TLDR InfoSec

TLDR INFORMATION SECURITY 2026-02-10

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01GENERAL

02ATTACKS & VULNERABILITIES

BREAKING DOWN CVE-2026-25049: HOW TYPESCRIPT TYPES FAILED N8N'S SECURITY

CVE-2026-25049 (CVSS 9.4) exploits a type confusion flaw in n8n's expression evaluator, bypassing a prior security patch by sending object inputs instead of strings — since TypeScript types are stripped at compile-time, the runtime sanitizer never executed. Attackers use JavaScript destructuring to access the Function constructor and achieve unauthenticated RCE via public webhook endpoints, exposing stored credentials, API keys, and internal network access. Users should upgrade to n8n versions 1.123.17 or 2.5.2 and implement runtime type validation using typeof checks or a schema validation library such as Zod.

hetmehta.com8 min read

EUROPEAN COMMISSION DISCLOSES BREACH THAT EXPOSED STAFF DATA

The European Commission is investigating a breach after finding evidence that its mobile device management (MDM) platform was hacked. It has not found any evidence that mobile devices were compromised, but confirmed that attackers have accessed some staff members' personal information, such as names and phone numbers. The European Commission did not disclose how the attackers compromised its MDM system, but the attack shows similarities with other attacks on European institutions that exploit vulnerabilities in Ivanti Endpoint Manager Mobile software.

bleepingcomputer.com2 min read

BEYONDTRUST WARNS OF CRITICAL RCE FLAW IN REMOTE SUPPORT SOFTWARE

BeyondTrust warned customers to patch a critical vulnerability in its Remote Support and Privileged Remote Access software that could allow unauthenticated attackers to execute arbitrary code via OS command injection. The vulnerability can be exploited by unauthenticated attackers without requiring user interaction by sending specially crafted client requests. BeyondTrust has secured all cloud systems and advises all on-premises customers to patch their systems manually if they haven't enabled auto updates.

bleepingcomputer.com2 min read

03STRATEGIES & TACTICS

THE PHANTOM FILE SYSTEM: INSIDE THE WINDOWS PROJFS

The Windows Projected File System (ProjFS) operates as a minifilter (prjflt.sys) rather than a true filesystem, using reparse points and filter communication ports to project virtual files on demand. Offensively, medium-integrity users can launch ProjFS providers without admin privileges, prevent higher-privileged processes from deleting files, and serve different file contents per process — all potential avenues for evasion and persistence. Defensively, ProjFS offers a lightweight alternative to custom minifilters for deploying canary files with rich callback data, including triggering process ID and image path, particularly relevant as Microsoft moves toward reducing kernel-mode dependencies.

huntress.com14 min read

UNCOVERING THREATS THROUGH WAF LOGS: A THREAT HUNTER'S LENS

WAF logs are often overlooked in threat hunting because every request must pass through them. Defenders can look for potential reconnaissance patterns, including using non-standard HTTP methods on public pages, CMS helper endpoint exposure, systematic enumeration across multiple sites, and infrastructure-based anomalies such as TOR exit nodes. The article also includes KQL queries for practical threat detection.

links.tldrnewsletter.com5 min read

04LAUNCHES & TOOLS

PHANTOMFS

PhantomFS is a Windows ProjFS-based tool that projects virtual files whose content varies by the requesting process, serving AES-256-CBC-encrypted payloads to allowed processes (e.g., cmd.exe) while returning decoy bytes to all others. Inspired by Huntress' recent ProjFS research, the tool runs at medium integrity without admin privileges and blocks delete/rename attempts from non-allowed processes. Detection is possible via ProjFS reparse points, the PrjFlt minifilter at filter altitude 189800, and the Microsoft-Windows-ProjFS ETW provider.

github.comGitHub repository

EVILNEKO

EvilNeko is a project to automate container orchestration and operationalize Browser in Browser attacks for red teams.

github.comGitHub repository

IDONTLIKEFILELOCKS

IDontLikeFileLocks is a tool that dumps locked browser databases.

github.comGitHub repository

05MISCELLANEOUS

17% OF 3RD-PARTY ADD-ONS FOR OPENCLAW USED IN CRYPTO THEFT AND MACOS MALWARE

17% of third-party "skills" for the popular open-source AI tool OpenClaw, which has over 160,000 GitHub stars, are malicious. Over half (54%) of these threats target cryptocurrency users with fake wallet trackers, DEX tools, and Solana/Phantom utilities. One user account, sakaen736jih, is associated with 199 malicious skills that steal private wallet keys and deploy AMOS Stealer malware on macOS. The malware campaign has extended into corporate settings, leading Bitdefender to develop a free AI Skills Checker tool to help users vet add-ons before installing.

hackread.com2 min read

MY TOP 5 RECOMMENDATIONS ON OT CYBERSECURITY STUDENT UPSCALING

A guide from Lesley Carhart, aka hacks4pancakes, on the skills prospective Operational Technology (OT) students should focus on. Students should focus more on processes and systems of systems rather than hacking individual devices. Start with one process, consider safety and process continuity, since most OT engagements involve critical systems, and get comfortable with older computers. The post also includes a list of free learning resources.

tisiphone.net3 min read