Critical

Authentication Bypass in IBM API Connect

IdentifiersCVE-2025-13915CWE-305· Authentication Bypass by Primary…

CVE-2025-13915 is a critical authentication bypass vulnerability in IBM API Connect affecting versions 10.0.8.0 through 10.0.8.5 and 10.0.11.0. According to IBM, a remote attacker can bypass authentication mechanisms and gain unauthorized access to the application. The issue is classified as CWE-305. Available supporting content indicates the flaw is network-exploitable, requires no prior authentication, no privileges, and no user interaction. IBM has not provided detailed public technical root-cause information in the supplied content beyond the authentication bypass condition, so the exact vulnerable function or code path is not currently available.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation allows an unauthenticated remote attacker to gain unauthorized access to IBM API Connect, potentially compromising the confidentiality, integrity, and availability of the affected environment. Because API Connect commonly sits in front of sensitive APIs and management functions, exploitation could expose configuration data, permit unauthorized administrative or application-level actions, enable modification of API definitions or settings, and disrupt API services. The supplied content and CVSS vector indicate high impact across confidentiality, integrity, and availability.

Mitigation

If you can’t patch tonight, do this now.

If the vendor fix cannot be applied immediately, IBM advises disabling self-service sign-up on the Developer Portal as a temporary mitigation to reduce exposure. Additional risk-reduction measures supported by the supplied content include restricting network access to API Connect management and portal interfaces, especially from the internet or other untrusted networks, and increasing monitoring for unauthorized access attempts, anomalous API calls, and unexpected configuration changes. This mitigation is not a substitute for patching.

Remediation

Patch, then assume compromise.

IBM recommends immediate remediation by applying the vendor-provided fixes/interim fixes (iFixes) for affected release lines and upgrading to a remediated version of IBM API Connect. The supplied content states that IBM has published iFix guidance for the affected 10.0.8.x versions and for 10.0.11.0. Organizations should deploy the appropriate IBM fix for their exact version, validate that authentication controls function correctly after update, and review API Connect and management access logs for signs of prior unauthorized access or anomalous activity.

PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType

International Business MachinesApi Connectapplication

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

ACTIVITY FEED

Recent activity

72 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.

72 SOURCESView more in app

cloudatg insightsNews

Feb 13, 2026

AI Development & Software Engineering | CloudATG

Critical authentication bypass in IBM API Connect that could allow remote attackers to bypass authentication and gain access.

cloudatg insightsNews

Feb 13, 2026

AI Development & Software Engineering | CloudATG

IBM API Connect authentication bypass vulnerability enabling remote access.

checkpoint research blogNews

Jan 5, 2026

5th January - Threat Intelligence Report - Check Point Research

A critical authentication-bypass vulnerability in IBM API Connect that allows remote, unauthenticated access; affects versions 10.0.8.0–10.0.8.5 and 10.0.11.0.

thecyberexpress com vulnerabilitiesNews

Jan 5, 2026

Critical IBM API Connect Vulnerability Enables Authentication Bypass

A critical authentication bypass vulnerability in IBM API Connect (CVE-2025-13915) allows remote attackers to gain unauthorized access to applications by circumventing authentication controls. The flaw affects multiple versions in the 10.x series and can be exploited remotely without user interaction, potentially leading to full compromise of confidentiality, integrity, and availability.

+11 more in the timeline

What this page doesn’t show

The version that knows your environment.

This page is what’s public. Mallory adds the parts that aren’t: which of your assets are affected, which adversaries are exploiting it right now, which detections to deploy, and what to do tonight.

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Exposure mapping

Query your assets running an affected version, and investigate the blast radius.

Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity57

Community discussion across Reddit, Mastodon, and other social sources.

EXTERNAL REFERENCES

MITRE CVE

cve.org · CVE-2025-13915

NVD

nvd.nist.gov/vuln/detail/CVE-2025-13915

MITRE CWE · CWE-305

Authentication Bypass by Primary Weakness

Vendor Advisory

ibm.com/support/pages/node/7255149