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Ryan Seguin

Security Response Manager

Ryan Seguin's picture

Ryan joined Tenable in 2013 as a customer support engineer assisting customers with technical troubleshooting and product education. After that, he helped create dashboard and report templates for SecurityCenter that users can download through the Tenable.sc feed. Now Ryan is a member of the Security Response team, informing customers of the latest security threats, and providing in-depth analytics for today’s most critical vulnerabilities.

Interests outside of work: Ryan is a retro video game console/arcade hardware enthusiast and modder, and he is also studying Japanese and hopes to one day be fluent.

Blog Post

Multiple Vulnerabilities in CodeMeter Leave Managed Industrial Control Systems Open to Attack

Tuesday, September 29, 2020

Six vulnerabilities in a popular license management product put industrial control systems at risk for remote attacks. Background On September 8, researchers at Claroty published their detailed analysis , dubbed...

Blog Post

CVE-2020-1472: 'Zerologon' Vulnerability in Netlogon Could Allow Attackers to Hijack Windows Domain Controller

Monday, September 14, 2020

Security researchers reveal how the cryptographic authentication scheme in Netlogon can be exploited to take control of a Windows domain controller (DC). Update: September 21, 2020: The ‘Identifying Affected Systems’...

Blog Post

CVE-2020-10713: “BootHole” GRUB2 Bootloader Arbitrary Code Execution Vulnerability

Wednesday, July 29, 2020

Recently disclosed vulnerability in GRUB2 bootloader dubbed “BootHole” could allow an attacker to gain silent malicious persistence by attacking the GRUB2 config file, grub.cfg. Background On July 29, researchers at...

Blog Post

CVE-2020-8193, CVE-2020-8195, and CVE-2020-8196: Active Exploitation of Citrix Vulnerabilities

Wednesday, July 15, 2020

Following active exploitation against F5 BIG-IP devices, exploit attempts targeting newly disclosed vulnerabilities in Citrix products have begun, which include potential extraction of VPN sessions on vulnerable targets. Background On...

Blog Post

CVE-2020-11896, CVE-2020-11897, CVE-2020-11901: Ripple20 Zero-Day Vulnerabilities in Treck TCP/IP Libraries Disclosed

Tuesday, June 16, 2020

Researchers discovered 19 new zero-day vulnerabilities in a TCP/IP software library developed by Treck. Dubbed Ripple20, the batch includes CVE-2020-11901, which has the potential to allow control of an internet-connected...

Blog Post

CVE-2020-12720: vBulletin Urges Users to Patch Undisclosed Security Vulnerability

Friday, May 8, 2020

vBulletin released patches for an undisclosed security vulnerability, encouraging users to apply the patch as soon as possible. Update 05/12/20: Updated the Analysis and Proof of concept section to reflect...

Blog Post

Adobe Type Manager Library Font Parsing Remote Code Execution Vulnerabilities Exploited in the Wild (ADV200006)

Monday, March 23, 2020

Microsoft releases an out-of-band advisory for remote code execution vulnerabilities being actively exploited in the wild. Update April 14, 2020: Microsoft has updated its advisory with reference to CVE-2020-1020 ,...

Blog Post

ThemeGrill Demo Importer Vulnerability Actively Exploited in the Wild

Tuesday, February 18, 2020

Severe vulnerability in ThemeGrill Demo Importer WordPress plugin is being actively exploited in the wild. Users should upgrade to version 1.6.3 ASAP. Background The ThemeGrill Demo Importer WordPress plugin allows...

Blog Post

CVE-2019-19781: Unauthenticated Remote Code Execution Vulnerability in Citrix ADCs and Gateways

Monday, December 23, 2019

Citrix urges customers to apply mitigation steps for CVE-2019-19781, a remote code execution vulnerability exploitable through specially crafted HTTP requests to vulnerable devices. Background Citrix has released an advisory for...

Blog Post

Oracle Critical Patch Update for October Contains 180 Fixes

Wednesday, October 16, 2019

Oracle addresses 180 CVEs across 219 security patches in October’s Critical Patch Update, including a critical vulnerability in Oracle NoSQL Database. On October 15, Oracle released its Critical Patch Update...

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