CVE-2026-21926
Quick assessment
Affected
Oracle Corporation Siebel CRM Deployment
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 Siebel CRM是美国甲骨文（Oracle）公司的一套客户关系管理解决方案。该方案包括销售管理、市场营销管理、客户服务系统、呼叫中心等模块。 Oracle Siebel CRM的Siebel CRM Deployment 17.0版本至25.2版本存在安全漏洞，该漏洞源于未经验证的攻击者可通过TLS网络访问进行攻击，可能导致Siebel CRM Deployment挂起或频繁重复崩溃。
Possible ATT&CK Techniques 1 AI
T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2026-21926
Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
Vulnerability in the Siebel CRM Deployment product of Oracle Siebel CRM (component: Server Infrastructure). Supported versions that are affected are 17.0-25.2. Easily exploitable vulnerability allows unauthenticated attacker with network access via TLS to compromise Siebel CRM Deployment. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Siebel CRM Deployment. 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
Vulnerability Title
Oracle Siebel CRM 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Oracle Siebel CRM是美国甲骨文（Oracle）公司的一套客户关系管理解决方案。该方案包括销售管理、市场营销管理、客户服务系统、呼叫中心等模块。 Oracle Siebel CRM的Siebel CRM Deployment 17.0版本至25.2版本存在安全漏洞，该漏洞源于未经验证的攻击者可通过TLS网络访问进行攻击，可能导致Siebel CRM Deployment挂起或频繁重复崩溃。
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 | Siebel CRM Deployment | 17.0 ~ 25.2 | - |
|
II. Public POCs for CVE-2026-21926
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Vendor Advisories for CVE-2026-21926 (1)
-
https://www.oracle.com/security-alerts/cpujan2026.html vendor-advisory
Same Patch Batch · Oracle Corporation · 2026-01-20 · 66 CVEs total
| CVE-2026-21962 | 10.0 CRITICAL | Oracle Fusion Middleware 安全漏洞 |
| CVE-2026-21969 | 9.8 CRITICAL | Oracle Supply Chain Products Suite 安全漏洞 |
| CVE-2026-21967 | 8.6 HIGH | Oracle Hospitality Applications 安全漏洞 |
| CVE-2026-21988 | 8.2 HIGH | Oracle Virtualization 安全漏洞 |
| CVE-2026-21987 | 8.2 HIGH | Oracle Virtualization 安全漏洞 |
| CVE-2026-21955 | 8.2 HIGH | Oracle Virtualization 安全漏洞 |
| CVE-2026-21956 | 8.2 HIGH | Oracle Virtualization 安全漏洞 |
| CVE-2026-21990 | 8.2 HIGH | Oracle Virtualization 安全漏洞 |
| CVE-2026-21989 | 8.1 HIGH | Oracle Virtualization 安全漏洞 |
| CVE-2026-21973 | 8.1 HIGH | Oracle Financial Services Applications 安全漏洞 |
| CVE-2026-21945 | 7.5 HIGH | Oracle Java SE 安全漏洞 |
| CVE-2026-21940 | 7.5 HIGH | Oracle Supply Chain 安全漏洞 |
| CVE-2026-21957 | 7.5 HIGH | Oracle Virtualization 安全漏洞 |
| CVE-2026-21982 | 7.5 HIGH | Oracle Virtualization 安全漏洞 |
| CVE-2026-21984 | 7.5 HIGH | Oracle Virtualization 安全漏洞 |
| CVE-2026-21983 | 7.5 HIGH | Oracle Virtualization 安全漏洞 |
| CVE-2026-21932 | 7.4 HIGH | Oracle Java SE 安全漏洞 |
| CVE-2026-21986 | 7.1 HIGH | Oracle Virtualization 安全漏洞 |
| CVE-2026-21976 | 7.1 HIGH | Oracle Analytics 安全漏洞 |
| CVE-2026-21939 | 7.0 HIGH | Oracle Database Server 安全漏洞 |
Showing top 20 of 66 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Siebel CRM Deployment
V. Comments for CVE-2026-21926
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