Operation Zero Disco: Attackers Exploit Cisco SNMP Vulnerability to Deploy Rootkits


TrendResearch has detected an operation where attackers exploited a Cisco Simple Network Management Protocol (SNMP) vulnerability to install a rootkit on vulnerable network devices.

The SNMP exploit referenced in Cisco’s latest advisory is CVE-2025-20352, which affects both 32-bit and 64-bit switch builds and can result in remote code execution (RCE). The operation targeted victims running older Linux systems that do not have endpoint detection response solutions, where they deployed Linux rootkits to hide activity and evade blue-team investigation and detection. Trend Research investigation also found that attackers used spoofed IPs and Mac email addresses in their attacks.

Read more…
Source: Trend Micro


Sign up for the Cyber Security Review Newsletter
The latest cyber security news and insights delivered right to your inbox


Related:

  • Trellix confirms data breach after hack of ‘a portion’ of its source code

    May 5, 2026

    Cybersecurity giant Trellix has confirmed suffering a cyberattack in which threat actors accessed parts of its source code. In a brief announcement published on its website, Trellix said it had identified “unauthorized access to a portion of source code repository”. As soon as it spotted the intrusion, the company brought in third-party security experts to ...

  • Quasar Linux (QLNX) – Inside a Full-Featured Linux RAT

    May 4, 2026

    In previous research, Trend Micro have demonstrated how AI can be used to improve detection accuracy when new malware families emerge, particularly those that reuse or share code from open-source repositories. In this blog entry, Trends Micro researchers present another compelling finding from the same approach. Trend Micro platform recently flagged an unusual Linux implant with ...

  • Thousands of Facebook accounts stolen by phishing emails sent through Google

    May 4, 2026

    Researchers have uncovered a long-running phishing operation that abuses trusted Google services to hijack tens of thousands of Facebook accounts. The compromised Facebook accounts are mainly business and advertiser profiles, which criminals can monetize after gaining access and control. The attackers found a way to send phishing emails that come “through Google,” making them look legitimate ...

  • Employees are now more dangerous to their company than external hackers

    May 4, 2026

    New data from Orange Cyberdefense has suggested the biggest risks companies face could now be coming from inside, with internal threats rising from 47% to 57% in the space of less than a year. For the first time ever, internal threats have become more common that external ones, with hacking remaining pretty steady at 31% of ...

  • Hackers crawled Canadian streets with SMS blasters causing 13 million network disruptions

    May 1, 2026

    Authorities in Canada have disclosed details of a mobile cyber operation that relied on SMS blasters mounted inside vehicles moving through urban areas. Three suspects drove around downtown Toronto with these hidden devices running in their cars, impersonating cell towers. The Toronto Police Service confirmed that this marked the first operation of its kind ever recorded ...

  • Pro-Iran crew turns DDoS into shakedown as Ubuntu com stays down

    May 1, 2026

    Canonical says its web infrastructure is under attack after a pro-Iran hacktivist group instructed its members to target the open source giant. “I can confirm that Canonical’s web infrastructure is under a sustained, cross-border Distributed Denial of Service (DDoS) attack” a Canonical spokesperson told The Register. “Our teams are working to restore full availability to all ...