Page last updated on September 18, 2025
Sinclair Broadcast Group, LLC initially disclosed a cybersecurity incident in an SEC 8-K filing on 2021-10-18 07:17:34 EDT.
Incident Details
Material: Unknown
Is Breach: Unknown
Records Compromised: Unknown
Data Types Impacted: No Data Types Tracked (yet)
Compromised Date: Unknown
Detected Date: Unknown
Disclosure Date: 2021-10-18
Contained Date: Unknown
Recovered Date: Unknown
Attack Goal: Unknown
Attack Tactics1: No Attack Tactics Tracked (yet)
Attack Techniques1: No Attack Techniques Tracked (yet)
Costs: No Costs Tracked (yet)
Filings
8-K filed on 2021-10-18
Sinclair Broadcast Group, LLC filed an 8-K at 2021-10-18 07:17:34 EDT
Accession Number: 0001193125-21-300540
Item 7.01 Regulation FD Disclosure.
On October 18, 2021, Sinclair Broadcast Group, Inc. issued a press release disclosing a cybersecurity incident. A copy of the press release is attached hereto as Exhibit 99.1. This press release is furnished under this Item 7.01 of this Current Report on Form 8-K and shall not be deemed filed with the Securities and Exchange Commission for purposes of Section 18 of the Securities Exchange Act of 1934, as amended.
Exhibit No. 99.1
Press Release dated October 18, 2021
Company Information
| Name | Sinclair Broadcast Group, LLC |
| CIK | 0000912752 |
| SIC Description | Television Broadcasting Stations |
| Ticker | |
| Website | |
| Category | Large accelerated filer |
| Fiscal Year End | December 30 |