Blog | Holm Security | Hacker attacks & exploits

March 17, 2023 — Hacker attacks & exploits Microsoft Outlook Zero Day Vulnerability CVE-2023-23397 Actively Exploited Threat Advisory: Holm Security is urging all customers and partners to update Microsoft Outlook after the discovery of a critical vulnerability, CVE-202323397, in the email client that cybercriminals are actively exploiting in the wild. We will be updating...

December 16, 2022 — Hacker attacks & exploits Critical Vulnerability in FortiOS

Overview FortiOS SSL-VPN doesn't validate HTTP requests properly, leading to an overflow...

April 1, 2022 — Hacker attacks & exploits Spring4Shell: Zero-Day Vulnerability in Spring Framework

General information Two RCEs exist and three vectors are being discussed online (one of...

December 14, 2021 — Hacker attacks & exploits How to Remediate the Log4j 2 Vulnerability

This vulnerability can allow an attacker to, if exploited on a server, gain complete...

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October 3, 2019 — Hacker attacks & exploits Are You Protected against Malware Attacks?

At Holm Security, we provide solutions for vulnerability assessment. In meetings with our customers, we sometimes discuss previous incidents that could've...

August 29, 2019 — Hacker attacks & exploits How a Cyber Weapon is Made

The Delivery Mechanism This part of the cyber weapon ensures it hits its target - or reaches the right client, hardware, or network. The delivery can be done...

June 17, 2019 — Hacker attacks & exploits How Hackers use Legitimate-Looking Domains to Attack You

May 22, 2019 — Hacker attacks & exploits The Hydro-Attack Cost 350 Million – This Is How It Happened!

Today, not all systems are running yet and they estimated that it may take several months before they are up and running again. The attack probably started as...

March 8, 2019 — Hacker attacks & exploits The 1177 Leak Could Have Easily Been Avoided

According to Stefan Thelberg, security expert and CEO at Holm Security, the 1177 leak could have easily been avoided if basic security measures had been in...

October 2, 2018 — Hacker attacks & exploits 10 Different Ways an Attacker Can Put in Backdoors in IT systems

1. Simply a Programming Error? If you get a developer to set up a back door. It can be so subtle, you might mistake it for a programming error. Occasionally,...

Hacker attacks & exploits

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