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A now patched security vulnerability in Zimbra Collaboration was exploited as a zero-day earlier this year in cyber attacks targeting the Brazilian military
Even after their zero-day vulnerability turned into an n-day, attackers known as Marbled Dust or Sea Turtle continued to spy on military targets that had failed to patch Output Messenger.
Microsoft has patched an Outlook zero-day vulnerability (CVE-2023-23397) exploited by a hacking group linked to Russia's military intelligence service GRU to target European organizations. [...]