cisco
Cisco warns of IOS zero-day vulnerability exploited in attacks
Cisco has released security updates to address a high-severity zero-day vulnerability in Cisco IOS and IOS XE Software that is currently being exploited in attacks. Tracked as CVE-2025-20352, the flaw is due to a stack-based buffer overflow weakness found in the Simple Network Management Protocol (SNMP) subsystem of vulnerable IOS and IOS XE software, impacting […]
Surge in networks scans targeting Cisco ASA devices raise concerns
Large network scans have been targeting Cisco ASA devices, prompting warnings from cybersecurity researchers that it could indicate an upcoming flaw in the products. GreyNoise has recorded two significant scanning spikes in late August, with up to 25,000 unique IP addresses probing ASA login portals and also Cisco IOS Telnet/SSH. The second wave, logged on August 26, 2025, was […]
FBI warns of Russian hackers exploiting 7-year-old Cisco flaw
The Federal Bureau of Investigation (FBI) has warned that hackers linked to Russia’s Federal Security Service (FSB) are targeting critical infrastructure organizations in attacks exploiting a 7-year-old vulnerability in Cisco devices. The FBI’s public service announcement states that the state-backed hacking group, linked to the FSB’s Center 16 unit and tracked as Berserk Bear (also known as […]
Cisco warns of max severity flaw in Firewall Management Center
Cisco is warning about a critical remote code execution (RCE) vulnerability in the RADIUS subsystem of its Secure Firewall Management Center (FMC) software. Cisco FCM is a management platform for the vendor’s Secure Firewall products, which provides a centralized web or SSH-based interface to allow administrators to configure, monitor, and update Cisco firewalls. RADIUS in FMC […]
Cisco discloses data breach impacting Cisco.com user accounts
Cisco has disclosed that cybercriminals stole the basic profile information of users registered on Cisco.com following a voice phishing (vishing) attack that targeted a company representative. After becoming aware of the incident on July 24th, the networking equipment giant discovered that the attacker tricked an employee and gained access to a third-party cloud-based Customer Relationship […]
Exploit available for critical Cisco ISE bug exploited in attacks
Security researcher Bobby Gould has published a blog post demonstrating a complete exploit chain for CVE-2025-20281, an unauthenticated remote code execution vulnerability in Cisco Identity Services Engine (ISE). The critical vulnerability was first disclosed on June 25, 2025, with Cisco warning that it impacts ISE and ISE-PIC versions 3.3 and 3.4, allowing unauthenticated, remote attackers to […]
Cisco: Maximum-severity ISE RCE flaws now exploited in attacks
Cisco is warning that three recently patched critical remote code execution vulnerabilities in Cisco Identity Services Engine (ISE) are now being actively exploited in attacks. Although the vendor did not specify how they were being exploited and whether they were successful, applying the security updates as soon as possible is now critical. “In July 2025, the […]
Max severity Cisco ISE bug allows pre-auth command execution, patch now
A critical vulnerability (CVE-2025-20337) in Cisco’s Identity Services Engine (ISE) could be exploited to let an unauthenticated attacker store malicious files, execute arbitrary code, or gain root privileges on vulnerable devices. The security issue received the maximum severity rating, 10 out of 10, and is caused by insufficient user-supplied input validation checks. It was discovered by Kentaro Kawane, a researcher […]
Cisco warns that Unified CM has hardcoded root SSH credentials
Cisco has removed a backdoor account from its Unified Communications Manager (Unified CM), which would have allowed remote attackers to log in to unpatched devices with root privileges. Cisco Unified Communications Manager (CUCM), formerly known as Cisco CallManager, serves as the central control system for Cisco’s IP telephony systems, handling call routing, device management, and […]
Cisco warns of max severity RCE flaws in Identity Services Engine
Cisco has published a bulletin to warn about two critical, unauthenticated remote code execution (RCE) vulnerabilities affecting Cisco Identity Services Engine (ISE) and the Passive Identity Connector (ISE-PIC). The flaws, tracked under CVE-2025-20281 and CVE-2025-20282, are rated with max severity (CVSS score: 10.0). The first impacts ISE and ISE-PIC versions 3.4 and 3.3, while the second affects only […]