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Response snapshot Oct 27, 2026, 03:57 UTC

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VulnerabilityCVE-2026-18390

Improper neutralization of special elements used in an OS command ('OS command injection') vulnerability in Ministry of Justice General Directorate of Information Technology UYAP...

Improper neutralization of special elements used in an OS command ('OS command injection') vulnerability in Ministry of Justice General Directorate of Information Technology UYAP Document Editor on Windows and Linux and Ministry of Justice General Directorate of Information Technology UYAP Document Editor on iOS allows OS Command Injection.

At a glance

Exploited
Not known
Severity
7.8 High (CVSS 3.1)
Chance of exploitation
0.5% in the next 30 days
Sources
1 source

What to do

Check the vendor advisory for affected versions and fixes.

Read NVD CVE-2026-18390 (opens a new tab)

What happened

Improper neutralization of special elements used in an OS command ('OS command injection') vulnerability in Ministry of Justice General Directorate of Information Technology UYAP Document Editor on Windows and Linux and Ministry of Justice General Directorate of Information Technology UYAP Document Editor on iOS allows OS Command Injection.

This issue affects UYAP Document Editor: before 5.4.20; UYAP Document Editor: before 5.4.21.

Scores and how they were measured

CVSS base severity

7.8

Version 3.1As of

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

Measurement source (opens a new tab)

How bad it is if exploited. Not a prediction of exploitation or proof you are exposed.

EPSS probability

0.5%

Scored Percentile 41.9%

Model and measurement source (opens a new tab)

A model's estimate of exploitation in the next 30 days, not certainty or your own risk.

Sources

  1. Primary source

    NVD CVE-2026-18390 (opens a new tab)

    NVD record: description, CVSS (the CNA score is preferred), affected products, and publication date. Not evidence of exploitation.

    Published Checked

  2. Primary source

    NVD CVE API 2.0 (opens a new tab)

    The NVD API page that supplied this CVE record.

    Published Date not suppliedChecked

  3. Primary source

    FIRST measured EPSS score (opens a new tab)

    Measured EPSS probability and percentile for CVE-2026-18390, scored 2026-10-26. A model estimate, not proof of exposure.

    Published Checked

Cite this record

For factual claims, cite the primary sources above; cite KEVWire for its compilation, dates, and classifications.

APA

KEVWire. (2026, October 14). Improper neutralization of special elements used in an OS command ('OS command injection') vulnerability in Ministry of Justice General Directorate of Information Technology UYAP... (CVE-2026-18390). https://kevwire.com/record/CVE-2026-18390

MLA

"Improper neutralization of special elements used in an OS command ('OS command injection') vulnerability in Ministry of Justice General Directorate of Information Technology UYAP... (CVE-2026-18390)." KEVWire, 14 Oct. 2026, kevwire.com/record/CVE-2026-18390.

Chicago

KEVWire. "Improper neutralization of special elements used in an OS command ('OS command injection') vulnerability in Ministry of Justice General Directorate of Information Technology UYAP... (CVE-2026-18390)." Last modified October 14, 2026. https://kevwire.com/record/CVE-2026-18390.

Evidence summary (plain text)

Improper neutralization of special elements used in an OS command ('OS command injection') vulnerability in Ministry of Justice General Directorate of Information Technology UYAP... (Oct 12, 2026).
Improper neutralization of special elements used in an OS command ('OS command injection') vulnerability in Ministry of Justice General Directorate of Information Technology UYAP Document Editor on Windows and Linux and Ministry of Justice General Directorate of Information Technology UYAP Document Editor on iOS allows OS Command Injection.

This issue affects UYAP Document Editor: before 5.4.20; UYAP Document Editor: before 5.4.21.
CVSS 7.8 (version 3.1; evidence as of Oct 14, 2026; https://nvd.nist.gov/vuln/detail/CVE-2026-18390).
EPSS 0.5% for the following 30 days, scored Oct 26, 2026 (https://api.first.org/data/v1/epss?cve=CVE-2026-18390&date=2026-10-26).
Sources:
NVD CVE-2026-18390: https://nvd.nist.gov/vuln/detail/CVE-2026-18390
NVD CVE API 2.0: https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-18390
FIRST measured EPSS score: https://api.first.org/data/v1/epss?cve=CVE-2026-18390&date=2026-10-26
Record ID: CVE-2026-18390.
Record origin: Ingested record.
AI evidence: Not assessed.
Known exploitation: Not assessed.
Zero-day status: Not assessed. KEV membership alone does not establish zero-day status.
About this data

This record was ingested from a data source. Retrieved: Oct 27, 2026, 04:01 UTC. Ingestion is not an independent editorial investigation.

NVD status: Deferred. Publication in the NVD is not evidence of exploitation.

Looked up on demand from NVD because this CVE is outside the regularly tracked set (older, or rated below HIGH). It is not in CISA's Known Exploited Vulnerabilities catalog as of the last ingestion.

A CISA KEV listing documents known exploitation, not necessarily a zero-day; absence from the catalog does not prove a vulnerability has never been exploited.

Technology tags indicate possible relevance, not verified exposure. Confirm the affected product, version, and configuration against your own inventory; KEVWire does not scan your systems.

A personal reading checklist on this device, not verified remediation.

Record JSON

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Record details

Record detail