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CVE-2026-65612— Shell Command Injection in nnn

Quick assessment

Affected
nnn nnn
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.

Arun Prakash Jana nnn是Arun Prakash Jana个人开发者开源的一个用 C 语言编写的便携式终端文件管理器。 Arun Prakash Jana nnn 5.2版本存在命令注入漏洞，该漏洞源于未对文件名变量进行清理，可能导致攻击者通过特制文件名注入shell命令并以nnn进程权限执行任意代码。

CVSS 5.1 · Medium EPSS 0.33% · P25

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 1

VendorProduct Version RangeStatus
nnn nnn 5.2 affected
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I. Basic Information for CVE-2026-65612

Vulnerability Information
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Vulnerability Title
Shell Command Injection in nnn
Source: CVE Program / CVE List V5
Vulnerability Description
nnn does not sanitize the filename variable. An attacker can place a file with a crafted name on a shared filesystem, removable media, or inside an extracted archive whose name contains a single quote followed by shell syntax. If the victim navigates to that file and opens it with preview-tabbed, the filename is embedded into the generated shell command and the injected payload executes with the privileges of the nnn process. Maintainer of this project was notified about this vulnerability. It might has been addressed, but the maintainer did not provide a vulnerable version range. Only version 5.2 was tested and confirmed as vulnerable.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:L/SI:L/SA:L
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Arun Prakash Jana nnn 命令注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Arun Prakash Jana nnn是Arun Prakash Jana个人开发者开源的一个用 C 语言编写的便携式终端文件管理器。 Arun Prakash Jana nnn 5.2版本存在命令注入漏洞，该漏洞源于未对文件名变量进行清理，可能导致攻击者通过特制文件名注入shell命令并以nnn进程权限执行任意代码。
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
nnn nnn 5.2 -

II. Public POCs for CVE-2026-65612

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III. Intelligence Information for CVE-2026-65612

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Security Blog Posts for CVE-2026-65612 (1)

Same Patch Batch · nnn · 2026-08-19 · 4 CVEs total

CVE-2026-65611 5.1 MEDIUM Shell Command Injection in nnn
CVE-2026-65610 2.4 LOW Numeric Truncation Error in nnn
CVE-2026-65609 2.4 LOW Out-of-bounds write in nnn

IV. Related Vulnerabilities

Same product: nnn
Same vendor: nnn
Same weakness: CWE-78

V. Comments for CVE-2026-65612

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