CVE-2026-15640Network attack vector

User impersonation via manipulated SAML response

Published Sep 15, 2026 · Updated Sep 15, 2026

Authentication bypass in Delinea Secret Server On-Premises 10.5.0 through 12.1.3 allows remote attackers to impersonate another user. The SAML service-provider login flow accepts a valid IdP response under undisclosed conditions while associating it with a different Secret Server user. SAML must be enabled and a valid IdP response must be available; Delinea has not publicly disclosed the exact manipulation or resulting vault permissions.

CVSS severityUnavailable
Unscored
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Delinea Secret Server On-Premises 10.5.0 through 12.1.3 allows remote attackers to impersonate another user. The SAML service-provider login flow accepts a valid IdP response under undisclosed conditions while associating it with a different Secret Server user. SAML must be enabled and a valid IdP response must be available; Delinea has not publicly disclosed the exact manipulation or resulting vault permissions.

The record

CVE
CVE-2026-15640
Published
Sep 15, 2026
Updated
Sep 15, 2026
Vendor
Delinea
Product
Secret Server On-Premises
Classifications
Unavailable
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=10.5.0 <=12.1.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Delinea · Secret Server On-Premisesversion=10.5.0 <=12.1.3

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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