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Sterling Connect CVE-2025-36064

MEDIUM
Improper Restriction of Excessive Authentication Attempts (CWE-307)
2025-09-22 psirt@us.ibm.com
5.9
CVSS 3.1 · NVD
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Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A07:2025 - Authentication Failures
ASVS 5.0
V6 - Authentication Brute-force prevention, rate limiting
Impact

CVSS score of 5.9 (MEDIUM). Attack characteristics: network attack vector, high complexity, no privileges required, no user interaction not required. EPSS exploitation probability: 0.03%.

Exploit ScenarioDerived

This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the medium-severity affected system.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
No patch listed yet 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 28, 2026

IBM Sterling Connect:Express for Microsoft Windows 3.1.0.0 through 3.1.0.22 uses an inadequate account lockout setting that could allow a remote attacker to brute force account credentials. Rated medium severity (CVSS 5.9), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

This vulnerability is classified under CWE-307. IBM Sterling Connect:Express for Microsoft Windows 3.1.0.0 through 3.1.0.22 uses an inadequate account lockout setting that could allow a remote attacker to brute force account credentials. Affected products include: Ibm Sterling Connect\. Version information: through 3.1.0.22.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 5.9 MEDIUM
AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

DescriptionCVE.org

IBM Sterling Connect:Express for Microsoft Windows 3.1.0.0 through 3.1.0.22 uses an inadequate account lockout setting that could allow a remote attacker to brute force account credentials.

Executive ViewAI

Why It Matters

CVE-2025-36064 presents moderate security risk rated CVSS 5.9. Exploitation could compromise the security of affected deployments. Organizations should apply vendor updates when available and monitor for exploitation.

Business Impact: Low
Compensating Controls

Apply vendor patch. If patching is delayed: restrict network access and enable monitoring.

Threat Intelligence Overview

EPSS Score
0.0%
Top 92% exploitable

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.0%
Patch available No
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Defer
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
No
Human Impact
Low

Priority Score

30
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +30
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

Affected Products (CPE)CVE.org

cpe:2.3:a:ibm:sterling_connect\:express:*:*:*:*:*:windows:*:*
CVE-2020-4587 HIGH
7.8 Aug 24

IBM Sterling Connect:Direct for UNIX 4.2.0, 4.3.0, 6.0.0, and 6.1.0 is vulnerable to a stack based buffer ovreflow, caus

CVE-2021-38891 HIGH
7.5 Nov 23

IBM Sterling Connect:Direct Web Services 1.0 and 6.0 uses weaker than expected cryptographic algorithms that could allow

CVE-2021-38890 HIGH
7.5 Nov 23

IBM Sterling Connect:Direct Web Services 1.0 and 6.0 uses an inadequate account lockout setting that could allow a remot

CVE-2020-4767 HIGH
7.5 Oct 28

IBM Sterling Connect Direct for Microsoft Windows 4.7, 4.8, 6.0, and 6.1 could allow a remote attacker to cause a denial

CVE-2025-36137 HIGH
7.2 Oct 30

Privilege escalation in IBM Sterling Connect:Direct for UNIX allows an already-privileged Control Center Director (CCD)

CVE-2013-2989 MEDIUM
6.8 May 28

The file-copying functionality in IBM Sterling Connect:Direct 3.8.00, 4.0.00, and 4.1.0 for UNIX on AIX 6.1 through 7.1

CVE-2023-29260 MEDIUM
5.4 Jul 19

IBM Sterling Connect:Express for UNIX 1.5 is vulnerable to server-side request forgery (SSRF). Rated medium severity (CV

CVE-2023-29259 MEDIUM
5.3 Jul 19

IBM Sterling Connect:Express for UNIX 1.5 browser UI is vulnerable to attacks that rely on the use of cookies without th

CVE-2012-6352 MEDIUM
5.0 Feb 02

The Session Manager in IBM Sterling Connect:Direct through 4.1.0.3 on UNIX allows remote attackers to cause a denial of

CVE-2016-5991 MEDIUM
4.5 Nov 25

IBM Sterling Connect:Direct 4.5.00, 4.5.01, 4.6.0 before 4.6.0.6 iFix008, and 4.7.0 before 4.7.0.4 on Windows allows loc

CVE-2016-0380 LOW
3.3 Aug 08

IBM Sterling Connect:Direct for Unix 4.1.0 before 4.1.0.4 iFix073 and 4.2.0 before 4.2.0.4 iFix003 uses default file per

CVE-2016-5992 LOW
2.5 Nov 25

IBM Sterling Connect:Direct 4.5.00, 4.5.01, 4.6.0 before 4.6.0.6 iFix008, and 4.7.0 before 4.7.0.4 on Windows allows loc

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