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CVE-2026-47040

Quick assessment

Affected
Oracle Corporation Oracle Net Services
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Oracle Oracle Net Services是美国Oracle公司的一款数据库网络连接服务软件。 Oracle Net Services 19.3至19.31版本、21.3至21.22版本和23.4.0至23.26.2版本存在安全漏洞，该漏洞源于Oracle Net Services组件问题，可能导致未经身份验证的攻击者通过网络访问Oracle Net，未经授权访问关键数据或所有可访问数据，以及导致服务挂起或频繁崩溃。

CVSS 9.1 · Critical EPSS 0.47% · P39

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 3

VendorProduct Version RangeStatus
Oracle Corporation Oracle Net Services 19.3≤ 19.31 affected
21.3≤ 21.22 affected
23.4.0≤ 23.26.2 affected
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I. Basic Information for CVE-2026-47040

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
Vulnerability in the Oracle Net Services component of Oracle Database Server. Supported versions that are affected are 19.3-19.31, 21.3-21.22 and 23.4.0-23.26.2. Easily exploitable vulnerability allows unauthenticated attacker with network access via Oracle Net to compromise Oracle Net Services. Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all Oracle Net Services accessible data and unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Oracle Net Services. CVSS 3.1 Base Score 9.1 (Confidentiality and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H).
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Oracle Net Services 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Oracle Oracle Net Services是美国Oracle公司的一款数据库网络连接服务软件。 Oracle Net Services 19.3至19.31版本、21.3至21.22版本和23.4.0至23.26.2版本存在安全漏洞，该漏洞源于Oracle Net Services组件问题，可能导致未经身份验证的攻击者通过网络访问Oracle Net，未经授权访问关键数据或所有可访问数据，以及导致服务挂起或频繁崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Oracle Corporation Oracle Net Services 19.3 ~ 19.31 -

II. Public POCs for CVE-2026-47040

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III. Intelligence Information for CVE-2026-47040

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Vendor Advisories for CVE-2026-47040 (1)

Same Patch Batch · Oracle Corporation · 2026-07-21 · 1097 CVEs total

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Showing top 20 of 1097 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same vendor: Oracle Corporation

V. Comments for CVE-2026-47040

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