Mimecast, which provides email management systems, updates that the hacker was able to hack into the company’s systems and access customer information.
According to the company, the hacker was able to gain access to a certificate used to identify Mimecast services located on Microsoft’s server.
The company also states that all customers who may have been harmed have been updated and it also asks all customers of the company to replace the existing certificate in their possession with a new certificate issued by the company.
The breach was identified by Microsoft, which updated Mimecast that an unidentified source accessed the company’s servers.
According to DZNet: Mimecast says hackers abused one of its certificates to access Microsoft accounts.
Mimecast, a provider of email management software, said learned of the security incident from Microsoft.
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🛡️ AUMINT Trident simulates real-world attacks, training teams to detect deception, verify communications, and react under pressure, reinforcing human security layers.
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🔗 https://www.social-searcher.com/
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🔗 https://hootsuite.com/
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🔗 https://tweetdeck.twitter.com/
5️⃣ CrowdTangle (Free Access for Media/Research) – Detects viral content, misinformation, and brand impersonation.
🔗 https://www.crowdtangle.com/
6️⃣ Brand24 Free Plan – Track public social mentions and potential threats.
🔗 https://brand24.com/
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🔗 https://www.google.com/alerts
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At AUMINT.io, we complement technical monitoring with simulated social engineering attacks, testing how employees react when attackers exploit social channels.
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