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Introduction:
For decades, there has been a gap between finding a vulnerability and sharing it with the world. In 2026, that gap has collapsed from months to mere hours — and for many organizations, it’s already too late. Security researcher André Baptista (0xacb), co-founder of Ethiack and two-time winner of the “Most Valuable Hacker” title, has spent his career proving that finding vulnerabilities is only half the battle; the real challenge lies in bridging the communication and remediation gap before attackers exploit it.
Learning Objectives:
- Understand the widening gap between vulnerability discovery, disclosure, and exploitation
- Learn how AI-assisted research is accelerating both discovery and weaponization
- Master practical Linux and Windows commands for attack surface mapping and vulnerability validation
- Explore automated tools and frameworks for continuous security assessment
- Develop a strategic approach to coordinated vulnerability disclosure in the zero-hour era
You Should Know:
1. The Disclosure-Exploitation Gap Has Gone Negative
The traditional vulnerability management model assumed a positive gap between disclosure and exploitation — time for patches to be developed, tested, and deployed. That assumption is now dangerously obsolete. Rapid7’s 2026 Global Threat Landscape Report found that exploited high and critical severity vulnerabilities more than doubled year over year, increasing 105% from 71 in 2024 to 146 in 2025. The window between vulnerability publication and confirmed exploitation continues to shrink, with attackers operationalizing vulnerabilities within days — sometimes hours — of disclosure.
Even more alarming: Mandiant’s M-Trends 2026 report found that 28.3% of CVEs are now exploited within 24 hours of public disclosure. CrowdStrike’s 2026 Global Threat Report documents a 42% increase in zero-day vulnerabilities exploited prior to public disclosure. The mean time to exploit has effectively gone negative — attackers are weaponizing vulnerabilities before the security community even knows they exist.
This is the gap 0xacb has been warning about. As he demonstrated in his work with Ethiack — a company building a revolutionary product in autonomous ethical hacking and continuous attack surface management — the solution isn’t just finding more vulnerabilities. It’s finding them faster, sharing them smarter, and automating the remediation pipeline.
Step-by-Step: Mapping Your Attack Surface Like 0xacb
Before you can close the disclosure gap, you need to know what you‘re protecting. Here’s how to map your external attack surface using tools and techniques similar to those used by top bug hunters:
Linux/Unix Attack Surface Discovery:
Discover live hosts and open ports nmap -sS -sV -p- -T4 --min-rate=1000 target.com Enumerate subdomains (passive reconnaissance) subfinder -d target.com -o subdomains.txt amass enum -passive -d target.com -o amass_subs.txt Resolve subdomains to IP addresses cat subdomains.txt | httpx -silent -o live_hosts.txt Map ASN and IP ranges (as used by Asnip tool) whois -h whois.radb.net -- '-i origin ASxxxxx' | grep route Identify exposed cloud assets cloud_enum -k target.com -l target_cloud.txt
Windows PowerShell Attack Surface Discovery:
Port scanning with Test-1etConnection
1..1024 | ForEach-Object { Test-1etConnection -ComputerName target.com -Port $_ -WarningAction SilentlyContinue }
DNS enumeration
Resolve-DnsName target.com -Type A
Resolve-DnsName target.com -Type MX
Resolve-DnsName target.com -Type TXT
Active Directory enumeration (internal)
Get-ADComputer -Filter | Select-Object Name, OperatingSystem
Get-ADUser -Filter | Select-Object SamAccountName, Enabled
Network route discovery
tracert target.com
- AI Is Rewriting the Vulnerability Equation — For Both Sides
AI-assisted research is dramatically reshaping the vulnerability landscape. The FIRST 2026 Vulnerability Forecast links sharp year-over-year disclosure increases at major software suppliers directly to AI-assisted research: Chrome is up 563%, VMware up 181%, Apache up 170%, and Mozilla up 157%. Total disclosed vulnerabilities have risen from roughly 21,000 in 2021 to nearly 50,000 in 2025.
But here‘s the catch: AI vulnerability research and discovery capabilities are improving, but they have not changed the fundamentals of vulnerability management. Finding more vulnerabilities means nothing if you can’t prioritize, communicate, and remediate them faster than attackers can weaponize them.
The numbers are brutal. Since January 2025, 55.7% of critical vulnerabilities never received a detection signature at all. Of the 44.3% that did get a signature, 62% had exploits circulating BEFORE the signature shipped to the scanner. Legacy scanners are already too slow for today‘s exploits.
This is where 0xacb’s approach to continuous security becomes critical. Rather than relying on periodic scans, modern security requires autonomous, continuous attack surface management — the very product Ethiack is building.
