CVE-2026-65612Network attack vector

Command execution via preview-tabbed filename injection

Published Aug 19, 2026 · Updated Aug 20, 2026

Command injection in preview-tabbed in Arun Prakash Jana nnn 5.2 allows attackers to execute shell commands via a crafted filename. In the preview-tabbed workflow, the hovered filename is embedded into a generated shell command, and CERT.PL states that a single quote followed by shell syntax in that name is executed by the invoked shell. Exploitation requires attacker-controlled content on a shared filesystem, removable media, or an extracted archive and a victim action to open the file with preview-tabbed, after which the payload runs with the privileges of the nnn process.

CVSS severity5.1
Medium
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in preview-tabbed in Arun Prakash Jana nnn 5.2 allows attackers to execute shell commands via a crafted filename. In the preview-tabbed workflow, the hovered filename is embedded into a generated shell command, and CERT.PL states that a single quote followed by shell syntax in that name is executed by the invoked shell. Exploitation requires attacker-controlled content on a shared filesystem, removable media, or an extracted archive and a victim action to open the file with preview-tabbed, after which the payload runs with the privileges of the nnn process.

The record

CVE
CVE-2026-65612
Published
Aug 19, 2026
Updated
Aug 20, 2026
Vendor
Arun Prakash Jana
Product
nnn
Classifications
CWE-78, T1059.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 20, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Arun Prakash Jana · nnnversion=5.2

Published CVSS scores

5.1CERT.PLCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:L/SI:L/SA:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059.004Command and Scripting Interpreter: Unix Shell

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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