# CVE-2026-119870: Windows SMB Client privilege escalation via untrusted pointer dereference

Source: https://junglewise.ai/threats/cve-2026-119870-untrusted-pointer-dereference-in-windows-smb-client-allows-an  
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-2026-119870 · Severity: high · CVSS 7 · Published 2026-11-10

Windows SMB Client, a component that allows computers to connect to network file shares, contains a flaw that could allow an authorized attacker to gain elevated system privileges on a local machine. An attacker with existing access to the system could exploit this vulnerability to take complete control of the computer.

Technologies: [Microsoft Windows SMB Client](https://junglewise.ai/threats/technologies/windows-smb-client). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-119870 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-119870 being exploited in the wild.

**How severe is CVE-2026-119870?** High severity, with a CVSS score of 7, published 10 November 2026.

**Which products and versions are affected?** Microsoft Windows SMB Client.

**Is there a fix for CVE-2026-119870?** 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-2026-119870 attacked?** It is attacked with local access.

**Am I affected by CVE-2026-119870?** Check whether you run Microsoft Windows SMB Client. 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

The vulnerability is an untrusted pointer dereference in the Windows SMB Client component. An authorized local attacker can exploit this flaw to elevate privileges on the target system. The attack requires existing user-level access and does not require user interaction or network connectivity.

## Affected products

- Microsoft Windows SMB Client

## Timeline

- 2026-11-10: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-119870](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-119870)

## Related threats

- [Windows SMB Client heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-112971-heap-based-buffer-overflow-in-windows-smb-client-allows-an)
- [Microsoft Windows SMB Client use-after-free remote code execution](https://junglewise.ai/threats/cve-2026-72936-microsoft-windows-smb-client-use-after-free-remote-code-execution)
- [Microsoft Windows SMB Client out-of-bounds read](https://junglewise.ai/threats/cve-2026-69618-microsoft-windows-smb-client-out-of-bounds-read)
- [Microsoft Windows SMB Client buffer over-read](https://junglewise.ai/threats/cve-2026-65794-microsoft-windows-smb-client-buffer-over-read)
- [Microsoft Windows SMB Client use after free privilege escalation](https://junglewise.ai/threats/cve-2026-40410-microsoft-windows-smb-client-use-after-free-privilege-escalation)