All news with #cisco tag

🔍 A Chinese-speaking cybercrime group tracked as UAT-8099 is hijacking trusted Microsoft IIS servers worldwide to run SEO scams that redirect users to unauthorized adverts and illegal gambling sites. According to Cisco Talos, attackers exploit server vulnerabilities, upload web shells, and conduct reconnaissance before enabling the guest account, escalating privileges and activating RDP. For persistence they deploy SoftEther VPN, EasyTier and the FRP reverse proxy and install the BadIIS malware variants designed to evade detection.

🔐 Cisco Talos recently disclosed activity by a Chinese-speaking cybercrime group tracked as UAT-8099 that compromises legitimate Internet Information Services (IIS) web servers across several countries. The actors use automation, custom malware and persistence techniques to manipulate search results for profit and to exfiltrate sensitive data such as credentials and certificates. Talos notes the group maintains long-term access and actively protects compromised hosts from rival attackers. Organizations should hunt for signs of BadIIS, unauthorized web shells and anomalous RDP/VPN activity and share IOCs promptly.

🔍 Cisco Talos details UAT-8099, a Chinese-speaking cybercrime group that compromises reputable IIS servers to conduct SEO fraud and steal high-value credentials, certificates and configuration files. The actors exploit file-upload weaknesses to deploy ASP.NET web shells, enable RDP, create hidden administrative accounts and install VPN/reverse-proxy tools for persistence. They automate operations with custom scripts, deploy Cobalt Strike via DLL sideloading and install multiple BadIIS variants to manipulate search rankings and redirect mobile users to ads or gambling sites. Talos published IoCs, Snort/ClamAV signatures and mitigation guidance.

⚠ Cisco Talos disclosed five vulnerabilities in NVIDIA's CUDA Toolkit components and one use-after-free flaw in Adobe Acrobat Reader. The Nvidia issues affect tools like cuobjdump (12.8.55) and nvdisasm (12.8.90), where specially crafted fatbin or ELF files can trigger out-of-bounds writes, heap overflows, and potential arbitrary code execution. The Adobe bug (2025.001.20531) involves malicious JavaScript in PDFs that can reuse freed objects, leading to memory corruption and possible remote code execution if a user opens a crafted document.

⚠️More than 48,800 internet-exposed Cisco ASA and FTD appliances remain vulnerable to two remotely exploitable flaws, CVE-2025-20333 and CVE-2025-20362, that allow arbitrary code execution and access to restricted VPN endpoints. Cisco confirmed active exploitation began before patches were available and no workarounds exist. Administrators should restrict VPN web interface exposure, increase logging and monitoring for suspicious VPN activity, and apply vendor fixes immediately.

🛡️ Cisco firewalls were exploited in active zero-day attacks that delivered previously undocumented malware families including RayInitiator and LINE VIPER by chaining CVE-2025-20362 and CVE-2025-20333. Infrastructure and cloud environments faced major pressure this week: Cloudflare mitigated a record 22.2 Tbps DDoS while misconfigured Docker instances enabled ShadowV2 bot operations. Researchers also disclosed Supermicro BMC flaws that could allow malicious firmware implants, and ransomware actors increasingly abuse exposed AWS keys. Prioritize patching, firmware updates, and cloud identity hygiene now.

🔒 A Chinese state-sponsored group tracked as RedNovember carried out a global espionage campaign from June 2024 to July 2025, compromising defense contractors, government agencies, and major corporations by exploiting internet-facing network appliances. The attackers rapidly weaponized disclosed flaws in devices from SonicWall, Ivanti, Cisco, F5, Sophos, and Fortinet, often within 72 hours of public exploit code. They deployed Go-based tools including Pantegana, Cobalt Strike, and SparkRAT, and relied on open-source tooling and legitimate services to obfuscate attribution and maintain persistent access.

⚠️ CISA added five vulnerabilities to its Known Exploited Vulnerabilities (KEV) Catalog on Sept. 29, 2025, citing evidence of active exploitation. The newly listed issues are CVE-2021-21311 (Adminer SSRF), CVE-2025-20352 (Cisco IOS/IOS XE stack overflow), CVE-2025-10035 (Fortra GoAnywhere deserialization), CVE-2025-59689 (Libraesva command injection), and CVE-2025-32463 (sudo untrusted-control vulnerability). Federal Civilian Executive Branch agencies must remediate these under BOD 22-01, and CISA urges all organizations to prioritize timely fixes as part of standard vulnerability management.

⚠️ Cisco reported active exploitation of multiple zero-day vulnerabilities in ASA and FTD software by a state-sponsored actor tracked as ArcaneDoor. Two CVEs (CVE-2025-20333 and CVE-2025-20362) are being exploited in the wild and a third (CVE-2025-20363) is at high risk for imminent exploitation. Cisco released updates on Sep. 25, 2025, and CISA issued Emergency Directive 25-03; organizations should prioritize immediate patching or apply vendor mitigations when updates are not yet possible.

🔒 Cisco has linked a renewed campaign exploiting Cisco ASA 5500-X devices to the espionage-focused ArcaneDoor threat actor. The operation leveraged zero-day flaws, notably CVE-2025-20333 and CVE-2025-20362, to implant malware, modify ROMMON for persistence and evade detection by disabling logging and intercepting CLI commands. Observed compromises affected older ASA models lacking Secure Boot/Trust Anchor protections; Cisco and national authorities urge immediate remediation. Temporary mitigations include disabling SSL/TLS VPN web services and IKEv2 client services while applying vendor fixes and conducting forensics.

