# CVE-2026-88222

Heap overflow in Microsoft WDAC OLE DB provider enables remote code execution.

- Page: https://www.vulneraibility.com/cve/CVE-2026-88222
- CVSS: 8.8
- Known exploited: not in CISA KEV as of our last sync
- EPSS: 0.61% (percentile 49.6)
- CISA SSVC: exploitation none, automatable no, technical impact total (assessed 2026-11-10)
- Weakness: CWE-122
- Published: 2026-11-10

## Affected versions

- Microsoft Windows 10 Version 1607: affected >= 10.0.14393.0 and < 10.0.14393.9688
- Microsoft Windows 10 Version 1809: affected >= 10.0.17763.0 and < 10.0.17763.9487
- Microsoft Windows 10 Version 21H2: affected >= 10.0.19044.0 and < 10.0.19044.7846
- Microsoft Windows 10 Version 22H2: affected >= 10.0.19045.0 and < 10.0.19045.7846
- Microsoft Windows 11 version 23H2: affected >= 10.0.22631.0 and < 10.0.22631.7711
- Microsoft Windows 11 Version 23H2: affected >= 10.0.22631.0 and < 10.0.22631.7711
- Microsoft Windows 11 Version 24H2: affected >= 10.0.26100.0 and < 10.0.26100.9974
- Microsoft Windows 11 Version 25H2: affected >= 10.0.26200.0 and < 10.0.26200.9974
- Microsoft Windows 11 version 26H1: affected >= 10.0.28000.0 and < 10.0.28000.3501
- Microsoft Windows 11 Version 26H2: affected >= 10.0.26300.0 and < 10.0.26300.9974
- Microsoft Windows Server 2016: affected >= 10.0.14393.0 and < 10.0.14393.9688
- Microsoft Windows Server 2016 (Server Core installation): affected >= 10.0.14393.0 and < 10.0.14393.9688
- Microsoft Windows Server 2019: affected >= 10.0.17763.0 and < 10.0.17763.9487
- Microsoft Windows Server 2019 (Server Core installation): affected >= 10.0.17763.0 and < 10.0.17763.9487
- Microsoft Windows Server 2022: affected >= 10.0.20348.0 and < 10.0.20348.5870
- Microsoft Windows Server 2025: affected >= 10.0.26100.0 and < 10.0.26100.33822
- Microsoft Windows Server 2025 (Server Core installation): affected >= 10.0.26100.0 and < 10.0.26100.33822

A version outside these ranges is not a statement that it is unaffected.

## Impact

Remote code execution over network via heap-based buffer overflow in WDAC OLE DB provider; attacker can run arbitrary code as service account.

## Action

Immediate action required

## Recommendation

Apply Microsoft security update immediately and restrict network access to OLE DB services.

## References

- [patch] https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88222

---
Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.