--- title: "Public Exploit Lands for vBulletin’s Pre-Auth RCE, CVE-2026-61511" url: https://daily.dev/posts/public-exploit-lands-for-vbulletin-s-pre-auth-rce-cve-2026-61511-5ndquq9lk source_url: https://latesthackingnews.com/2026/07/28/vbulletin-rce-vulnerability-cve-2026-61511 type: article source: "Latest Hacking News" published: 2026-07-28T13:16:03.658Z updated: 2026-07-28T18:48:42.363Z tags: ["security", "php"] reading_time: 5 upvotes: 0 comments: 0 language: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Public Exploit Lands for vBulletin’s Pre-Auth RCE, CVE-2026-61511 **[Latest Hacking News](https://daily.dev/sources/lhn)** · 5 min read · 0 upvotes · 0 comments ## Summary A public proof-of-concept exploit for CVE-2026-61511, a critical pre-authentication remote code execution vulnerability in vBulletin (CVSS 9.8), was published on July 27. The flaw resides in the `vB5_Template_Runtime::runMaths()` method, which passes insufficiently filtered user input to PHP's `eval()`. Attackers can exploit the `ajax/render/pagenav` endpoint without authentication using a 'phpfuck' technique — constructing executable PHP from only digits, parentheses, and operators. Affected versions include vBulletin 5.0.0 through 6.2.1; version 6.2.2 is patched. Self-hosted installs that missed the June/July patch cycle are at immediate risk. Mitigations include upgrading to 6.2.2, applying WAF rules on the `pagenav[pagenumber]` parameter, and reviewing access logs for exploitation attempts dating back to late June. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Critical phpBB Vulnerability: Auth Bypass \+ RCE Since 2014](https://daily.dev/posts/critical-phpbb-vulnerability-auth-bypass-rce-since-2014-636hneaei) · Aikido Security · 0 upvotes · 0 comments --- Tags: [#security](https://daily.dev/tags/security), [#php](https://daily.dev/tags/php) [View this post on daily.dev](https://daily.dev/posts/public-exploit-lands-for-vbulletin-s-pre-auth-rce-cve-2026-61511-5ndquq9lk)