Jon Williams

In case you missed me at Ekoparty or No Hat, here’s a recording of my latest talk. Thanks to all those who made both of these amazing conferences possible! m.youtube.com/watch?v=PM0B...

As promised, here's our walkthrough of CVE-2026-93616, an unauthenticated root RCE affecting Check Point Security Management and Multi-Domain Management servers! bishopfox.com/blog/weaponi...

In the meantime, here’s our analysis of an unauthenticated RCE vuln affecting SolarWinds Access Rights Manager. A hard-coded key facilitates an auth bypass that leads to arbitrary code execution as SYSTEM!

Sneak preview - we fully exploited CVE-2026-93616, an unauthenticated root RCE in Check Point Security Management Server. Blog post coming soon!

Another excellent writeup by my colleague Nate Robb, this one analyzing an auth bypass affecting JFrog Artifactory (CVE-2026-82329)! bishopfox.com/blog/cve-202...

In my latest blog post examining a NetScaler auth bypass CVE-2026-19490, I break down all the different ways the impact can vary depending on the the appliance configuration – ranging from DoS to full root compromise. bishopfox.com/blog/mind-th...

SAML vulns are all the rage these days! Check out this excellent writeup on two bugs in Solarwinds Web Help Desk by my esteemed colleague Ronan Kervella (linkedin.com/in/rkervella).

A simple agent authentication mistake opens up full unauthenticated RCE - check out our latest blog on two Veeam Service Provider Console vulnerabilities! bishopfox.com/blog/a-guid-...

Want to know if your NetScaler is vulnerable to the latest RCE chain? We’ve got you covered!

ManageEngine AD360 is vulnerable to account hijacking via predictable SSO tokens. Did we exploit it? Yep. Can an attacker exploit you? Not likely. Here's why: bishopfox.com/blog/millise...

Some adventures in LLM firmware cracking! bishopfox.com/blog/crackin...

Sometimes a DoS really is just a DoS! Here's a look behind the curtain at the less glamorous side of vuln research, discussing (in mostly laypersons' terms) how we tried in vain to turn a memory corruption bug into full RCE. bishopfox.com/blog/a-crash...

Here we GOOOOOO...! Successfully reproduced a full root unauthenticated RCE chain against UniFi OS Server 5.0.6 – with devastating impacts depending on what devices it manages. Check out our newest blog post: bishopfox.com/blog/popping...

And another one for y’all! This week I published some research into a perfect 10 arbitrary file read affecting Ubiquiti UniFi controller software. I suspect we’ll have more to say about UniFi in the near future… bishopfox.com/blog/looting...

Dropped some new research on the blog this week - this time we’re pulling apart a PAN-OS JWT signature bypass. Enjoy! bishopfox.com/blog/detecti...

We successfully exploited CVE-2026-25075, a denial of service affecting strongSwan VPN servers! Be sure to patch ASAP and check out our blog for a technical analysis: bishopfox.com/blog/strongs...

Our blog post on the Arista XSS to RCE chain is now live! We withheld exploit details because the root cause has not been fully mitigated. Patch now if you haven't already, disable your captive portal to reduce the likelihood of exploitation, and stay tuned for new vulns to be disclosed soon!

My team confirmed that recently disclosed Arista NGFW vulnerabilities are fully exploitable! RCE is possible with victim interaction. More details coming soon to our blog: bishopfox.com/blog

Just published a new blog about using LLMs to accelerate patch diffing! We developed a semi-automated analysis workflow and benchmarked four high-impact vulns using a few different Claude models. Check out how they performed!

I made SonicWall’s hall of fame for this one. Patch your firewalls (again), folks! bishopfox.com/blog/sonicwa...

The DistrictCon talk @noperator.bsky.social and I gave on decrypting SonicWall NSv firmware is up on YouTube now: www.youtube.com/watch?v=FIYK...

Don’t miss @br4inde4d.bsky.social and @noperator.bsky.social presenting: “Tearing Down (Sonic)Walls: Reverse-Engineering SonicOSX Firmware Encryption” at @districtcon.bsky.social Feb 21 at 1:30p.m. And stop by our Coffee Cart for ☕️ & convo! More: bishopfox.com/events/bisho... #SonicWall #firewall

They got me on camera to talk about my recent SonicWall exploit 😄

As promised, our blog post on CVE-2024-53704, a session hijacking vulnerability affecting the SSL VPN component of SonicWall firewalls, has been updated to include full exploitation details. Check it out!

Successfully exploited SonicWall CVE-2024-53704, allowing active SSL VPN sessions to be hijacked on affected firewalls. We'll be withholding details for a while because there are still thousands of vulnerable appliances on the public internet.