CYBERSECURITYTRACKER
Briefings

Weekly recap: Week of 14 to 20 September 2026

Review the week's tracked stories, vulnerability changes, and unverified leak-site claims for the dates shown.

339 stories tracked; +30 vs prior week; 7 Cybersecurity and Infrastructure Security Agency (CISA) Known Exploited Vulnerabilities (KEV) additions; 183 ransomware leak-site claims observed in tracked feeds (unverified)

Monday to Sunday, Coordinated Universal Time (UTC). Permalink label: 2026-W38.

339
Stories
+30 vs prior week
7
CISA KEV additions
-8 vs prior week
183
Leak-site claims
+21 vs prior week

The 339 stories above are counted by publisher date (first-seen date where it is missing or unusable), and only for stories that have a summary and a why-it-matters line and are not thin or editorially excluded. The daily archive counts by the day the tracker first saw each story and does not require a summary or a why-it-matters line: its 7 day pages for these 7 days list 703 stories. The two figures use different dates and rules, so they are not expected to match.

Most covered

Most active ransomware groups (leak-site claims, unverified)

Most active ransomware groups by leak-site claims in the week of 14 to 20 September 2026, unverified
Qilin31 claims+23 vs prior week
The Gentlemen30 claims+12 vs prior week
Akira10 claims+3 vs prior week
N0n10 claims+10 vs prior week
Safepay8 claims-3 vs prior week
Storm8 claims+4 vs prior week
Emperador7 claims+1 vs prior week
Panzer6 claims+1 vs prior week
LockBit5 claims0 vs prior week
Metaencryptor5 claims+1 vs prior week

Leak-site claim data is unverified: RansomLook (CC BY 4.0), with ransomware.live as a failover, credited and linked as its terms require (Source: Ransomware.live).

Takedowns and arrests

4 more qualifying actions on the full feed.

All takedowns and arrests

CISA KEV additions

CISA KEV additions in the week of 14 to 20 September 2026
CVEVendor and productFederal fix deadline
CVE-2026-76461Cisco Secure Email Gateway
CVE-2026-76460Cisco Identity Services Engine
CVE-2025-39682Linux Kernel
CVE-2025-39964Linux Kernel
CVE-2026-53266Linux Kernel
CVE-2026-58704Google Pixel
CVE-2026-87886Acronis Backup

Vulnerabilities on the move, to (the 7 days before this recap was generated)

Vulnerabilities on the move between 2026-09-14 and 2026-09-21
CVEVendor and productWhat changed
CVE-2026-76461Cisco Secure Email GatewayAdded to CISA KEV 2026-09-14Added to VulnCheck KEV 2026-09-14Added to ENISA EUVD 2026-09-14Exploitation active since 2026-09-14
CVE-2026-50752checkpoint Quantum Security GatewayAdded to VulnCheck KEV 2026-09-16
CVE-2026-1281Ivanti Endpoint Manager Mobile (EPMM)EPSS exploit likelihood up 17 percentage points (0.99 now)
CVE-2026-1340Ivanti Endpoint Manager Mobile (EPMM)EPSS exploit likelihood up 12 percentage points (0.99 now)
CVE-2026-76460Cisco Identity Services EngineAdded to CISA KEV 2026-09-16Added to VulnCheck KEV 2026-09-16Added to ENISA EUVD 2026-09-16Exploitation active since 2026-09-16

Ransomware leak-site claims (20 of 183 shown, unverified)

Ransomware claim data is unverified: RansomLook (CC BY 4.0), with ransomware.live as a failover, credited and linked as its terms require (Source: Ransomware.live).

All leak-site claims and confirmed breaches

Glossary