All news with #active exploitation tag

⚠ AVEVA's PI Data Archive contains an uncaught-exception vulnerability (CVE-2026-1507) that can allow an unauthenticated remote attacker to crash PI core services and cause denial of service. Affected versions include PI Server <=2018_SP3_Patch_7, 2023 (including 2023_Patch_1), and 2024. The issue has a CVSS 3.1 base score of 7.5 (High). AVEVA recommends upgrading to PI Server 2024 R2 or applying vendor patches and restricting inbound access to TCP port 5450.

🔒 SmarterTools confirmed a network breach by the Warlock (aka Storm-2603) ransomware group after attackers exploited an unpatched SmarterMail instance on January 29, 2026. A single, unpatched VM allowed lateral movement to about a dozen Windows servers across the office network and a secondary QC data center, with hosted SmarterTrack customers most affected. Operators staged tools including Velociraptor and deployed a locker after gaining Active Directory control. SmarterTools urges immediate upgrade to Build 9526 and isolation of mail servers to limit further ransomware deployment.

⚠️ Researchers report attackers exploiting critical SolarWinds Web Help Desk (WHD) remote code execution flaws (CVE-2025-40551 and CVE-2025-26399) to gain access to at least three organizations. After initial compromise the actor installed Zoho ManageEngine Assist and used Cloudflare tunnels alongside an outdated Velociraptor build as a command-and-control platform. The intruders disabled Defender and the Windows Firewall, deployed persistence mechanisms including scheduled tasks and SSH backdoors, and researchers advise upgrading WHD to 2026.1, removing public admin exposure, and rotating credentials.

🔒 Microsoft reported a multi-stage intrusion that exploited internet‑exposed SolarWinds Web Help Desk instances to gain unauthenticated remote code execution and lateral access. Exploitation spawned PowerShell which used BITS to download payloads, and attackers deployed legitimate Zoho ManageEngine components to maintain persistent remote control. They enumerated domain users, established reverse SSH and RDP persistence, performed DLL side‑loading to dump LSASS, and in at least one case executed a DCSync. Organizations are advised to patch WHD, remove unauthorized RMM tools, rotate service and admin credentials, and isolate compromised systems.

⚠️ Microsoft Defender observed in-the-wild exploitation of internet-facing SolarWinds Web Help Desk, enabling unauthenticated remote code execution and arbitrary command execution within the application context. Post-exploitation behaviors included PowerShell using BITS to download payloads, installation of ManageEngine RMM components for interactive control, credential theft via DLL sideloading and LSASS access, and persistence through scheduled tasks and reverse SSH/RDP tunnels. Organizations should patch WHD, restrict public admin access, hunt for unauthorized RMM artifacts, and rotate exposed service and admin credentials.

⚠️ CISA warns that ransomware actors are actively exploiting CVE-2026-24423, a critical unauthenticated remote code execution vulnerability in SmarterTools SmarterMail via the ConnectToHub API. SmarterTools released a fix on January 15 (Build 9511) and issued further updates through Build 9526 on January 30. Agencies must apply updates or stop using the product by February 26, 2026, under KEV and BOD 22-01 guidance.

⚠️ CISA added two vulnerabilities to its Known Exploited Vulnerabilities (KEV) Catalog: CVE-2025-11953 (React Native Community CLI OS command injection) and CVE-2026-24423 (SmarterTools SmarterMail missing authentication for critical function). The additions reflect evidence of active exploitation and elevated risk to the federal enterprise. Under BOD 22-01 federal agencies must remediate KEV entries by the due date. CISA strongly urges all organizations to prioritize timely remediation.

🔒 Check Point researchers say attackers rapidly weaponized CVE-2025-8088, a path traversal flaw in the Microsoft Windows version of WinRAR, to deliver crafted archives that execute arbitrary code and maintain persistence. The campaign used the open-source Havoc Framework and targeted government and law-enforcement organisations in Southeast Asia. Check Point attributes the activity to a group dubbed Amaranth-Dragon, whose tools and tactics resemble APT41. Organisations are advised to prioritise patching and monitor for suspicious archive files.

⚠️ Researchers at Datadog Security Labs report threat actors are exploiting the React2Shell vulnerability (CVE-2025-55182) in React 19 to execute code on servers and then target NGINX instances managed with Boato Panel, focusing on several Asian TLDs and Chinese hosting. Attackers use automated, multi-stage toolkits to discover targets, persist, and write malicious NGINX configs that redirect traffic for cryptomining, credential phishing, or malware delivery. Defenses include prompt patching, locking down configuration files, maintaining configuration records, and monitoring NGINX advisories.

⚠️ Researchers at Datadog Security Labs report that threat actors are exploiting the React2Shell vulnerability to compromise servers running NGINX managed via Boato Panel and to hijack web traffic. Attackers deploy multi-stage scripts that discover targets, establish persistence, and generate malicious configuration files to redirect users or deliver malware. The campaign targets primarily Asian domains and Chinese hosting infrastructure, and unpatched React server components remain at high risk.

⚠️ CISA has ordered federal agencies to patch a five-year-old GitLab SSRF vulnerability (CVE-2021-39935) that is currently being exploited in attacks. GitLab issued a fix for the server-side request forgery bug in December 2021 after it was found that unauthenticated users could reach the CI Lint API when user registration was restricted. Under BOD 22-01, affected Federal Civilian Executive Branch agencies must remediate by February 24, 2026, and CISA urges all organizations to prioritize mitigation. Shodan currently identifies over 49,000 internet-exposed GitLab instances, many reachable on default ports.