Step-by-Step: Automating Vulnerability Discovery and Validation
Using REcollapse for Regex Fuzzing (0xacb‘s Tool):
REcollapse is a black-box regex fuzzing tool that helps bypass validations and discover normalizations in web applications:
Install REcollapse pip3 install recollapse Basic usage - fuzz an input with all modes recollapse -m 1,2,3,4,5,6,7 -e 1 "user_input" Fuzz with URL encoding and custom byte range recollapse -m 1,2,3 -e 1 -r 0x00,0xff "admin" Generate payloads for Burp Intruder or ffuf recollapse -m 1,2,3,4,5 -e 1 "target_string" > payloads.txt Use with ffuf for automated fuzzing ffuf -u https://target.com/FUZZ -w payloads.txt -c -t 50
Using Nuclei for Vulnerability Scanning:
Install Nuclei go install -v github.com/projectdiscovery/nuclei/v3/cmd/nuclei@latest Run all templates against a target nuclei -u https://target.com -t ~/nuclei-templates/ -severity critical,high Run specific CVE checks nuclei -u https://target.com -t ~/nuclei-templates/cves/ -tags cve Output results in JSON for automation nuclei -u https://target.com -t ~/nuclei-templates/ -json -o results.json
Windows PowerShell for Vulnerability Validation:
Check for missing patches (requires PSWindowsUpdate module)
Get-WUList | Where-Object { $_.IsInstalled -eq $false } | Select-Object , KB
Check SSL/TLS vulnerabilities
Invoke-WebRequest -Uri https://target.com -SkipCertificateCheck -UseBasicParsing
Test for common misconfigurations using Test-SecureConnection
Test-SecureConnection -ComputerName target.com -Port 443
Export system inventory for vulnerability correlation
Get-HotFix | Export-Csv -Path hotfixes.csv -1oTypeInformation
3. The Coordinated Vulnerability Disclosure Crisis
The traditional Coordinated Vulnerability Disclosure (CVD) model assumes a collaborative process where reporters and vendors work privately to resolve vulnerabilities before public disclosure. But in 2026, this model is breaking down.
Security researchers have documented a pattern of vulnerability reports to AI platform vendors that result in no CVE assignment, no public advisory, and no coordinated disclosure — what the Cloud Security Alliance terms the “silent bounty” problem. Meanwhile, the Coverage Gap — the measurable distance between observable public exposure of critical-infrastructure operators and their declared capability to coordinate vulnerability disclosure — continues to widen.
0xacb‘s own work exemplifies the solution. When he discovered a weird behavior on GitHub with submodule URLs that would crash repository pages during HackerOne bug bounties, he didn’t just report it — he worked with the vendor to ensure proper remediation. His team‘s discoveries in the Las Vegas competition, finding critical vulnerabilities in TikTok and Epic Games, were similarly resolved and corrected with his direct support.
Step-by-Step: Building a Coordinated Disclosure Workflow
Linux Tools for Responsible Disclosure Documentation:
Capture full request/response for vulnerability proof curl -v -X GET "https://target.com/vulnerable-endpoint" \ -H "User-Agent: Security-Research" \ -o response.txt 2> headers.txt Generate a security advisory template cat > advisory_template.md << 'EOF' Security Advisory: [VULNERABILITY NAME] Summary [Brief description] Affected Products - Product: [bash] - Versions: [affected versions] Impact [CVSS score and description] Reproduction Steps 1. [Step 1] 2. [Step 2] Mitigation [Recommended fixes] Timeline - [bash] Discovery - [bash] Vendor notification - [bash] Public disclosure Credits - [Researcher name] EOF Encrypt sensitive vulnerability details for secure sharing gpg --symmetric --cipher-algo AES256 vulnerability_details.txt
Windows Tools for Vulnerability Documentation:
Capture network traffic for proof-of-concept netsh trace start capture=yes tracefile=vulnerability.etl ... reproduce vulnerability ... netsh trace stop Export system logs for timeline creation Get-WinEvent -LogName Security -MaxEvents 1000 | Export-Csv -Path security_logs.csv Generate hash of vulnerable files for verification Get-FileHash -Path C:\vulnerable\file.dll -Algorithm SHA256
4. The New Reality: Zero-Hour Response Required
With 28.96% of Known Exploited Vulnerabilities now first exploited on or before the day their CVE was publicly published, the traditional 90-day disclosure window is dead. Organizations can no longer wait for patches — they need detection, isolation, and mitigation capabilities that operate at zero-hour.
The numbers tell the story: only 1.1% of CVEs between 2014 and 2023 were ever publicly exploited — approximately 3,000 CVEs out of nearly 300,000. The problem isn‘t the total number of vulnerabilities; it’s the speed at which the dangerous ones are weaponized. Hackers don‘t waste time hunting for vulnerabilities — they prioritize based on ease of exploitation, potential business impact, and how well the target aligns with their preferred platforms or industry sectors.
This is why 0xacb’s approach — combining autonomous ethical hacking with continuous attack surface management — represents the future of security. It‘s not about finding every vulnerability. It’s about finding the right ones, at the right time, and sharing them with the right people before the attackers get there.
