CVE-2025-66675Network attack vector

Service interruption via leaked multipart temporary files

Published Dec 10, 2025 · Updated Dec 10, 2025

Denial of service in Apache Struts 2.0.0 through 6.7.4 and 7.0.0 through 7.0.3 allows remote attackers to exhaust server disk space. JakartaMultiPartRequest.cleanUp() deletes only uploaded items retained in its files map, leaving other parsed FileItem temporary files on disk. File-upload support must be enabled, and repeated multipart requests can consume the hosting volume until the application or other disk-dependent services stop operating.

CVSS severity8.2
High
EPSS probability0.59%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Apache Struts 2.0.0 through 6.7.4 and 7.0.0 through 7.0.3 allows remote attackers to exhaust server disk space. JakartaMultiPartRequest.cleanUp() deletes only uploaded items retained in its files map, leaving other parsed FileItem temporary files on disk. File-upload support must be enabled, and repeated multipart requests can consume the hosting volume until the application or other disk-dependent services stop operating.

The record

CVE
CVE-2025-66675
Published
Dec 10, 2025
Updated
Dec 10, 2025
Vendor
The Apache Software Foundation
Product
Apache Struts
Classifications
CWE-459, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 10, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 10, 2025Record 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=2.0.0 <=6.7.*
  2. Affected versionversion=7.0.0 <=7.0.*

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Apache Software Foundation · Apache Strutsversion=2.0.0 <=6.7.*; version=7.0.0 <=7.0.*

Published CVSS scores

8.2GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/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 exploitUnconfirmed

Weakness, pattern, technique

CWE-459Incomplete Cleanup
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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