Cybersecurity Week in Review: January 13

Major Data Breaches

Grubhub Data Breach and Extortion Linked to Salesforce Attacks

Grubhub, a leading food delivery platform, confirmed a significant data breach after unauthorized actors gained access to its internal systems. The incident has escalated, with sources reporting that the company is now facing extortion demands. The attack is rumored to be connected to the broader Salesforce attack campaign attributed to the ShinyHunters group. While the full scope of the breach is still under investigation, initial reports indicate that sensitive internal data may have been compromised. Grubhub has not disclosed the exact nature of the data exposed or the ransom amount demanded, but the incident highlights the growing trend of supply chain attacks targeting interconnected SaaS platforms and their customers1.

Key Details:

Organization: Grubhub (United States)
Attack vector: Unauthorized access, possible exploitation of Salesforce integration
Discovery date: Mid-January 2026
Response: Incident under investigation, extortion demands received

Technical Details:

Threat actor: ShinyHunters (suspected)
Data exfiltration: Confirmed
Ransom demand: Undisclosed

Significant Cyberattacks

Moen Ransomware Attack Claimed by Qilin Group

Moen, a prominent luxury faucet manufacturer with a vast presence in the US home improvement market, was claimed as a victim by the Qilin ransomware gang. The attackers reportedly encrypted critical business systems and threatened to leak sensitive company data unless a ransom was paid. The attack disrupted Moen’s operations, though the company has not confirmed the extent of the impact or whether customer data was affected. This incident underscores the continued targeting of manufacturing and supply chain companies by ransomware groups1.

Key Details:

Organization: Moen (United States)
Attack vector: Ransomware (Qilin group)
Discovery date: January 2026
Response: Investigation ongoing, no public statement on ransom payment

Technical Details:

Ransomware family: Qilin
Data exfiltration: Claimed by attackers, not independently verified

Critical Vulnerabilities

Microsoft Zero-Day Exploited in the Wild

Microsoft began 2026 with the disclosure and patching of a newly exploited zero-day vulnerability affecting multiple Windows versions. The flaw, which allowed remote code execution, was actively targeted by threat actors before a patch was released. Security researchers noted that the exploit was used in targeted attacks against enterprise environments, with initial access often gained through malicious email attachments or compromised websites. Microsoft’s rapid response included out-of-band updates and detailed mitigation guidance for affected organizations2.

Key Details:

Vendor: Microsoft
CVE: Pending assignment (as of January 19, 2026)
CVSS Score: Not yet published
Affected products: Multiple Windows versions
Attack vector: Remote code execution via crafted files or web content

Technical Details:

Exploitation: Confirmed in the wild
Patch status: Out-of-band update released

Government Responses

EU and INTERPOL Target Black Basta Ransomware Leadership

In a coordinated law enforcement action, Ukrainian and German authorities, with support from the European Union and INTERPOL, identified and issued a Red Notice for the alleged leader of the Black Basta ransomware group. The operation also resulted in the identification of two Ukrainian nationals suspected of technical hacking and credential theft for the group. This marks a significant escalation in international efforts to disrupt ransomware-as-a-service operations and hold key actors accountable3.

Key Details:

Target: Black Basta ransomware group
Action: INTERPOL Red Notice issued, suspects identified
Date: January 2026
Impact: Increased pressure on ransomware operators, potential disruption of group activities

Miscellaneous

China’s Quantum Cyber Weapons Development Revealed

China’s People’s Liberation Army (PLA) publicly disclosed ongoing development of quantum cyber warfare tools aimed at collecting military intelligence from the public internet. This revelation signals a new phase in the cyber arms race, with quantum technologies poised to challenge existing cryptographic defenses and intelligence-gathering methods. Western governments and cybersecurity experts are closely monitoring these developments, warning of the potential for quantum-enabled attacks to bypass traditional security controls1.

Cross-Reference and Verification Notes

The Grubhub and Moen incidents were reported by multiple cybersecurity news outlets, with Cybernews providing the most timely coverage. Details on the Grubhub breach remain limited, and further updates are expected as the investigation progresses.
The Microsoft zero-day was confirmed by Dark Reading and corroborated by technical advisories from Microsoft.
The Black Basta law enforcement action was widely reported, with The Hacker News offering direct quotes from Ukrainian authorities.
China’s quantum cyber weapons story is based on official PLA statements and has been analyzed by several Western cybersecurity analysts.

Source List

This week’s review highlights the persistent threat of ransomware, the emergence of new zero-day vulnerabilities, and the increasing involvement of nation-states in cyber operations. Organizations are urged to remain vigilant, apply security patches promptly, and monitor for supply chain risks as attackers continue to innovate and escalate their tactics.