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Zoho servers under attack

Updated on 2022-09-23: CISA Adds Critical Zoho Flaw to Known Exploited Vulnerabilities Catalog

The US Cybersecurity and Infrastructure Security Agency (CISA) has added a Java deserialization vulnerability in Zoho ManageEngine products to its Known Exploited Vulnerabilities (KEV) catalog. The critical flaw affects ManageEngine PAM360, Password Manager Pro, and Access Manager Plus. CISA has given federal agencies until October 13 to mitigate the flaw.


  • Good news: the vendor updates are available; bad news: you need to roll them out quickly. Note that Sophos Firewalls are also on the list with a code injection vulnerability in the User Portal and Webadmin functions which allow RCE.


Overview: Zoho servers under attack

On Thursday, CISA said that it’s now seeing attacks against Zoho ManageEngine servers that are exploiting CVE-2022-35405, a vulnerability the company patched back in June this year. A PoC and technical write-up for this one has been floating around the internet since early August, so no surprise here that it’s now seeing active exploitation.


Alex Lim is a certified IT Technical Support Architect with over 15 years of experience in designing, implementing, and troubleshooting complex IT systems and networks. He has worked for leading IT companies, such as Microsoft, IBM, and Cisco, providing technical support and solutions to clients across various industries and sectors. Alex has a bachelor’s degree in computer science from the National University of Singapore and a master’s degree in information security from the Massachusetts Institute of Technology. He is also the author of several best-selling books on IT technical support, such as The IT Technical Support Handbook and Troubleshooting IT Systems and Networks. Alex lives in Bandar, Johore, Malaysia with his wife and two chilrdren. You can reach him at [email protected] or follow him on Website | Twitter | Facebook

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