Step-by-Step: Zero-Hour Incident Response
Linux Incident Response:
Check for indicators of compromise Examine listening ports and established connections ss -tulpn | grep LISTEN netstat -tuna | grep ESTABLISHED Check for recently modified files (potential backdoors) find / -type f -mtime -1 -ls 2>/dev/null Check for suspicious processes ps aux --sort=-%mem | head -20 top -b -1 1 | head -20 Check for persistence mechanisms crontab -l ls -la /etc/cron systemctl list-timers --all Check for unusual user accounts cat /etc/passwd | grep -v nologin | grep -v false Generate a forensic timeline find / -type f -printf "%T@ %p\n" 2>/dev/null | sort -1 > forensic_timeline.txt
Windows Incident Response (PowerShell):
Check for suspicious processes
Get-Process | Sort-Object -Property CPU -Descending | Select-Object -First 20
Check network connections
Get-1etTCPConnection | Where-Object { $_.State -eq 'Established' }
Check for scheduled tasks (persistence)
Get-ScheduledTask | Where-Object { $_.State -1e 'Disabled' }
Check for recently created files
Get-ChildItem -Path C:\ -Recurse -File -ErrorAction SilentlyContinue |
Where-Object { $_.CreationTime -gt (Get-Date).AddDays(-1) }
Check Windows Event Logs for anomalies
Get-WinEvent -LogName Security -FilterXPath "[System[EventID=4624]]" -MaxEvents 50
Export running services for analysis
Get-Service | Where-Object { $_.Status -eq 'Running' } | Export-Csv services.csv
5. The Path Forward: From Discovery to Defense
The gap between finding and sharing vulnerabilities isn‘t going away — it’s accelerating. But organizations that embrace continuous security, automated discovery, and real-time sharing can turn this challenge into an advantage.
0xacb‘s journey from CTF captain to two-time “Most Valuable Hacker” to co-founder of Ethiack illustrates the evolution required. It’s not enough to be the best at finding bugs; you need to build systems that find, share, and fix them autonomously. As he put it after his second title, this recognition “once again puts Portugal on the world map of cybersecurity for the quality of talent coming from universities and the creativity that is so characteristic of the Portuguese”.
The tools and commands outlined above — from REcollapse to Nuclei, from nmap to PowerShell — are just the beginning. The real transformation happens when organizations integrate these capabilities into a continuous, automated pipeline that detects vulnerabilities, validates them, shares them with stakeholders, and triggers remediation — all before the attackers have time to weaponize them.
What Undercode Say:
- Key Takeaway 1: The traditional vulnerability management model is broken. With mean time to exploit going negative and 28% of CVEs exploited within 24 hours of disclosure, organizations must shift from periodic scanning to continuous, autonomous attack surface management.
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Key Takeaway 2: AI is accelerating both vulnerability discovery and weaponization. While AI-assisted research has driven a 563% increase in Chrome vulnerability disclosures, it has also enabled attackers to operationalize vulnerabilities faster than ever. The solution isn‘t less AI — it’s smarter, faster coordination.
Analysis: The gap between finding and sharing vulnerabilities represents one of the most critical challenges in modern cybersecurity. 0xacb‘s work with Ethiack — building autonomous ethical hacking and continuous attack surface management — points toward the solution: automation that doesn’t just find vulnerabilities but manages the entire lifecycle from discovery to remediation. The data is clear: legacy scanners are too slow, traditional disclosure windows are obsolete, and attackers are moving faster than defenders. Organizations that embrace continuous security, invest in AI-assisted discovery, and build real-time sharing capabilities will survive. Those that don‘t will become statistics. The future belongs to those who can close the gap — not in months or weeks, but in hours or minutes.
Prediction:
- +1 The autonomous ethical hacking market will explode over the next 3-5 years, driven by the urgent need to close the disclosure-exploitation gap, creating new opportunities for AI-powered security platforms like Ethiack.
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-1 Organizations that fail to transition from periodic to continuous security will face a 300%+ increase in successful breaches, as attackers increasingly target the window between vulnerability discovery and patch deployment.
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+1 Coordinated Vulnerability Disclosure frameworks will evolve to include real-time, automated notification systems that bypass traditional 90-day windows in favor of zero-hour collaboration between researchers, vendors, and defenders.
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-1 The “silent bounty” problem — where AI platform vendors fail to assign CVEs or issue advisories — will lead to a wave of undisclosed, unpatched vulnerabilities being exploited in production environments, with catastrophic consequences.
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+1 Open-source tools like REcollapse, combined with community-driven vulnerability databases, will democratize continuous security, enabling smaller organizations to compete with enterprise-grade security teams.
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-1 The widening Coverage Gap between observable exposure and disclosed capability will leave critical infrastructure operators vulnerable, as attackers increasingly target the disconnect between what organizations know and what they can communicate.
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+1 Security researchers who specialize in both discovery and coordinated disclosure — like 0xacb — will become the most valuable assets in the cybersecurity ecosystem, bridging the gap that technology alone cannot close.
▶️ Related Video (74% Match):
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