Is CVE-2026-27613 actively exploited?

No active exploitation of CVE-2026-27613 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-27613 be exploited remotely?

Yes. CVE-2026-27613 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-27613?

CVE-2026-27613 has a CVSS score of 9.8 (CRITICAL) and an EPSS exploitation probability of 0.21%.

HOME VULNERABILITIESCVE-2026-27613

CRITICAL

CVE-2026-27613

CWE-78Published: February 25, 2026· Updated: Mar 4, 2026

9.8

CVSS v3.1

EPSS:0.21%probability of exploitation in 30 daysPercentile:43.3th

Official Description

TinyWeb is a web server (HTTP, HTTPS) written in Delphi for Win32. A vulnerability in versions prior to 2.01 allows unauthenticated remote attackers to bypass the web server's CGI parameter security controls. Depending on the server configuration and the specific CGI executable in use, the impact is either source code disclosure or remote code execution (RCE). Anyone hosting CGI scripts (particularly interpreted languages like PHP) using vulnerable versions of TinyWeb is impacted. The problem has been patched in version 2.01. If upgrading is not immediately possible, ensure `STRICT_CGI_PARAMS` is enabled (it is defined by default in `define.inc`) and/or do not use CGI executables that natively accept dangerous command-line flags (such as `php-cgi.exe`). If hosting PHP, consider placing the server behind a Web Application Firewall (WAF) that explicitly blocks URL query string parameters that begin with a hyphen (`-`) or contain encoded double quotes (`%22`).

NVD Source

Technical Analysis

CVE-2026-27613 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.