Stay updated on DoS threats. Explore the latest news and insights on Denial of Service attacks, prevention tips, and cybersecurity strategies.
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Background for this topic.
DoS, which stands for Denial of Service, is a type of cyber attack where the aim is to make a computer or network resource unavailable to its intended users. This is done by overwhelming the target with a flood of internet traffic, or sending information that triggers a crash. In information security, DoS attacks are a significant threat as they can disrupt the operation of businesses, governments, and other organizations.
These attacks exploit the limitations in the target system’s resources, such as the bandwidth of a network, the processing power of a server, or the capabilities of a website. Attackers can use various methods to carry out a DoS attack, including but not limited to, TCP SYN floods, UDP floods, and ICMP floods. The impact of a DoS attack can range from temporary service interruptions to long-term outages, potentially leading to data losses, financial harm, and damage to an organization's reputation.
In the context of information security, defending against DoS attacks involves implementing proper security measures such as firewalls, intrusion detection systems, and robust network architecture. It also entails active monitoring of network traffic to identify and mitigate potential threats promptly. As cyber attackers continue to innovate, staying informed and prepared against DoS attacks is a critical aspect of maintaining cybersecurity resilience.
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The Apache Software Foundation (ASF) has released security updates to address several security vulnerabilities in the HTTP Server, including a severe vulnerability that could potentially lead to remote code execution (RCE)
Threat actors are exploiting security flaws in TBK DVR and end‑of‑life (EoL) TP-Link Wi-Fi routers to deploy Mirai-botnet variants on compromised devices, according to findings from Fortinet FortiGuard Labs and Palo Alto Networks Unit 42
CVE-2025-53521 was initially disclosed in October as a high-severity denial-of-service (DoS) flaw, but new information has revealed the bug is actually much more dangerous.
CVE-2025-53521 was initially disclosed in October as a high-severity denial-of-service (DoS) flaw, but new information has revealed the bug is actually much more dangerous.
2 More Vulnerabilities Need Patching in React Server Components, Warns VercelMass exploitation of the "React2Shell" - CVE-2025-55182 - vulnerability remains underway by nation-state hackers tied to China, North Korea and Iran, as well as financially motivated cybercriminals running everything from cryptomining malware to DDoS services, security experts warn.
Cisco on Wednesday disclosed that it became aware of a new attack variant that's designed to target devices running Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software releases that are susceptible to CVE-2025-20333 and CVE-2025-20362
Citrix has released fixes to address three security flaws in NetScaler ADC and NetScaler Gateway, including one that it said has been actively exploited in the wild
Citrix is warning that a vulnerability in NetScaler appliances tracked as CVE-2025-6543 is being actively exploited in the wild, causing devices to enter a denial of service condition. [...]
Citrix has released security updates to address a critical flaw affecting NetScaler ADC that it said has been exploited in the wild
This blog uncovers an active campaign exploiting CVE-2025-3248 in Langflow versions before 1.3.0 that deploys the Flodrix botnet, enabling threat actors to achieve full system compromise, initiate DDoS attacks, and potentially exfiltrate sensitive data.
A Mirai botnet variant dubbed Aquabot has been observed actively attempting to exploit a medium-severity security flaw impacting Mitel phones in order to ensnare them into a network capable of mounting distributed denial-of-service (DDoS) attacks
Palo Alto Networks is warning that hackers are exploiting the CVE-2024-3393 denial of service vulnerability to disable firewall protections by forcing it to reboot. [...]
Muhstik botnet exploits a critical Apache RocketMQ flaw (CVE-2023-33246) for remote code execution, targeting Linux servers and IoT devices for DDoS attacks and cryptocurrency mining
Patch now: CVE-2023-49606 in the open source, small-footprint proxy server can potentially lead to remote code execution.
Ongoing Rapid Reset DDoS flood attacks exposed organizations need to patch CVE-2023-44487 immediately to head off crippling outages and business disruption.
Crafted packets from cellular devices such as mobile phones can exploit faulty state machines in the 5G core to attack cellular infrastructure. Smart devices that critical industries such as defense, utilities, and the medical sectors use for their daily operations depend on the speed, efficiency, and productivity brought by 5G. This entry describes CVE-2021-45462 as a potential use case to deploy a denial-of-service (DoS) attack to private 5G networks.
Cyberattackers could exploit CVE-2023-20238 to carry out a variety of nefarious deeds, from data theft and code execution to phishing, fraud, and DoS.
The Mirai malware botnet is actively exploiting a TP-Link Archer A21 (AX1800) WiFi router vulnerability tracked as CVE-2023-1389 to incorporate devices into DDoS (distributed denial of service) swarms. [...]
The bug tracked as CVE-2022-0028 allows attackers to hijack firewalls without authentication, in order to mount DDoS hits on their targets of choice.