Firewall
Fortinet warns of 5-year-old FortiOS 2FA bypass still exploited in attacks
Fortinet has warned customers that threat actors are still actively exploiting a critical FortiOS vulnerability that allows them to bypass two-factor authentication (2FA) when targeting vulnerable FortiGate firewalls. Tracked as CVE-2020-12812, this improper authentication security flaw was found in FortiGate SSL VPN and enables attackers to log in to unpatched firewalls without being prompted for the […]
Critical RCE flaw impacts over 115,000 WatchGuard firewalls
Over 115,000 WatchGuard Firebox devices exposed online remain unpatched against a critical remote code execution (RCE) vulnerability actively exploited in attacks. The security flaw, tracked as CVE-2025-14733, affects Firebox firewalls running Fireware OS 11.x and later (including 11.12.4_Update1), 12.x or later (including 12.11.5), and 2025.1 up to and including 2025.1.3. Successful exploitation enables unauthenticated attackers to […]
New critical WatchGuard Firebox firewall flaw exploited in attacks
WatchGuard has warned customers to patch a critical, actively exploited remote code execution (RCE) vulnerability in its Firebox firewalls. Tracked as CVE-2025-14733, this security flaw affects firewalls running Fireware OS 11.x and later (including 11.12.4_Update1), 12.x or later (including 12.11.5), and 2025.1 up to and including 2025.1.3. The vulnerability is due to an out-of-bounds write weakness that enables […]
New SonicWall SonicOS flaw allows hackers to crash firewalls
American cybersecurity company SonicWall urged customers today to patch a high-severity SonicOS SSLVPN security flaw that can allow attackers to crash vulnerable firewalls. Tracked as CVE-2025-40601, this denial-of-service vulnerability is caused by a stack-based buffer overflow impacting Gen8 and Gen7 (hardware and virtual) firewalls. “A Stack-based buffer overflow vulnerability in the SonicOS SSLVPN service allows a […]
CISA warns of WatchGuard firewall flaw exploited in attacks
The U.S. Cybersecurity & Infrastructure Security Agency (CISA) has warned government agencies to patch an actively exploited vulnerability impacting WatchGuard Firebox firewalls. Remote attackers can use this critical security flaw (CVE-2025-9242) to execute malicious code remotely on vulnerable devices by exploiting an out-of-bounds write weakness in firewalls running Fireware OS 11.x (end of life), 12.x, and 2025.1. […]
Cisco: Actively exploited firewall flaws now abused for DoS attacks
Cisco warned this week that two vulnerabilities, which have been used in zero-day attacks, are now being exploited to force ASA and FTD firewalls into reboot loops. The tech giant released security updates on September 25 to address the two security flaws, stating that CVE-2025-20362 enables remote threat actors to access restricted URL endpoints without authentication, while CVE-2025-20333 allows authenticated attackers […]
SonicWall says state-sponsored hackers behind September security breach
SonicWall’s investigation into the September security breach that exposed customers’ firewall configuration backup files concludes that state-sponsored hackers were behind the attack. The network security company says that incident responders from Mandiant confirmed that the malicious activity had no impact on SonicWall’s products, firmware, systems, tools, source code, or customer networks. “The Mandiant investigation is now […]
SonicWall: Firewall configs stolen for all cloud backup customers
SonicWall has confirmed that all customers that used the company’s cloud backup service are affected by the security breach last month. Previously, the vendor stated that the incident “exposed firewall configuration backup files stored in certain MySonicWall accounts,” without sharing additional details. MySonicWall is an online customer portal used for managing product access, licensing, registration, […]
CISA orders agencies to patch Cisco flaws exploited in zero-day attacks
CISA has issued a new emergency directive ordering U.S. federal agencies to secure their Cisco firewall devices against two flaws that have been exploited in zero-day attacks. Emergency Directive 25-03 was issued to Federal Civilian Executive Branch (FCEB) agencies on September 25 and requires them to patch CVE-2025-20333 and CVE-2025-20362 vulnerabilities in Adaptive Security Appliance (ASA) and Firewall Threat […]
Cisco warns of ASA firewall zero-days exploited in attacks
Cisco warned customers today to patch two zero-day vulnerabilities that are actively being exploited in attacks and impact the company’s firewall software. The first one (CVE-2025-20333) allows authenticated, remote attackers to execute arbitrary code on devices running vulnerable Adaptive Security Appliance (ASA) and Firewall Threat Defense (FTD) software, while the second (CVE-2025-20362) enables remote attackers […]