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Vulnerabilities CVE-2026-34424

CVE-2026-34424

Critical
Open
TLP:CLEAR

Smart Slider 3 Pro 3.5.1.35 Supply Chain Attack Remote Access Toolkit

NVD CVE.org
Supply Chain Attack Backdoor / C2

AI Analysis

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Description

Smart Slider 3 Pro version 3.5.1.35 for WordPress and Joomla contains a multi-stage remote access toolkit injected through a compromised update system that allows unauthenticated attackers to execute arbitrary code and commands. Attackers can trigger pre-authentication remote shell execution via HTTP headers, establish authenticated backdoors accepting arbitrary PHP code or OS commands, create hidden administrator accounts, exfiltrate credentials and access keys, and maintain persistence through multiple injection points including must-use plugins and core file modifications.

Details

CVSS Score
9.3
EPSS Score
0.55%

43.3th percentile

CVSS Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Confidence
90%
Published
Apr 9, 2026
Last Modified
May 14, 2026
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