CVE-2023-35906Network attack vector

IP-restriction bypass via improper access control

Published Sep 5, 2023 · Updated Sep 27, 2024

Improper access control in IBM Aspera Faspex 5.0.5 and earlier allows remote attackers to bypass configured IP restrictions. The login access-control path fails to enforce the configured client-IP policy, although IBM has not disclosed the exact faulty check or request pattern. Exposure requires IP-based restrictions to be configured, and the bypass admits requests from addresses that the policy was intended to block.

CVSS severity5.3
Medium
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in IBM Aspera Faspex 5.0.5 and earlier allows remote attackers to bypass configured IP restrictions. The login access-control path fails to enforce the configured client-IP policy, although IBM has not disclosed the exact faulty check or request pattern. Exposure requires IP-based restrictions to be configured, and the bypass admits requests from addresses that the policy was intended to block.

The record

CVE
CVE-2023-35906
Published
Sep 5, 2023
Updated
Sep 27, 2024
Vendor
IBM
Product
IBM Aspera Faspex
Classifications
CWE-291, CWE-345, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 5, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 27, 2024Record 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=5.0.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

IBM · IBM Aspera Faspexversion=5.0.5

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
5.3IBM CorporationCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-291Reliance on IP Address for Authentication
CWE-345Insufficient Verification of Data Authenticity
T1190Exploit Public-Facing Application

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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