🔒 A custom EDR killer discovered by Huntress abused a long-revoked EnCase kernel driver to gain kernel-level access and repeatedly terminate security processes. The 64-bit tool leverages EnPortv.sys, registers as a fake OEM service for reboot persistence, and uses a kernel IOCTL kill loop to disable 59 EDR/AV processes every second. Huntress links the activity to ransomware and recommends MFA, HVCI/Memory Integrity, WDAC, and monitoring for OEM-masquerading kernel services.

🛡️ Security researchers at ZScaler ThreatLabz observed Operation Neusploit in January 2026, days after Microsoft patched CVE-2026-21509. The campaign used weaponized RTF attachments to trigger a critical Microsoft Office vulnerability and fetch dropper DLLs that branched into two distinct infection paths. One path deployed MiniDoor to harvest Outlook email and weaken registry protections, while the other used PixyNetLoader to install a Covenant Grunt implant for persistent .NET-based C2. ZScaler urged immediate patching and published IOCs and analysis to aid detection.

⚠️ The US Cybersecurity and Infrastructure Security Agency (CISA) has added CVE-2025-40551 — a critical remote code execution flaw in SolarWinds Web Help Desk — to its Known Exploited Vulnerabilities catalog after reports of active exploitation. The vendor patched multiple high-severity bugs on January 28 and assigned CVSS scores of 9.8. Administrators are urged to apply the vendor update to Web Help Desk 2026.1 immediately to mitigate unauthenticated deserialization and authentication-bypass risks.

🔎 GreyNoise observed a coordinated reconnaissance campaign from Jan 28–Feb 2 that used tens of thousands of residential proxies to discover Citrix NetScaler/Citrix Gateway login panels and enumerate product versions. Over 63,000 distinct IPs launched 111,834 sessions, with roughly 64% appearing as residential ISP addresses and the remainder linked to a single Azure IP. The scans concentrated on /logon/LogonPoint/index.html and the EPA artifact /epa/scripts/win/nsepa_setup.exe, indicating pre‑exploitation mapping and version‑specific probing. GreyNoise recommends monitoring anomalous UA strings, flagging EPA artifact access, restricting internet‑facing Gateways, and disabling version disclosure.

⚠️ Sysdig researchers observed an AI-assisted intrusion in November 2025 that converted exposed AWS credentials in a public S3 bucket into full administrative control in under eight minutes. The attackers exploited an IAM user with Lambda and limited Amazon Bedrock access, injected malicious code into an existing Lambda function, and generated admin keys from the function output. They then moved laterally across multiple principals, invoked multiple foundation models (LLMjacking), disabled model-invocation logging, and attempted to provision costly GPU instances to run ML workloads. Sysdig recommends enforcing least privilege, restricting UpdateFunctionCode and PassRole, protecting S3 buckets, enabling Lambda versioning, and turning on Bedrock logging.

🔒 VulnCheck observed active exploitation of CVE-2025-11953 (Metro4Shell), a critical RCE in the @react-native-community/cli Metro Development Server first seen on December 21, 2025. With a CVSS score of 9.8, the flaw enables unauthenticated remote command execution and was weaponized to deliver a Base64-encoded PowerShell loader that adds Microsoft Defender exclusions. The loader opens a raw TCP channel to 8.218.43.248:60124 to fetch and execute a Rust-based binary with anti-analysis checks; VulnCheck links the activity to multiple attacker IPs and describes it as operational exploitation.

🚨 Researchers report attackers are exploiting CVE-2025-11953 in the React Native Metro server to deliver malicious, cross-platform payloads to developer machines. The vulnerability stems from the /open-url endpoint accepting POST data that is passed unsanitized to the system open() call, enabling command execution on Windows and arbitrary executable launches on Unix-like hosts. JFrog disclosed the flaw in early November and it was fixed in @react-native-community/cli-server-api 20.0.0 and later, but active exploitation tracked as 'Metro4Shell' has been observed delivering base64-encoded payloads for both Windows and Linux.

🔓 Security researchers warn that attackers are exploiting the critical CVE-2025-11953 flaw in the React Native Metro server to drop malicious Windows and Linux payloads. The issue abuses the development-only /open-url HTTP endpoint, which accepts POST requests and can pass a user-supplied URL unsanitized to the system open() call. JFrog disclosed the bug and it was fixed in @react-native-community/cli-server-api v20.0.0+, but active exploitation (Metro4Shell) has been observed delivering base64 PowerShell stagers and UPX-packed binaries.

🔒 CISA has added four vulnerabilities to the Known Exploited Vulnerabilities (KEV) Catalog: CVE-2019-19006 (Sangoma FreePBX improper authentication), CVE-2021-39935 (GitLab SSRF), CVE-2025-40551 (SolarWinds Web Help Desk deserialization), and CVE-2025-64328 (Sangoma FreePBX OS command injection). Evidence indicates active exploitation and these issues pose significant risk to the federal enterprise. Under BOD 22-01, Federal Civilian Executive Branch agencies must remediate KEV items by required deadlines. CISA strongly urges all organizations to prioritize timely remediation and will continue updating the catalog.