# CVE-2026-15638

## Summary

- **CVE ID:** CVE-2026-15638
- **Severity:** CRITICAL
- **CVSS Score:** 9.1 (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)
- **CWE:** CWE-327
- **Published:** Sep 15, 2026
- **Last Modified:** Sep 16, 2026

## 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.

## Affected Products

- Delinea — Secret Server (On-Prem) (10.5.1)

## References

- [CNA](https://delinea.com/security-advisories)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.20%
- **EPSS Percentile:** 10.4

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-19._