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ZDI-26-627: Backblaze Personal Computer Backup bztransmit Link Following Denial-of-Service Vulnerability
ZDI published ZDI-26-627 for a local denial-of-service flaw (CVE-2026-19820, CVSS 6.1) in Backblaze Personal Computer Backup's bztransmit component.
The Zero Day Initiative published advisory ZDI-26-627 describing a link-following denial-of-service vulnerability in the bztransmit component of Backblaze Personal Computer Backup. Local attackers must first execute low-privileged code on the target system to trigger the condition. The issue carries a CVSS score of 6.1 and is tracked as CVE-2026-19820.
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ZDI-26-625: Backblaze Personal Computer Backup bzserv Link Following Denial-of-Service Vulnerability
ZDI disclosed CVE-2026-19820, a CVSS 6.1 local link-following denial-of-service flaw in the bzserv component of Backblaze Personal Computer Backup.
The Zero Day Initiative published advisory ZDI-26-625 for a denial-of-service vulnerability in Backblaze Personal Computer Backup's bzserv component. A local attacker must already be able to execute low-privileged code on the system to trigger the flaw, which involves link following. ZDI assigned a CVSS score of 6.1 and the CVE identifier CVE-2026-19820.
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ZDI-26-626: Backblaze Personal Computer Backup bzfilelist Link Following Denial-of-Service Vulnerability
ZDI published ZDI-26-626 for a local denial-of-service flaw (CVE-2026-19820, CVSS 6.1) in Backblaze Personal Computer Backup's bzfilelist component.
The Zero Day Initiative published advisory ZDI-26-626 describing a link-following denial-of-service vulnerability in the bzfilelist component of Backblaze Personal Computer Backup. Local attackers must first execute low-privileged code on the target system to trigger the condition. The issue carries a CVSS score of 6.1 and is tracked as CVE-2026-19820.
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ZDI-26-624: Backblaze Personal Computer Backup bzbackup Link Following Denial-of-Service Vulnerability
ZDI disclosed CVE-2026-19820, a CVSS 6.1 local link-following denial-of-service flaw in the bzbackup component of Backblaze Personal Computer Backup.
The Zero Day Initiative published advisory ZDI-26-624 for a denial-of-service vulnerability in Backblaze Personal Computer Backup's bzbackup component. A local attacker must first gain the ability to run low-privileged code on the target system to trigger the link-following flaw. ZDI rated the issue CVSS 6.1 and assigned CVE-2026-19820.
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ZDI-26-628: Backblaze Personal Computer Backup bzreports Link Following Denial-of-Service Vulnerability
ZDI disclosed CVE-2026-19820, a CVSS 6.1 local link-following denial-of-service flaw in the bzreports component of Backblaze Personal Computer Backup.
The Zero Day Initiative published advisory ZDI-26-628 for a denial-of-service vulnerability in Backblaze Personal Computer Backup's bzreports component. A local attacker must first obtain the ability to execute low-privileged code on the system to exploit the link-following flaw. ZDI rated the issue CVSS 6.1 and assigned CVE-2026-19820.
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Week in review: Windows kernel flaw patched, suspected Fortinet FortiWeb zero-day exploited
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Iranian hackers use CHOSEN BRICK Windows malware to spy on targets
Iranian state-linked hackers use CHOSEN BRICK Windows malware, spread via Telegram and WhatsApp social engineering, to spy on dissidents and journalists worldwide.
US, UK, and Dutch cyber agencies with the FBI issued a joint advisory on Iranian state-linked hackers deploying a Windows malware strain called CHOSEN BRICK against dissidents, activists, and journalists, primarily in the US, UK, and Netherlands. Attacks begin with messages on WhatsApp or Telegram impersonating trusted contacts or technical support, tricking victims into running malicious files disguised as apps such as Pictory, RunwayML, Norton Antivirus, Telegram, and KeePass. The malware persists via Registry Run keys, adds Microsoft Defender exclusions, and uses a per-victim Telegram bot for command-and-control while stealing email, Telegram and WhatsApp data, screenshots, and audio. Stolen data is exfiltrated via Telegram or cloud services like VultrObjects and StorjShare, and sometimes appears on pro-Iranian leak sites, increasing physical risk for dissidents abroad.
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Week in review: High-severity LPE vulnerability in the Linux kernel, cPanel 0-day exploited for months
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Week in review: Sudo local privilege escalation flaws fixed, Google patches actively exploited Chrome
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Week in review: Microsoft patches 5 actively exploited 0-days, recently fixed Chrome vulnerability exploited
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