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syWEB EUVDEUVD-2026-67135

| CVE-2026-11754 MEDIUM
Observable Discrepancy (CWE-203)
2026-08-27 TR-CERT GHSA-qgvf-2v68-gv59
5.3
CVSS 3.1 · Vendor: TR-CERT
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Severity by source

Vendor (TR-CERT) PRIMARY
5.3 MEDIUM
AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
vuln.today AI
5.3 MEDIUM

Network-accessible with no authentication; impact is strictly limited confidentiality via account enumeration, with no integrity or availability effect.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (TR-CERT).

CVSS VectorVendor: TR-CERT

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

Lifecycle Timeline

1
Analysis Generated
Aug 27, 2026 - 18:26 vuln.today

DescriptionCVE.org

Observable discrepancy vulnerability in Seres Software syWEB allows Account Footprinting.

This issue affects syWEB: through 27082026. NOTE: The vendor was contacted and it was learned that the product is not supported.

AnalysisAI

Account footprinting via observable discrepancy in Seres Software syWEB exposes valid user account existence to unauthenticated remote attackers. All versions through 27082026 are affected, and the vendor has confirmed the product is end-of-life with no support - meaning no patch will ever be released. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
technique details hidden
Delivery
technique details hidden
Exploit
technique details hidden
Execution
technique details hidden
Impact
technique details hidden

Vulnerability AssessmentAI

Exploitation No special conditions are required for exploitation - the CVSS vector AV:N/AC:L/PR:N/UI:N indicates remote unauthenticated exploitation against the default configuration of syWEB when it is network-accessible. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS base score of 5.3 (Medium) reflects a limited-scope confidentiality impact - account enumeration does not directly enable account takeover, but it is a meaningful reconnaissance primitive that can feed credential-stuffing or phishing campaigns. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation No vendor-released patch has been identified at time of analysis, and none is expected - the vendor has confirmed syWEB is unsupported. … Detailed patch versions, workarounds, and compensating controls in full report.

Threat intelligence, references, and detailed analysis are available after sign-in.

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EUVD-2026-67135 vulnerability details – vuln.today

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