments, especially shared, lab, kiosk, or physically exposed systems. Patch planning is warranted because bootloader issues can disrupt system availability and recovery operations.
Technical view
The CVE describes CWE-125 in CloverHackyColor CloverBootloader, specifically MdeModulePkg/Universal/RegularExpressionDxe/Oniguruma regparse.C. CVSS 4.0 score is 6.9, with local attack vector, low complexity, no privileges, no user interaction, high vulnerable-system availability impact, and low subsequent-system availability impact.
Likely exposure
Exposure is limited to environments using CloverHackyColor CloverBootloader versions before 5162. Systems not using CloverBootloader are not indicated as affected by the provided sources. Because the attack vector is local, risk depends on who can access or influence the boot environment.
Exploitation context
The CVE is not listed as KEV in the provided bundle, and no cited source states active exploitation. The CVSS vector indicates local exploitation with no privileges or user interaction, suggesting concern for attackers with local or boot-path access rather than routine remote scanning.
Researcher notes
Public detail is limited to the CVE description, CVSS vector, and a patch pull request. The sources identify the vulnerable file path and affected versions but do not provide exploit evidence, broad impact analysis, or detailed vendor remediation instructions beyond the patch reference.
Mitigation direction
- Upgrade CloverBootloader to version 5162 or later if available for your environment.
- Review the vendor patch reference, GitHub pull request 732.
- Prioritize systems where untrusted users can access the boot environment.
- Monitor CloverBootloader advisories for release notes or additional mitigation guidance.
Validation and detection
- Inventory systems using CloverHackyColor CloverBootloader.
- Identify CloverBootloader builds older than 5162.
- Check whether affected RegularExpressionDxe/Oniguruma code is included in deployed builds.
- Confirm remediation by verifying installed CloverBootloader version metadata.
- Document systems where bootloader updates require maintenance windows.
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-125: 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-2026-24796 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
- 6.9 (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:H/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:H/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
6.9MediumVector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/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/732CVE 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 Read
Out-of-bounds Read represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.