CVE-2026-15638 | BDVDB-2026-373285 Detail

DelineaSecret Server (On-Prem)

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.

Impact#

CAPEC-463 Padding Oracle Crypto Attack

Weaknesses#

CWE-327 Use of a Broken or Risky Cryptographic Algorithm

References#

https://delinea.com/security-advisories

Exploit#

No public exploit known

History#

Version 12026-09-15Record published in the CVE List.
Version 22026-09-16Most recent update recorded in the CVE List.

Published

Published: 2026-09-15
Last modified: 2026-09-16

Vendor information

Vendor: Delinea
Product: Secret Server (On-Prem)

All Delinea vulnerabilities

Score

9.1 Critical

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 12.5.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Not classified

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
>= 10.5.1 and <= 12.1.3
Fixed
Not stated

Scoring System

CVSS v4.0

9.1 Critical

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

Metric breakdown
Attack Vector	Network
Attack Complexity	High
Attack Requirements	Present
Privileges Required	None
User Interaction	None
Vulnerable System Confidentiality	High
Vulnerable System Integrity	Low
Vulnerable System Availability	None
Subsequent System Confidentiality	High
Subsequent System Integrity	High
Subsequent System Availability	High

CVSS v3.1

Not available

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).