🛡️ The U.K. NCSC and Cisco confirmed active exploitation of recently disclosed vulnerabilities in Cisco Secure Firewall ASA devices that allowed deployment of previously undocumented malware families, notably RayInitiator and LINE VIPER. Cisco traced attacks beginning in May 2025 that targeted ASA 5500‑X appliances (running ASA 9.12/9.14 with VPN web services enabled), using multiple zero-day flaws to bypass authentication and execute code. Attackers employed a persistent GRUB bootkit, ROMMON modifications on non‑Secure Boot platforms, and extensive evasion techniques — disabling logging, intercepting CLI, and crashing devices — to maintain stealth and persistence. Organizations are urged to apply vendor fixes, migrate off end‑of‑support models, and monitor for indicators of compromise.

🔴 A critical zero-day vulnerability (CVE-2025-20363) in Cisco firewall and IOS families requires immediate patching, US CISA and the UK NCSC warned. Cisco says the flaw is caused by improper validation of user-supplied HTTP input and can allow remote arbitrary code execution as root when exploited. Affected products include Cisco Secure Firewall ASA, FTD, and certain IOS/IOS XE/IOS XR builds; Cisco has released fixes and advises there are no viable workarounds.

⚠️ Cisco has warned of a stack overflow vulnerability in the SNMP subsystem of IOS and IOS XE software identified as CVE-2025-20352. A low-privileged authenticated attacker can send a crafted SNMP packet to cause a system reload and a denial-of-service, while a high-privileged actor could achieve root-level arbitrary code execution. Administrators are urged to apply vendor patches immediately and restrict SNMP access until systems are updated.

⚠️ Cisco is urging customers to immediately patch two zero-day vulnerabilities affecting the VPN web server in Cisco Secure Firewall Adaptive Security Appliance (ASA) and FTD software after observing exploitation in the wild. CVE-2025-20333 (CVSS 9.9) allows an authenticated VPN user to execute arbitrary code as root; CVE-2025-20362 (CVSS 6.5) permits unauthenticated access to restricted URL endpoints. CISA has issued Emergency Directive ED 25-03, added both flaws to the Known Exploited Vulnerabilities catalog with a 24-hour mitigation requirement, and warned of a widespread campaign linked to the ArcaneDoor/UAT4356 cluster that can modify ASA ROM to persist.

🔔 CISA has issued Emergency Directive 25-03 requiring Federal Civilian Executive Branch agencies to remediate two actively exploited Cisco vulnerabilities, CVE-2025-20333 and CVE-2025-20362, in ASA and FTD devices. Agencies must inventory appliances, collect forensics, disconnect compromised and end-of-support devices, and apply patches by the stated deadlines. Cisco links the exploitation to the ArcaneDoor campaign, which leverages ROMMON manipulation and in-memory backdoors to maintain persistence.

⚠️ Cisco has warned customers of two actively exploited zero-day vulnerabilities affecting Adaptive Security Appliance (ASA) and Firewall Threat Defense (FTD) software. CVE-2025-20333 enables authenticated attackers to execute arbitrary code remotely, while CVE-2025-20362 allows remote access to restricted URL endpoints without authentication. Cisco's PSIRT reported attempted exploitation and strongly recommends upgrading to fixed software releases.

🛡️ CISA issued Emergency Directive 25-03 directing federal civilian agencies to identify and mitigate exploitation of a zero-day affecting Cisco Adaptive Security Appliances (ASA). Agencies must inventory in-scope devices, collect forensic data, and assess compromises using CISA-provided procedures and tools. End-of-support devices must be disconnected and remaining appliances upgraded by 11:59 PM EST on September 26, 2025; CISA will monitor compliance and provide assistance.

🚨 CISA issued Emergency Directive ED 25-03 directing federal agencies to identify, analyze, and mitigate potential compromises of Cisco ASA and Cisco Firepower devices after adding CVE-2025-20333 and CVE-2025-20362 to the Known Exploited Vulnerabilities Catalog. Agencies must inventory all devices (all versions) and collect memory/core dump files for forensic analysis, transmitting them to CISA by 11:59 p.m. EST on Sept. 26. CISA published supplemental guidance, an Eviction Strategies Tool template, and referenced Cisco and UK NCSC analyses to support containment, eviction, and remediation.

🔒 Cisco has issued an urgent advisory about a high-severity SNMP vulnerability (CVE-2025-20352, CVSS 7.7) in IOS and IOS XE Software that has been exploited in the wild. The flaw is a stack overflow in the SNMP subsystem that can allow an authenticated remote attacker to cause a denial-of-service or, with higher privileges, execute arbitrary code as root. Exploitation requires SNMP community strings or valid SNMPv3 credentials and, for code execution, administrative (privilege 15) access. Cisco called out affected devices including Meraki MS390 and Catalyst 9300 series running Meraki CS 17 and earlier, and issued a fix in IOS XE 17.15.4a. There are no full workarounds; administrators should restrict SNMP access, monitor with "show snmp host", and consider excluding affected OIDs where supported.

🛡️ Cisco released security updates addressing a high-severity zero-day, tracked as CVE-2025-20352, in IOS and IOS XE. The flaw is a stack-based buffer overflow in the SNMP subsystem that allows authenticated remote attackers with low privileges to trigger DoS, and high-privileged actors to execute code as root on affected devices. Cisco reports exploitation in the wild after Administrator credentials were compromised and urges customers to upgrade; as a temporary mitigation it recommends limiting SNMP access to trusted users.