Vulnerability record · CVE-2026-15638 · published 16 September 2026

CVE-2026-15638: Broken cryptographic algorithm vulnerability

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.

9.1 CVSS 4.0 Critical EPSS 0.20% · top 91.0% CWE-327 · Broken cryptographic algorithm Awaiting Analysis

9.1CVSS 4.0 base score

0.20%EPSS exploitation probability, 30 days

NoNot in CISA KEV

0Affected product versions listed by NVD

1References

18 Sep 2026Last modified by NVD

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.

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

Link	Tags
https://delinea.com/security-advisories

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Source: NIST National Vulnerability Database (record CVE-2026-15638), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.