CVE-2026-30291

High

Published: 01 April 2026

Published

01 April 2026

Modified

27 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 0.0002 5.3th percentile

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

Summary

CVE-2026-30291 is a high-severity External Control of File Name or Path (CWE-73) vulnerability in Github (inferred from references). Its CVSS base score is 8.4 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked at the 5.3th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).

Threat & Defense at a Glance

What attackers do: exploitation maps to Exploitation for Privilege Escalation (T1068) 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

Directly requires validation and sanitization of file inputs during the import process to prevent malicious files from overwriting critical internal files.

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

preventdetect

Monitors and verifies the integrity of critical internal files and software to prevent or detect unauthorized overwrites exploited via the file import vulnerability.

SI-2 Flaw Remediation good match

detectrespond

Identifies, reports, and corrects flaws like the arbitrary file overwrite in the PDF reader app through timely remediation and patching.

MITRE ATT&CK Enterprise TechniquesAI

T1068 Exploitation for Privilege Escalation Privilege Escalation

Adversaries may exploit software vulnerabilities in an attempt to elevate privileges.

attack.mitre.org →

T1203 Exploitation for Client Execution Execution

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

attack.mitre.org →

Why these techniques?

Arbitrary file overwrite in client PDF app enables local code execution (T1203) and potential privilege escalation (T1068) with no prior access or interaction required.

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

NVD Description

An arbitrary file overwrite vulnerability in Ora Tools PDF Reader ' Reader & Editor APPv4.3.5 allows attackers to overwrite critical internal files via the file import process, leading to arbitrary code execution or information exposure.

Deeper analysisAI

CVE-2026-30291, published on 2026-04-01, is an arbitrary file overwrite vulnerability (CWE-73) in the Ora Tools PDF Reader & Editor app version 4.3.5. The issue resides in the file import process, which allows attackers to overwrite critical internal files. 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), indicating high severity due to potential impacts on confidentiality, integrity, and availability.

Local attackers can exploit this vulnerability with low attack complexity, no privileges, and no user interaction required. By crafting a malicious file for import, they can overwrite essential internal files, achieving arbitrary code execution or information exposure on the affected device.

Mitigation guidance is available in related advisories and resources, including the GitHub issue at https://github.com/Secsys-FDU/AF_CVEs/issues/18, the vendor site at https://oratools.github.io/, the Google Play Store listing at https://play.google.com/store/apps/details?id=pdf.reader.editor.office.ora, and the Secsys Fudan page at https://secsys.fudan.edu.cn/.