ICO Fines South Staffordshire Water £963,900 Over Cl0p Ransomware Attack and Data Breach – May 2026
Impact Assessment Rationale
The fine of nearly £1 million and exposure of over 633,000 individuals' data represents a significant regulatory and reputational event for a UK critical infrastructure operator; cyber and liability insurers covering water utilities face potential claims exposure from similar incidents.
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Summary
The UK Information Commissioner's Office (ICO) fined South Staffordshire Water £963,900 ($1.3 million) on 11 May 2026 for a Cl0p ransomware attack that allowed hackers to remain undetected on the company's network for nearly two years. The breach resulted in the personal data of 633,887 customers and employees being published in August 2022. The incident highlights significant cybersecurity vulnerabilities in UK critical water infrastructure.
This summary is AI-generated from linked source reports and may change as more information becomes available. See our correction policy for how to report errors.
Structured Intelligence
known
- ICO issued a fine of £963,900 against South Staffordshire Water on 11 May 2026
- The Cl0p ransomware group conducted the attack
- Personal data of 633,887 customers and employees was published in August 2022
- Hackers remained undetected on the network for nearly two years
reported
- The breach involved prolonged, undetected network access by threat actors
- The ICO investigation found the company failed to prevent or detect the intrusion in a timely manner
uncertain
- The full scope of data types exfiltrated beyond personal data is not confirmed in this summary
- Whether South Staffordshire Water will appeal the fine is unknown
- The exact entry vector used by Cl0p has not been specified in the article
Affected Countries
Key Entities
Sources
Trade Media
- The Record (Cyber)12 May 2026, 01:20
Timeline
Status changed to monitoring
Auto-transitioned: no updates for 6 hours
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remediation: existing authoritative signal
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signal → active
Initial Detection
The UK Information Commissioner's Office (ICO) fined South Staffordshire Water £963,900 ($1.3 million) on 11 May 2026 for a Cl0p ransomware attack that allowed hackers to remain undetected on the company's network for nearly two years. The breach resulted in the personal data of 633,887 customers and employees being published in August 2022. The incident highlights significant cybersecurity vulnerabilities in UK critical water infrastructure.
The Information Commissioner's Office (ICO) fined South Staffordshire Water £963,900 ($1.3 million) on Monday over an attack by the Cl0p ransomware group that led to the personal data of 633,887 customers and employees being published in August 2022.
Source: The Record (Cyber) (Trade Media) · View source