CVE-2025-31958Network attack vector

Unauthenticated control bypass via HTTP request desynchronization

Published Apr 21, 2026 · Updated Apr 21, 2026

HTTP request smuggling in HCL BigFix Service Management 23 allows remote attackers to bypass intermediary controls via crafted requests. HCL has not identified the front-end and back-end HTTP components, header ambiguity, or parsing discrepancy that causes the desynchronization. Exploitation requires no authentication or user interaction but has high complexity; HCL reports only limited information disclosure.

CVSS severity3.7
Low
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

HTTP request smuggling in HCL BigFix Service Management 23 allows remote attackers to bypass intermediary controls via crafted requests. HCL has not identified the front-end and back-end HTTP components, header ambiguity, or parsing discrepancy that causes the desynchronization. Exploitation requires no authentication or user interaction but has high complexity; HCL reports only limited information disclosure.

The record

CVE
CVE-2025-31958
Published
Apr 21, 2026
Updated
Apr 21, 2026
Vendor
HCLSoftware
Product
HCL BigFix Service Management
Classifications
CWE-444, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 21, 2026Record 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=23

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

HCLSoftware · HCL BigFix Service Managementversion=23

Published CVSS scores

3.7HCL SoftwareCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
8.2NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-444Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
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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