CVE-2026-30290

HighPublic PoC

Published: 31 March 2026

Published

31 March 2026

Modified

07 April 2026

KEV Added

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Patch

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CVSS Score 8.4 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Score 0.0003 7.3th percentile

Risk Priority 17 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2026-30290 is a high-severity Path Traversal (CWE-22) vulnerability in Intouchapp Intouch Contacts \& Caller Id. Its CVSS base score is 8.4 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Client Execution (T1203); ranked at the 7.3th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

The strongest mitigations our analysis identified are NIST 800-53 AC-3 (Access Enforcement) and SI-10 (Information Input Validation).

Threat & Defense at a Glance

What attackers do: exploitation maps to Exploitation for Client Execution (T1203) and 1 other technique. What defenders deploy: see the NIST 800-53 controls recommended below.

Threat & Defense Details

Mitigating Controls (NIST 800-53 r5)AI

SI-10 Information Input Validation good match

prevent

Validates file paths and contents during the import process to prevent arbitrary overwrites of critical internal files.

AC-3 Access Enforcement good match

prevent

Enforces access restrictions to block unauthorized write operations to sensitive internal files via the import mechanism.

SI-7 Software, Firmware, and Information Integrity partial match

detect

Monitors integrity of critical files to identify unauthorized changes from the vulnerable file import process.

MITRE ATT&CK Enterprise TechniquesAI

T1203 Exploitation for Client Execution Execution

Adversaries may exploit software vulnerabilities in client applications to execute code.

attack.mitre.org →

T1554 Compromise Host Software Binary Persistence

Adversaries may modify host software binaries to establish persistent access to systems.

attack.mitre.org →

Why these techniques?

Arbitrary file overwrite via path traversal in a client app directly enables local exploitation for code execution (T1203) and facilitates compromising/replacing app binaries or internal files to run attacker-controlled code (T1554).

Confidence: MEDIUM · MITRE ATT&CK Enterprise v18.1

NVD Description

An arbitrary file overwrite vulnerability in InTouch Contacts & Caller ID APP v6.38.1 allows attackers to overwrite critical internal files via the file import process, leading to arbitrary code execution or information exposure.

Deeper analysisAI

CVE-2026-30290 is an arbitrary file overwrite vulnerability (CWE-22) in the InTouch Contacts & Caller ID APP version 6.38.1. Published on 2026-03-31T20:16:26.670, it carries a CVSS v3.1 base score of 8.4 (AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H). The issue enables attackers to overwrite critical internal files through the app's file import process, which can result in arbitrary code execution or information exposure.

A local attacker requires no privileges and can exploit the vulnerability with low attack complexity and no user interaction. By supplying a malicious file during the import process, the attacker can target and overwrite sensitive internal files, achieving high-impact effects on confidentiality, integrity, and availability, such as executing arbitrary code within the app's context or exposing user data.

Advisories and further details are available in the referenced sources: https://github.com/Secsys-FDU/AF_CVEs/issues/19, https://secsys.fudan.edu.cn/, and https://www.intouchapp.com/.