---
title: "CVE-2026-70297: Microsoft Skype for Business & Lync - Path Traversal"
description: "Microsoft Skype for Business and Lync contain an absolute path traversal vulnerability caused by improper validation of file paths, letting authorized attackers execute code over a network, exploit requires user authentication."
url: https://panop.io/threat-heartbeat/CVE-2026-70297/
---

# CVE-2026-70297 Microsoft Skype for Business & Lync - Path Traversal

Microsoft Skype for Business and Lync contain an absolute path traversal vulnerability caused by improper validation of file paths, letting authorized attackers execute code over a network, exploit requires user authentication.

CVSS base score 8.8 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

1.02% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-70297)

## Details

Type

Path Traversal

Impact

Remote Code Execution

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Published

13 October 2026

Updated

15 October 2026

Weakness

[CWE-36](https://cwe.mitre.org/data/definitions/36.html)

## Vendor fix

Update to the latest available version.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-70297](https://nvd.nist.gov/vuln/detail/CVE-2026-70297)
- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70297](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70297)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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