CVE-2026-15638— Cryptographic Padding Oracle
Quick assessment
Affected
Delinea Secret Server (On-Prem)
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.
拥有 Secret Server 访问权限的未经身份验证的用户可以利用填充预言机（padding oracle）漏洞，使用服务器其中一个加密密钥对数据进行解密或加密。密钥本身并未暴露。
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I. Basic Information for CVE-2026-15638
Vulnerability Information
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Vulnerability Title
Cryptographic Padding Oracle
Source: CVE Program / CVE List V5
Vulnerability Description
An unauthenticated user with access to Secret Server could leverage a padding oracle to decrypt or encrypt data using one of the server's cryptographic keys. The key itself is not exposed.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:H/SI:H/SA:H
Source: CVE Program / CVE List V5
Vulnerability Type
使用已被攻破或存在风险的密码学算法
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Delinea | Secret Server (On-Prem) | 10.5.1 ~ 12.1.3 | - |
|
II. Public POCs for CVE-2026-15638
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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No public POC found.
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Vendor Advisories for CVE-2026-15638 (1)
Same Patch Batch · Delinea · 2026-09-15 · 3 CVEs total
| CVE-2026-15640 | 9.5 CRITICAL | Authentication Bypass via SAML Response Manipulation |
| CVE-2026-15639 | 9.3 CRITICAL | Reflected Cross-Site Scripting |
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V. Comments for CVE-2026-15638
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