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Security News — 20 October 2026

A daily, automatically-compiled digest of the cyber security stories that broke in the last 24 hours, drawn from 5 trusted feeds. Each entry is a short excerpt — follow the link to read the full article at its original publisher. Compiled 20 October 2026 · 5 items.

Top priorities today

  1. Possible new Cellebrite iPhone Radio Zero-Day exploited Schneier on Security
  2. CISA Adds Six Known Exploited Vulnerabilities to Catalog exploited CISA Current Activity
  3. There's only so much code: the rise in vulnerability numbers Cisco Talos

Urgent Vulnerabilities 1

Actively exploited, critical, or high-severity flaws — patch or mitigate first.

CISA Current Activity20 Oct

CISA Adds Six Known Exploited Vulnerabilities to Catalog

KEV · exploited
Exploited
Yes — CISA KEV
Product
Plex Media Server
Impact
Server-side request forgery
Action
Patch per vendor / CISA KEV

CISA has added six new vulnerabilities to its Known Exploited Vulnerabilities (KEV) Catalog , based on evidence of active exploitation. CVE-2026-96652 Plex Media Server Server-Side Request Forgery (SSRF) Vulnerability CVE-2026-96654 Plex M…

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Threat Activity 2

Malware, campaigns and adversary tradecraft.

TrustedSec Blog20 Oct

Handling Pre-Contract FCI and CUI

<p>CMMC requirements don’t exist before a contract does and that distinction matters. In this blog, we clarify what FCI and CUI obligations apply during the pre-contract solicitation phase, and where the line actually is.</p>

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Breaches & Incidents 1

Ransomware, data breaches and supply-chain events.

Schneier on Security20 Oct

Possible new Cellebrite iPhone Radio Zero-Day

Exploited

Justin.sh is reporting on a confidential Cellebrite document that has been leaked to him: Cellebrite calls it Advanced Unlocks (AU from here on), not to be confused with the “advanced unlocking services” they’ve marketed for years. A press…

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Research & Detection 1

Detection engineering, tooling and defensive analysis.

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