Summit Threat Brief · free

What attackers are exploiting, and whether it matters to you.

A short, sourced brief for executives of Texas companies with 50 to 500 people. We read the vendor advisories and CISA’s exploited-vulnerability catalog so you don’t have to, then answer three questions per item: what happened, are you exposed, and what to do by when.

Published when there is something worth your time
0–6 items
Plain English first, technical detail folded away
Every item cites a primary source

Read Brief No. 1 Does this affect you?

What’s in Brief No. 1

Sep 29, 2026 · 6 items · 4 also on the list

4act now
1plan
1know
4also on the list

CISA additions

Exploited vulnerabilities CISA added, Sep 22–27

Mid-market stack

That matter to a typical mid-market stack

WordPress

0DAYS

From WordPress patch to first attack attempt

SharePoint

6WKS

SharePoint fix sat available before exploitation

01Set it once

Tell us what you run. Every brief opens marked for you.

Pick the systems your company uses. Each brief then flags the items that apply to you and fades the rest. Your choices stay in this browser; nothing is sent to Summit or anyone else.

What your company runs

11 systems to choose from, or Not sure

The latest brief, for you

Brief No. 1 · Sep 29, 2026

–

Pick at least one system to see which of the latest brief’s six items apply to you.

Open Brief No. 1

02How the brief is made

Three rules, applied to every brief

Exploited, not just severe.

Rule 01

An item makes the brief when there is evidence attackers are using it now, starting with CISA’s Known Exploited Vulnerabilities catalog and vendor confirmations. A high severity score alone doesn’t qualify. Most “critical” bugs are never exploited; the ones that are get used within days.

See it: NetScaler, attacked as a zero-day

Matched to what you actually run.

Rule 02

Microsoft 365 and Windows, remote-access gateways, firewalls, the website, and the tools your MSP depends on. A flaw in a platform mid-market companies don’t run goes in the “also on the list” table, not the headline.

See it: four exploited flaws we moved to the side table

Every item sourced. Nothing invented.

Rule 03

Each item links to the vendor advisory or government notice it comes from. No statistics we can’t cite, no client details, no fear-selling. Written by Summit and checked against primary sources before it publishes.

See it: every claim on the SharePoint item is linked

03Latest

Brief No. 1 · Week of September 22–29, 2026

Remote-access gateways under attack, a patched SharePoint flaw goes live, and CISA changes the signal

Sep 29, 2026 · 6 items · 8 min

If your company uses Citrix NetScaler or Check Point for remote access, runs SharePoint on its own servers, or has a WordPress website, there is something to do this week. Plus a change at CISA your IT team or MSP needs to know about.

4 act now1 plan1 know4 also on the list

Read Brief No. 1

The 6 items

1Citrix NetScaler: patch today
2Check Point: September fixes
3SharePoint Server: August update
4WordPress: update to 7.1.2
5F5 BIG-IP: one OAuth question
6CISA bulletin change: two questions for patching

Next brief

Published when the watch list produces one.

Flash advisories

Flash

An occasional single-item note when something is being widely exploited in a product common in mid-market companies. Rare by design.

04The watch list

Four things on our watch list

Each brief draws on these four public sources. It is general information, not monitoring of your systems.

Exploited vulnerabilities

Input 1

New entries in CISA’s Known Exploited Vulnerabilities catalog: vendor, product, and whether ransomware crews are using it.

CISA KEV catalog (JSON feed), CISA alerts

The mid-market stack

Input 2

Security advisories and active exploitation in Microsoft 365, Entra ID, Windows, Fortinet, Cisco, Palo Alto, SonicWall, Ivanti, Citrix, Check Point, F5, VMware, and common remote-management and backup tools.

Vendor advisories, CISA, security press

Sectors Summit focuses on

Input 3

Active ransomware and phishing campaigns against healthcare, financial services, and payment-card businesses, and anything Texas-specific.

FBI / IC3, sector regulators, security press

Program-level changes

Input 4

Changes at CISA, NIST, PCI SSC, and regulators that alter how a company should run patching, reporting, or compliance.

Agency notices, standards bodies

05Formats

Three ways the brief reaches you

The Threat Brief

Free

Zero to six items, each with the three questions answered and the technical detail folded away for your IT lead or MSP. Published here and posted to LinkedIn.

Published: when there is something worth your time · Length: 5–8 min

Flash advisory

Out of band

An occasional one-page note on a single item, when a flaw is being widely exploited in a product common in mid-market companies. Three plain sentences for the executive, then the detail. Rare on purpose.

Published: occasionally · Length: 1 page

Matched to your company, in Vantage

For clients

The full brief, matched to the systems, vendors and AI tools in your Vantage profile: whether each item affects you and why, reviewed by Summit before you see it, and turned into a roadmap task with an owner.

Status: coming to Summit clients

The Summit Threat Brief is general information. It is not monitoring, detection or incident response, and it doesn’t replace advice about your own environment.

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