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CVE-2021-4459— SMA: Directory Traversal in Sunny Boy <3.10.27.R

Quick assessment

Affected
SMA Boy 3.0
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

SMA Solar Technology AG Sunny Boy是德国SMA Solar Technology AG公司的一款光伏逆变器。 SMA Solar Technology AG Sunny Boy存在安全漏洞，该漏洞源于访问控制不当，可能导致敏感系统信息泄露。

CVSS 6.5 · Medium EPSS 0.67% · P51

Possible ATT&CK Techniques 1 AI

T1083 · File and Directory Discovery
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I. Basic Information for CVE-2021-4459

Vulnerability Information
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Vulnerability Title
SMA: Directory Traversal in Sunny Boy <3.10.27.R
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
相对路径遍历
Source: CVE Program / CVE List V5
Vulnerability Title
SMA Solar Technology AG Sunny Boy 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
SMA Solar Technology AG Sunny Boy是德国SMA Solar Technology AG公司的一款光伏逆变器。 SMA Solar Technology AG Sunny Boy存在安全漏洞，该漏洞源于访问控制不当，可能导致敏感系统信息泄露。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
SMA Boy 3.0 0.0.0 ~ 3.10.27.R -
SMA Boy 3.6 0.0.0 ~ 3.10.27.R -
SMA Boy 4.0 0.0.0 ~ 3.10.27.R -
SMA Boy 5.0 0.0.0 ~ 3.10.27.R -
SMA Boy 6.0 0.0.0 ~ 3.10.27.R -

II. Public POCs for CVE-2021-4459

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2021-4459

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Vendor Advisories for CVE-2021-4459 (1)

IV. Related Vulnerabilities

Same vendor: SMA
Same weakness: CWE-23

V. Comments for CVE-2021-4459

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