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Jul 26, 2021
PetitPotam NTLM Relay Attack
THE THREAT PetitPotam is a variant of NTLM Relay attacks discovered by security researcher Gilles Lionel. Proof of Concept code released last week [1] relies on the Encrypting File System Remote (EFSRPC) protocol to provoke a Windows host into performing an NTLM authentication request against an attacker-controlled server, exposing NTLM authentication details or authentication certificates.…
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Jul 12, 2021
Tecala and eSentire Partner to Protect Enterprises across APAC from Business-Disrupting Cyber Attacks
Sydney, 12 July, 2021 - Tecala, Australia’s award-winning technology services and IT consulting provider, today announced it has chosen eSentire, the global Authority in Managed Detection and Response (MDR) cybersecurity services, as their exclusive MDR solution provider in Australia and New Zealand. This partnership will enable Tecala to augment its cybersecurity practice and offer enterprises…
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Security advisories — Jul 12, 2021

SolarWinds Serv-U Zero-Day Vulnerability

1 min read


SolarWinds announced that a zero-day vulnerability exists in the Serv-U Managed File Transfer Server and Serv-U Secured FTP products and is under active exploitation by at least one threat actor group. The vulnerability is tracked as CVE-2021-35211; it is categorized as a Remote Code Execution (RCE) vulnerability, and exploitation may allow a threat actor to run arbitrary code with privileges.

SolarWinds released a hotfix to remediate the vulnerability in both Serv-U Managed File Transfer Server and Serv-U Secured FTP. Organizations are strongly recommended to apply the hotfix as soon as possible as exploitation is ongoing.

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What you should do about it

Additional information

CVE-2021-35211 exists in Serv-U version 15.2.3 HF1 released May 5, 2021 and all prior Serv-U versions. Serv-U Managed File Transfer Server and Serv-U Secured FTP are the only impacted SolarWinds products.

SolarWinds was notified of the zero-day vulnerability by Microsoft. According to SolarWinds, “…vulnerability exploit involves a limited, targeted set of customers and a single threat actor”. No additional details on the attacks exploiting this vulnerability are publicly available at the time of writing.


[1] https://www.solarwinds.com/trust-center/security-advisories/cve-2021-35211