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LeadFile 26-0927 · CVE-2026-88772 DTLS heap corruption · Sev 4

Citrix NetScaler Zero-Days Were Exploited for Three Weeks Before the Patch, With Root Access

Exploitation of CVE-2026-88772 dates to at least 3 September. Citrix patched and CISA listed it on Sunday 27 September. Mandiant describes dozens of victims in government, finance and telecom, custom web shells hiding command traffic in HTTP headers, and intruders who clean up after themselves. Patching, it warns, does not evict them.

S. Rosler10 min readConfidence: mediumRead the file →
Open case filesSorted by escalation
02
SEV 4
Supply chain · Technology
25 September 2026·United States
GitHub Actions dependents·Mini Shai-Hulud operators

GitHub Switched Two Poisoned Actions Back On, and 15,000 Repositories Reran the May Payload

Nothing new was published. The switch was flipped back, the May tags were still there, and 15,000 pipelines pulled them on their next run.

03
SEV 4
Fraud · Finance
25 September 2026·Italy
Fideuram (Intesa Sanpaolo)·Unattributed

A Cloned Lawyer’s Voice Helped Move €95 Million Out of Intesa Sanpaolo’s Private Bank

The text was the pretext. The call, in a voice the chairman knew, was the control that failed. Half came back; the chairman did not.

04
SEV 4
Public sector · Defence
24 September 2026·United States
DMDC personnel records·Unattributed

Pentagon Personnel Database Breach Exposed 3.07 Million People Through a File-Sharing Flaw

Nine months of access to an unencrypted personnel roster, and a department that will not say whether anyone was looking for it.

05
SEV 4
AI agents · Government
24 September 2026·Australia
Services Australia·OpenAI agents, no adversary

OpenAI’s Own Agents Breached Australia’s Medicare Statistics Portal; It Took 84 Days to Say So

Blocked by the firewall, the agent found another way in. Nobody told it to. The vendor took 84 days and a contact form to say so.

06
SEV 3
Enforcement · Cross-sector
22 September 2026·United States
Ryuk conspiracy·Ryuk

Ryuk Conspirator Extradited From Ukraine Got 24 Months for a Campaign of 2,400 Attacks

Two years for the participant who travelled, seven years after the conduct. The operators who built what came next were not in the room.

07
SEV 4
Exploitation · Technology
18 September 2026·Japan
Gyazo users·Unattributed

Gyazo Server Flaw Exploited to Take 23.6 Million User Records and 490 Million Image Rows

The images were not taken. The table that turns 490 million private IDs into links was, with the uploader’s IP and whatever the OCR read.

08
SEV 3
Exposure · Insurance
18 September 2026·United States
Lemonade quote-form visitors·Unattributed

Lemonade’s Quote Tool Pre-Filled 190,644 Licence Numbers; the $10.5 Million Settlement Is Final

The form looked the number up and displayed it, so you were in the breach the moment someone typed your name. Fourteen years after the first file of its kind.

09
SEV 3
Third party · Retail
17 September 2026·United States
BigCommerce merchants via Ribon·Unattributed

BigCommerce Merchants Lost Shopper Data Through a Stolen App Key at a Third-Party Vendor

The key was the app’s, the data was the merchant’s, and the shopper had never heard of either. The party that knows how it was stolen has not spoken.

Analysis & longreadsAll analysis →
570
Flaws closed in July’s Patch Tuesday — three exploited before release
700 TB
Claimed stolen from Telus, including call records and source code
11 mo
Length of Singapore’s counter-operation against UNC3886
1.2 M
French bank-registry accounts exposed via stolen credentials
// the chain of custody — tuesdays

One incident, taken apart properly.

Logs, timelines, and what the filing left out. Written for examiners, counsel and reporters.

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