Critical MikroTik Vulnerability - Patch Now, (Sun, Sep 6th)
MikroTik patched a critical SSH authentication bypass already exploited in the wild; attackers add accounts to affected routers for post-patch persistence.
MikroTik released a patch late last week for a critical vulnerability allowing SSH authentication bypass that is already being exploited in the wild, per the vendor's September 2026 advisory. Attackers have been adding new accounts to affected devices to maintain access even after the patch is installed. The patch attempts to detect compromise and set a 'Flagged' status on affected devices, and SANS ISC advises administrators to assume compromise.
Week in review: Compromised Zimbra servers, previously patched Citrix NetScaler flaw exploited
Help Net Security's weekly digest highlights 274 compromised Zimbra servers, Gitea and Citrix NetScaler KEV additions, a PaperCut zero-day, and a suspected Iran-linked power plant attack.
The roundup reports at least 274 internet-facing Zimbra instances compromised via CVE-2026-73570, critical Gitea CVE-2026-60004 added to CISA's KEV catalog after exploitation began, and previously patched Citrix NetScaler flaw CVE-2026-8452 exploited in the wild. It also covers PaperCut NG/MF zero-day attacks, a suspected Iran-linked shutdown of a UK power plant, an FBI seizure of domains tied to a China-linked group that hit NASA, DOJ and the Senate, a cyberattack disrupting Boston Scientific, and the Manchester Airports Group breach. Additional items include Chameleon SEO poisoning phishing, Android car head unit proxy botnet malware, ReliaQuest social engineering by ShinyHunters, fake OpenAI Codex macOS malware, and AI-related workforce and supply chain interviews.