Is this vulnerability remotely exploitable?

It is not directly remote in the network sense; an attacker must convince a victim to open a crafted file in Vim. However, because opening the file in the default configuration can trigger immediate code execution, it effectively behaves like a one-click or open-and-own local attack.

What kind of access does an attacker need to exploit this?

The attacker needs the ability to provide or modify a file that the target user will open with Vim. This can be achieved via email attachments, downloads, shared repositories, or any mechanism that results in the victim editing the attacker's file.

What is the safest general fix pattern?

The strongest pattern is to ensure that any file-controlled expressions or configuration hints are either disabled for untrusted content or subject to strict execution guardrails equivalent to or stronger than modeline protections (e.g., explicit opt-in, whitelisting, or interactive confirmation before executing commands).

Severity:

CRITICAL RISK

(9.2)

Command Injection (CWE-78) via %{expr} in Vim Tabpanel Handling

CVE-2026-34714

Published:

Mar 30, 2026

Status:

Modified

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

Recent Vulnerabilities

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

Remote Code Execution on the Router

April 6, 2026

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Remote Code Execution on Router Firmware

April 6, 2026

Vulnerability Type

Category:

Command Injection

CWE:

CWE-78

Impact:

Arbitrary Code Execution on the Local System

Severity:

CRITICAL RISK

(9.2)

CVSS Version:

3.1

Vulnerability Type

Category:

Command Injection

CWE:

CWE-78

Impact:

Arbitrary Code Execution on the Local System

Severity:

CRITICAL RISK

(9.2)

CVSS Version:

3.1

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Ask AI for summary of CodeAnt

Command Injection (CWE-78) via %{expr} in Vim Tabpanel Handling

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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