CVE-2018-25233Public exploit

Local application crash via oversized WebDAV username

Published Mar 30, 2026 · Updated Mar 30, 2026

Improper parameter handling in WebDrive 18.00.5057 allows local users to crash the application via a crafted Secure WebDAV username. The username field accepts a 5,000-byte string during connection testing, and the resulting buffer overflow terminates the process. Triggering requires local access to the client interface and use of Test Connection; the reported consequence is a crash, with no reported data access or code execution.

CVSS severity6.9
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper parameter handling in WebDrive 18.00.5057 allows local users to crash the application via a crafted Secure WebDAV username. The username field accepts a 5,000-byte string during connection testing, and the resulting buffer overflow terminates the process. Triggering requires local access to the client interface and use of Test Connection; the reported consequence is a crash, with no reported data access or code execution.

The record

CVE
CVE-2018-25233
Published
Mar 30, 2026
Updated
Mar 30, 2026
Vendor
South River Technologies
Product
WebDrive
Classifications
CWE-233, T1499
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 30, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 30, 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=18.00.5057

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

South River Technologies · WebDriveversion=18.00.5057

Published CVSS scores

6.2VulnCheckCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
6.2NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
6.9VulnCheckCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA: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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-233Improper Handling of Parameters
T1499Endpoint Denial of Service

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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