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CVE-2026-15638

Cryptographic Padding Oracle

CVSS 4.0 9.1 CRITICALCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-15638

Published

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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-15638

Published

Secret Server (On-Prem)

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Delinea",
                    "product": "Secret Server (On-Prem)",
                    "platforms": [
                        "Windows"
                    ],
                    "versions": [
                        {
                            "status": "affected",
                            "version": "10.5.1",
                            "lessThanOrEqual": "12.1.3",
                            "versionType": "custom"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }

Original source record · Cite this exact observation · Complete original publisher JSON