CVE-2025-70314Public exploitNetwork attack vector

Unauthenticated server crash via overlong request URI

Published Feb 12, 2026 · Updated Feb 12, 2026

Buffer overflow in webfsd 1.21 request handling allows remote attackers to crash the server with an overlong HTTP request URI. The request.c path-construction code indexes beyond the fixed-size filename stack buffer because it does not enforce a strict URI-length bound. No authentication or filesystem access is required; a single network request can abort the process and interrupt the web service.

CVSS severity9.8
Critical
EPSS probability0.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in webfsd 1.21 request handling allows remote attackers to crash the server with an overlong HTTP request URI. The request.c path-construction code indexes beyond the fixed-size filename stack buffer because it does not enforce a strict URI-length bound. No authentication or filesystem access is required; a single network request can abort the process and interrupt the web service.

The record

CVE
CVE-2025-70314
Published
Feb 12, 2026
Updated
Feb 12, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-120, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 12, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 12, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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.

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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 exploitPublished

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1499.004Application or System Exploitation

Public exploit references

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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