BrunnerCTF 2026 Easy Boot2Root

Brunner Mifflin (Root)

IT terminal creds + sudo NOPASSWD on /usr/bin/mail. GTFOBins payload spawns a root shell for the flag.

#BrunnerCTF2026#Boot2Root#Easy#Sudo#Mail#GTFOBins
BrunnerCTF 2026 Easy Boot2Root

Brunner Mifflin (User)

IDOR + broken access control in an HR web app. Manipulate a client-side role in localStorage to unlock admin access and grab the flag.

#BrunnerCTF2026#Boot2Root#Easy#IDOR#BrokenAccessControl
HACKTHEBOX CA26 Very-Easy FOR

Force Push

A force-push hid a commit, but ORIG_HEAD and the dangling object survived. Recovered the leaked reliquary credentials.

#CyberApocalypse2026#Forensics#Very-Easy#Recover#Git#force-push
HACKTHEBOX CA26 Very-Easy FOR

The Compressed Truth

Analyzing NTUSER.DAT hives with RegRipper to trace CROWQUILL's stolen-credential access to vmarr's machine, uncovering KeeFarce credential theft and a staged/exfiltrated archive via 7-Zip artifacts.

#CyberApocalypse2026#Forensics#Very-Easy#Registry#RegRipper#KeeFarce#KeePass
HACKTHEBOX CA26 Very-Easy WEB

Massagold

Stored XSS via unescaped EJS output, CSP bypassed using a Google JSONP endpoint, payload delivered to an admin bot that exfiltrated the flag from the admin inbox back to us.

#CyberApocalypse2026#Web#Very-Easy#Stored-XSS#CSP-Bypass
HACKTHEBOX CA26 Very-Easy WEB

Gatery

An Elysia backend's signed session cookie fails to verify signatures (CVE-2025-66457), letting a forged session=inside cookie bypass auth.

#CyberApocalypse2026#Web#Very-Easy#CVE-2025-66457#Elysia
HACKTHEBOX CA26 Easy ICS

Line Tap

Fingerprinted a Telnet service running vulnerable GNU InetUtils telnetd, exploited CVE-2026-24061 via USER env injection to bypass auth and grab root shell + flag.

#CyberApocalypse2026#ICS#Easy#CVE-2026-24061#InetUtils
HackTheBox Easy Windows

Baby

Anonymous LDAP enumeration exposes domain users. Password spraying identifies a second account. SeBackupPrivilege is abused to extract ntds.dit, leading to a full domain compromise via Pass-the-Hash.

#Windows#Easy#AD#Password-Spraying#LDAP#ldapsearch#SMB#smbpasswd#WinRM#Evil-WinRM
HackTheBox Easy Linux

Conversor

An unsanitized XSLT parser allows arbitrary file writes for RCE. Credentials are recovered from a SQLite database. A Perl config injection grants a root shell.

#Linux#Easy#FTP#SQLite#XSLT-Injection#Linpeas#Hash-Identifier#Hashcat#needrestart#Perl
HackTheBox Easy Linux

WingData

A null-byte injection CVE-2025-47812. Credentials for a second user are recovered from config files. A symlink and hardlink chaining technique CVE-2025-4517.

#Linux#Easy#Python#FTP#Injection#CVE-2025-47812#CVE-2025-4517#Hash-Identifier#Hashcat