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security

A week in security (August 17 – August 23)

A list of topics we covered in the week of August 17 to August 23 of 2026

zeroday.news ·

--- Source 2 --- CareCloud Data Breach Exposes Patient Information

CareCloud, a prominent health technology company, has confirmed a data breach impacting its systems. The breach, which occurred on July 26, 2023, exposed sensitive patient data, including medical records, Social Security numbers, and bank account details. The company stated that the breach was detected promptly, and immediate steps were taken to secure its systems and investigate the incident. CareCloud has begun notifying affected individuals and is offering credit monitoring and identity theft protection services. The exact number of individuals affected has not yet been disclosed, but the company is working with law enforcement and cybersecurity experts to understand the full scope of the breach.

--- Source 3 --- Microsoft Defender Flaw Bypassed by "ShieldBreak"

A new exploit, dubbed "ShieldBreak," has been reported to bypass a previously issued patch for a Microsoft Defender vulnerability. The original vulnerability, identified as CVE-2023-21768, allowed for privilege escalation within the Microsoft Defender Antivirus. Microsoft had released a patch for CVE-2023-21768 earlier this year. However, security researchers have now demonstrated that ShieldBreak can circumvent this fix, potentially allowing attackers to gain elevated privileges on systems running Microsoft Defender. This development raises concerns about the effectiveness of the initial patch and the ongoing security of Windows systems. Microsoft has not yet commented on the ShieldBreak bypass or indicated when a new patch might be expected.

--- Source 4 --- Apple Addresses Image-Processing Vulnerability

Apple has released security updates to address a vulnerability in its image processing framework that could lead to arbitrary code execution. The flaw, which was not assigned a CVE in the provided material, affects multiple Apple operating systems, including iOS, iPadOS, macOS, and watchOS. Users are advised to update their devices promptly to the latest available versions to mitigate the risk. This vulnerability is distinct from a previously patched Screen Sharing flaw (CVE-2023-34419) that was reportedly exploited in the wild and also addressed in recent Apple updates. The company has not provided details on whether the image-processing flaw has been actively exploited.

--- Source 5 --- Google Chrome Patches Two Critical Vulnerabilities

Google has rolled out an urgent update for its Chrome browser to address two critical security vulnerabilities. While specific CVE identifiers were not provided in the report, the vulnerabilities are described as critical and could allow for remote code execution. Users are strongly advised to update their Chrome browsers immediately to the latest version to protect against potential exploitation. Google typically provides limited details on critical vulnerabilities until a significant portion of the user base has updated, to prevent attackers from leveraging the information.

--- Source 6 --- CareCloud Confirms Data Breach, Patient Data Compromised

CareCloud, a health technology provider, has confirmed a data breach that exposed sensitive patient information. The breach, which occurred on July 26, 2023, compromised medical records, Social Security numbers, and bank account details. The company detected the breach and took immediate action to secure its systems. CareCloud is in the process of notifying affected individuals and is offering credit monitoring and identity theft protection services. The full extent of the breach, including the number of affected individuals, is still under investigation, with CareCloud collaborating with law enforcement and cybersecurity experts.

--- Source 7 --- Microsoft Defender Vulnerability Returns: ShieldBreak Bypass

Security researchers have disclosed a new technique, "ShieldBreak," that effectively bypasses Microsoft's patch for CVE-2023-21768, a privilege escalation vulnerability in Microsoft Defender Antivirus. The original flaw allowed attackers to gain higher system privileges. While Microsoft had previously issued a fix for CVE-2023-21768, ShieldBreak demonstrates that the patch is insufficient, leaving systems vulnerable to the same class of attack. This development highlights the ongoing challenge of fully mitigating complex security vulnerabilities. Microsoft has not yet issued a statement regarding the ShieldBreak bypass or a timeline for a new corrective action.

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