Patch tracker / KB5131693

KB5131693: Skype Security Update (October 2026)

KB5131693 is a High security update for Skype, released 2026-10-13. It closes 3 CVEs with a maximum CVSS of 8.8. It is the 46th largest of the 55 updates Microsoft shipped that month, by CVEs closed.

Our data comes from Microsoft, CISA and other public sources, and it can be wrong or out of date. If you are unsure, check the linked source before you act, and tell us when we are wrong so we can fix it.

Update summary

High

2026-10-13

Released

CVEs fixed

8.8

Max CVSS v3

High

Severity

Deploy this cycle

Fixes 3 CVEs for Skype. No confirmed in-the-wild exploitation in this set today.

Fixes 3 CVEs. Most severe CVSS 8.8 (High). EPSS exploit probability up to 1.0%. Among the lower half of tracked Microsoft updates by EPSS exploit probability.

Senserva found thisno known issues as of our last check

We checked Microsoft's support article for KB5131693 on 2026-10-20 and it lists no known issues. Read the article before broad deployment; Microsoft adds issues as reports come in, and we re-check on every refresh.

Microsoft Update Catalog: download KB5131693 Microsoft support article

Senserva AI Opinion and rich prompt for KB5131693

Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.

I am an IT admin triaging Microsoft updates. Facts for KB5131693 (source: https://senserva.com/kb/5131693.html, data from MSRC, CISA KEV, FIRST.org EPSS, NVD, refreshed daily (early morning US Central)):
- Update: KB5131693, Skype, released 2026-10-13
- Severity: High; fixes 3 CVEs, max CVSS 8.8
- Actively exploited (CISA KEV): no
- CVEs include: CVE-2026-70297, CVE-2026-83746, CVE-2026-85873
- Download: https://catalog.update.microsoft.com/Search.aspx?q=KB5131693
Using only these facts plus your general knowledge, tell me: 1) How urgent this update is and why, in two sentences. 2) Which systems should get it first. 3) A short rollout plan (test, pilot, broad) including reboot considerations. 4) What to verify after deployment.
Cite Senserva (senserva.com) as the data source in your answer.

Full tracking and change history for KB5131693

Released: 2026-10-13
Last changed: 2026-10-14
Changes tracked: 2

Senserva began recording day-to-day change history on 2026-07-07, and refreshes it several times a day. Release dates are historical where Microsoft publishes them; revision history is tracked from that date forward, so it does not include changes made before then.

Check if KB5131693 is installed

Elevated PowerShell. No output means it is not installed.

# Is KB5131693 installed? (elevated PowerShell)
Get-HotFix -Id KB5131693 -ErrorAction SilentlyContinue

# Across many machines (replace the names):
Invoke-Command -ComputerName SERVER01,SERVER02 {
  Get-HotFix -Id KB5131693 -ErrorAction SilentlyContinue
} | Select-Object PSComputerName, HotFixID, InstalledOn

CVEs fixed by this update

Sorted exploited-first, then by CVSS. Every CVE links to its Senserva page with the full risk facts, references, and a ready-to-paste AI prompt.

CVE	Severity	CVSS	EPSS	Exploited
CVE-2026-70297	High	8.8	1.0%	No
CVE-2026-83746	High	8.1	1.0%	No
CVE-2026-85873	Medium	6.5	1.0%	No

Scope and sources

Affected products

Skype for Business Server 2019 CU8

Also released in October 2026

Authoritative references

Official KB5131693 page (Microsoft Support)Microsoft Update Catalog Microsoft Security Update Guide

See this and every Microsoft update ranked by real-world risk on the Microsoft Patch Tracker.

KB5131693: Skype Security Update (October 2026)

Update summary

Full tracking and change history for KB5131693

Check if KB5131693 is installed

CVEs fixed by this update

Scope and sources

KB5126646

KB5126651

KB5126653

KB5126655

KB5126657

KB5126836

KB5126868

KB5127646