CVE-2026-34424: Smart Slider 3 Pro 3.5.1.35 Supply Chain Attack Remote Access Toolkit
- Is it exploited?
Reported, not confirmed by CISA. VulnCheck KEV lists it as exploited in the wild. CISA has not added it to its Known Exploited Vulnerabilities catalog as of .
VulnCheck KEV lists it since . It cites 5 public reports, the first from .
- How likely is exploitation in the next 30 days?
- 0.6%
Down from 1% on .
EPSS score, percentile 46 of all scored records. A probability estimated by FIRST, not a report of exploitation.
- How severe?
- 9.3 Critical
CVSS v4.0 base score, given by the CNA
- What should I do?
CISA has set no required action, because the vulnerability is not in KEV.
- Which versions are affected?
Affected
- 3.5.1.35
- 3.5.1.35
Unaffected 3.5.1.34 and earlier; 3.5.1.36; 3.5.1.34 and earlier; 3.5.1.36
Source: CISA KEV 2026.10.29, as of ; VulnCheck KEV, as of ; FIRST EPSS, as of ; CVE List, as of . About the data.
Description
Smart Slider 3 Pro 3.5.1.35 Supply Chain Attack Remote Access Toolkit
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.
Source: CVE List, as of . About the data.
What to do
Advisories and patches
This summary is based on the CVE record as of . Check the vendor's advisory before you act: affected versions and fixes can change.
Affected products and versions
Versions by product, as listed in the CVE record (2 products)
| Status | Versions |
|---|---|
| Affected | 3.5.1.35 |
| Unaffected | 3.5.1.34 and earlier |
| Unaffected | 3.5.1.36 |
Versions not listed are: unaffected.
| Status | Versions |
|---|---|
| Affected | 3.5.1.35 |
| Unaffected | 3.5.1.34 and earlier |
| Unaffected | 3.5.1.36 |
Versions not listed are: unaffected.
Versions the record lists as unaffected: 3.5.1.36.
Source: CVE List, as of . About the data.
Weakness
CWE-506
CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record.
Timeline
| Date | Event |
|---|---|
| CVE record published | |
| CVE record last updated |