---
title: "CVE-2026-69646: Skype for Business - Spoofing"
description: "Skype for Business contains a spoofing vulnerability caused by improper verification of cryptographic signatures, letting unauthorized attackers perform spoofing over an adjacent network, exploit requires network adjacency."
url: https://panop.io/threat-heartbeat/CVE-2026-69646/
---

# CVE-2026-69646 Skype for Business - Spoofing

Skype for Business contains a spoofing vulnerability caused by improper verification of cryptographic signatures, letting unauthorized attackers perform spoofing over an adjacent network, exploit requires network adjacency.

CVSS base score 8.3 /10

High

CISA KEV

Not listed

Public exploit

None known

EPSS

0.32% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-69646)

## Details

Type

Spoofing

Impact

Man In The Middle

CVSS vector

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

Published

8 September 2026

Updated

15 October 2026

Weakness

[CWE-347](https://cwe.mitre.org/data/definitions/347.html)

## Vendor fix

Update to the latest version of Skype for Business.

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-2026-69646](https://nvd.nist.gov/vuln/detail/CVE-2026-69646)
- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69646](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69646)

[← All CVEs](https://panop.io/threat-heartbeat/)

## 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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