Path Traversal in Sma Boy 3.0
CVE-2021-4459
An authorized remote attacker can access files and directories outside the intended web root, potentially exposing sensitive system information of the affected Sunny Boy devices.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.007 (50.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 50.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: +0.000
Affected products
- Sma Boy 3.0 — versions 0.0.0
- Sma Boy 3.6 — versions 0.0.0
- Sma Boy 4.0 — versions 0.0.0
- Sma Boy 5.0 — versions 0.0.0
- Sma Boy 6.0 — versions 0.0.0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2021-4459?
- CVE-2021-4459 is a medium-severity vulnerability in Sma Boy 3.0, classified under Relative Path Traversal. CVSS score: 6.5/10. Published 2025-08-27.
- How severe is CVE-2021-4459?
- Medium severity. CVSS v3 base score is 6.5 out of 10.