CVE-2025-13915Network attack vector

Unauthenticated access via undisclosed sign-up bypass

Published Dec 26, 2025 · Updated Dec 26, 2025

Authentication bypass in IBM API Connect 10.0.8.0 through 10.0.8.5 and 10.0.11.0 allows remote attackers to access the application. IBM has not published the affected request path or the validation error that permits the authentication check to be bypassed. The path is network-reachable without credentials, and enabled Developer Portal self-service sign-up increases exposure to unauthorized access.

CVSS severity9.8
Critical
EPSS probability9.14%
Next 30 days · Sep 17, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in IBM API Connect 10.0.8.0 through 10.0.8.5 and 10.0.11.0 allows remote attackers to access the application. IBM has not published the affected request path or the validation error that permits the authentication check to be bypassed. The path is network-reachable without credentials, and enabled Developer Portal self-service sign-up increases exposure to unauthorized access.

The record

CVE
CVE-2025-13915
Published
Dec 26, 2025
Updated
Dec 26, 2025
Vendor
IBM
Product
API Connect
Classifications
CWE-305, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 26, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 26, 2025Record 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=10.0.11.0
  2. Affected versionversion=10.0.8.0 <=10.0.8.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

IBM · API Connectversion=10.0.11.0; version=10.0.8.0 <=10.0.8.5

Published CVSS scores

9.8IBMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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 11, 2026Sep 17, 2026
Latest reporting daySep 17, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-305Authentication Bypass by Primary Weakness
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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