Pennington County and South Dakota: Pennington County closes most public-facing offices Monday amid cybersecurity incident

Pennington County, South Dakota, Responds to Cybersecurity Incident with Partial Office Closures

Pennington County, South Dakota, has temporarily closed most of its public-facing offices on Monday following a cybersecurity incident impacting portions of its network. The closures are intended to allow staff to assess the situation and restore affected systems securely.

While critical services remain operational including 911 dispatch, the county jail, juvenile services, the Care Campus, and other public safety operations some functions have been disrupted. Court operations, the 24/7 Program, and early voting at the Auditor’s Office will continue as scheduled. Residents needing vehicle registration services can still access South Dakota’s online portal or self-service kiosks.

The full scope of the incident is still under investigation, with county officials working alongside the South Dakota National Guard Cyber Incident Response Team, the South Dakota Fusion Center, the Cybersecurity and Infrastructure Security Agency (CISA), and other partners. Due to the ongoing nature of the investigation, limited verified details have been released. The county plans to provide its next public update by 11 a.m. on Monday.

Source: https://www.kotatv.com/2026/07/06/pennington-county-closes-most-public-facing-offices-monday-amid-cybersecurity-incident/

Pennington County, South Dakota TPRM report: https://www.rankiteo.com/company/pennington-county-sd

"id": "pen1783311828",
"linkid": "pennington-county-sd",
"type": "Cyber Attack",
"date": "7/2026",
"severity": "100",
"impact": "5",
"explanation": "Attack threatening the organization's existence"

{'affected_entities': [{'customers_affected': 'Residents of Pennington County',
                        'industry': 'Public Sector',
                        'location': 'South Dakota, USA',
                        'name': 'Pennington County',
                        'type': 'Government'}],
 'customer_advisories': 'Residents needing vehicle registration services can '
                        'still access South Dakota’s online portal or '
                        'self-service kiosks. Court operations, the 24/7 '
                        'Program, and early voting at the Auditor’s Office '
                        'will continue as scheduled.',
 'description': 'Pennington County, South Dakota, has temporarily closed most '
                'of its public-facing offices following a cybersecurity '
                'incident impacting portions of its network. The closures are '
                'intended to allow staff to assess the situation and restore '
                'affected systems securely. Critical services remain '
                'operational, but some functions have been disrupted.',
 'impact': {'operational_impact': 'Temporary closure of most public-facing '
                                  'offices; disruption of some functions',
            'systems_affected': "Portions of the county's network"},
 'investigation_status': 'Ongoing',
 'references': [{'source': 'Cybersecurity Incident Announcement'}],
 'response': {'communication_strategy': 'Public updates planned (next update '
                                        'by 11 a.m. on Monday)',
              'containment_measures': 'Temporary closure of public-facing '
                                      'offices',
              'remediation_measures': 'Assessing the situation and restoring '
                                      'affected systems',
              'third_party_assistance': 'South Dakota National Guard Cyber '
                                        'Incident Response Team, South Dakota '
                                        'Fusion Center, Cybersecurity and '
                                        'Infrastructure Security Agency '
                                        '(CISA)'},
 'title': 'Pennington County Cybersecurity Incident',
 'type': 'Cybersecurity Incident'}