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CVE-2026-83349

Quick assessment

Affected
Oracle Corporation Oracle Database Server
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 数据库服务器中的 Oracle Net Services 组件存在漏洞。 受影响的支持版本为 19.3 至 19.32、21.3 至 21.23 以及 23.4.0 至 23.26.3。该漏洞易于利用，允许拥有网络访问权限的未经身份验证的攻击者通过 Oracle Net 途径攻击 Oracle Net Services。成功利用此漏洞可导致 Oracle Net Services 出现挂起或可重复发生的崩溃（完全拒绝服务，即 DoS）。CVSS 3.1 基础分为 7.5（影响可用性）。CVSS 向量：

CVSS 7.5 · High EPSS 0.46% · P37

Possible ATT&CK Techniques 1 AI

T1584 · Compromise Infrastructure

Affected Version Matrix 3

VendorProduct Version RangeStatus
Oracle Corporation Oracle Database Server 19.3≤ 19.32 affected
21.3≤ 21.23 affected
23.4.0≤ 23.26.3 affected
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I. Basic Information for CVE-2026-83349

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 19.3-19.32, 21.3-21.23 and 23.4.0-23.26.3. 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 ability to cause a hang or frequently repeatable crash (complete DOS) of Oracle Net Services. CVSS 3.1 Base Score 7.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/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:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Oracle Corporation Oracle Database Server 19.3 ~ 19.32 -

II. Public POCs for CVE-2026-83349

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III. Intelligence Information for CVE-2026-83349

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Vendor Advisories for CVE-2026-83349 (1)

Same Patch Batch · Oracle Corporation · 2026-09-15 · 634 CVEs total

CVE-2026-83099 10.0 CRITICAL Oracle Forms 授权问题漏洞
CVE-2026-83020 10.0 CRITICAL Oracle Fusion Middleware 12.2.1.4.0 远程代码执行漏洞
CVE-2026-83021 10.0 CRITICAL WebLogic 12.2.1.4/14.1远程代码执行漏洞
CVE-2026-71133 10.0 CRITICAL Oracle Access Manager 授权问题漏洞
CVE-2026-83059 10.0 CRITICAL Oracle Internet Directory 12.2.1.4.0 未授权LDAP攻击
CVE-2026-87230 10.0 CRITICAL Oracle Hyperion Financial Management 11.2.26.0.000 远程未授权访问漏洞
CVE-2026-83031 9.9 CRITICAL Oracle WebCenter Sites 12.2.1.4及14.1.2.0远程接管漏洞
CVE-2026-82997 9.9 CRITICAL Oracle SDP 12.2.1.4/14.1.2.0 远程代码执行
CVE-2026-82998 9.9 CRITICAL Oracle Fusion Middleware 12.2/14.1远程代码执行漏洞
CVE-2026-82999 9.9 CRITICAL Oracle Fusion Middleware 12.2.1.4.0 远程接管漏洞
CVE-2026-83039 9.9 CRITICAL Oracle WebCenter Portal 12.2.1.4/14.1.2.0 远程接管
CVE-2026-73948 9.9 CRITICAL Oracle WebCenter Portal 安全漏洞
CVE-2026-83058 9.9 CRITICAL Oracle Internet Directory 12.2.1.4.0 远程代码执行漏洞
CVE-2026-73945 9.9 CRITICAL Oracle Access Manager 安全漏洞
CVE-2026-71163 9.9 CRITICAL Oracle Access Manager 安全漏洞
CVE-2026-83038 9.9 CRITICAL WebLogic Server 多个版本远程代码执行漏洞
CVE-2026-83282 9.9 CRITICAL Oracle BI 12.2.1.4远程代码执行漏洞
CVE-2026-83056 9.9 CRITICAL Oracle Internet Directory 12.2.1.4.0/14.1.2.1.0 高危RCE
CVE-2026-87172 9.9 CRITICAL Oracle Hyperion FMI 11.2.26.0.000 远程接管漏洞
CVE-2026-83057 9.9 CRITICAL Oracle Internet Directory 12.2.1.4.0远程代码执行

Showing top 20 of 634 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Oracle Database Server
Same vendor: Oracle Corporation

V. Comments for CVE-2026-83349

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