All news with #zero-day tag

Maximum-severity GoAnywhere MFT zero-day exploited

⚠️ Fortra's GoAnywhere MFT is being exploited in the wild via a deserialization flaw tracked as CVE-2025-10035 in the License Servlet, enabling unauthenticated remote command injection when attackers supply a forged license response signature. WatchTowr Labs reports credible evidence of exploitation dating back to September 10, 2025, prior to Fortra's advisory published on September 18. Administrators should apply patches to 7.8.4 or 7.6.3, remove public Admin Console exposure, and search logs for the error string 'SignedObject.getObject'.

ArcaneDoor Targets Cisco ASA Firewalls in New Campaign

🔒 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.

Active Exploitation of Fortra GoAnywhere CVE-2025-10035

🔴 watchTowr Labs reports credible evidence that the critical unsafe deserialization flaw CVE-2025-10035 in Fortra GoAnywhere MFT was exploited in the wild as early as Sept 10, 2025, a week before public disclosure. The License Servlet vulnerability can permit unauthenticated command injection, earning a CVSS 10.0 rating. Fortra has released fixes (GoAnywhere 7.8.4 and Sustain 7.6.3); affected organizations should apply updates immediately and investigate for signs of compromise.

Cisco ASA Zero-Days Enable Bootkit and Loader Attacks

🛡️ 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.

Critical Cisco Firewall Zero-Day Demands Immediate Patch

🔴 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.

Urgent Cisco ASA Zero-Day Duo Under Active Attack Now

⚠️ 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 Orders Agencies to Patch Cisco ASA/FTD Zero-Days

🔔 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 warns of ASA firewall zero-days under attack

⚠️ 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 Orders Federal Agencies to Mitigate Cisco ASA Zero-Day

🛡️ 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.

Chinese Group Uses BRICKSTORM Backdoor Against US Firms

⚠️ Google Threat Intelligence Group says a Chinese-aligned cluster has used the BRICKSTORM backdoor in intrusion campaigns since at least March 2025 against US legal and technology firms, SaaS providers and outsourcing companies. Attackers focused on harvesting emails and files from key individuals and establishing long-term footholds. The group, tracked as UNC5221, exploited zero-days, deployed BRICKSTORM on VMware appliances, and used credential theft and persistence mechanisms to evade detection. Google and partners have published detection guidance and a Mandiant scanner script to help identify infections.

Cisco warns of IOS and IOS XE SNMP zero-day attacks

🛡️ 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.

Unpatched OnePlus flaw exposes SMS data to rogue apps

🔒 Rapid7 disclosed an unpatched vulnerability in OnePlus's OxygenOS (CVE-2025-10184) that allows any installed app to access SMS content and metadata without SMS permissions. The fault arises from modified Telephony content providers whose manifests omit a required write permission and accept unsanitized input. By abusing a blind SQL-injection vector an attacker can infer SMS text one character at a time. OnePlus has acknowledged the report and is investigating; users should minimize installed apps and avoid SMS-based 2FA.

Brickstorm: Long-term Go-based Backdoor Targets US Orgs

🔒 Google researchers report suspected China-linked operators used a Go-based backdoor named Brickstorm to persistently exfiltrate data from U.S. technology, legal, SaaS and BPO organizations, with an average dwell time of 393 days. Brickstorm operated as a web server, file dropper, SOCKS relay and remote command executor while masquerading traffic as legitimate cloud services and targeting edge appliances that often lack EDR. GTIG attributes the activity to UNC5221, a cluster linked to Ivanti zero-day exploitation and custom tools like Spawnant and Zipline. Mandiant published a scanner with YARA rules but cautioned it may not detect all variants or persistence mechanisms.

Weekly Recap: Chrome 0-day, AI Threats, and Supply Chain Risk

🔒 This week's recap highlights rapid attacker innovation and urgent remediation: Google patched an actively exploited Chrome zero-day (CVE-2025-10585), while researchers demonstrated a DDR5 RowHammer variant that undermines TRR protections. Dual-use AI tooling and model namespace reuse risks surfaced alongside widespread supply-chain and phishing disruptions. Defenders should prioritize patching, harden model dependencies, and monitor for stealthy loaders.

CISA Details Malware Kits Used in Ivanti EPMM Attacks

🔍 CISA released a technical analysis of malware used in attacks exploiting two Ivanti Endpoint Manager Mobile (EPMM) vulnerabilities, CVE-2025-4427 and CVE-2025-4428. The agency details two distinct malware sets that used a common web-install.jar loader and malicious listener classes to inject and execute code, exfiltrate data, and maintain persistence. Attackers targeted the /mifs/rs/api/v2/ endpoint via HTTP GET requests with a ?format= parameter, delivering segmented, Base64-encoded payloads. CISA published IOCs, YARA and SIGMA rules and advises immediate patching and treating MDM systems as high-value assets.

ShadowLeak zero-click exfiltrates Gmail via ChatGPT Agent

🔒 Radware disclosed a zero-click vulnerability dubbed ShadowLeak in OpenAI's Deep Research agent that can exfiltrate Gmail inbox data to an attacker-controlled server via a single crafted email. The flaw enables service-side leakage by causing the agent's autonomous browser to visit attacker URLs and inject harvested PII without rendering content or user interaction. Radware reported the issue in June; OpenAI fixed it silently in August and acknowledged resolution in September.

Entra ID Actor Token Flaw Lets Attackers Impersonate Admins

🔒 Researchers disclosed a max-severity vulnerability in Microsoft Entra ID that allowed attackers to request and reuse internal Actor tokens to impersonate any user, including Global Administrators, across tenants. The issue stemmed from a legacy Azure AD Graph API that failed to validate the originating tenant, enabling cross-tenant impersonation without triggering MFA, Conditional Access, or audit logs. Microsoft patched the flaw, tracked as CVE-2025-55241, and rolled a global fix but experts warn that lack of historical visibility leaves uncertainty about past exploitation.

CISA Details Two Java Loaders Exploiting Ivanti EPMM Flaws

🔒 CISA released details of two malicious toolsets found on an organization's server after attackers chained zero-day vulnerabilities in Ivanti Endpoint Manager Mobile (EPMM). Each set contains a Java loader that installs an HTTP listener to decode, decrypt and execute arbitrary payloads and maintain persistence. CISA urges updating EPMM, monitoring for suspicious activity, and restricting access to MDM systems.

Google patches sixth Chrome zero-day exploited in 2025

🔒Google has released emergency security updates to address a high-severity Chrome zero-day, CVE-2025-10585, which a public exploit indicates is being used in the wild. The vulnerability is a type confusion weakness in Chrome's V8 JavaScript engine and was reported by Google's Threat Analysis Group. Google issued emergency Stable Desktop releases — Chrome 140.0.7339.185/.186 for Windows and macOS and 140.0.7339.185 for Linux — and recommends users update immediately via Chrome menu > Help > About Google Chrome and click 'Relaunch' once the update finishes. The company also said it may withhold technical details until a majority of users have applied the fix.

Google Issues Chrome Security Update for V8 Zero-Day

⚠️ Google released security updates for Chrome to address four vulnerabilities, including a zero-day (CVE-2025-10585) in the V8 JavaScript and WebAssembly engine that is reported to be exploited in the wild. The issue is a type confusion bug discovered and reported by Google's Threat Analysis Group on September 16, 2025, and can enable arbitrary code execution or crashes. Users should update to Chrome 140.0.7339.185/.186 (Windows/macOS) or 140.0.7339.185 (Linux) and apply vendor patches for other Chromium-based browsers when available.