CVE-2026-81285Network attack vector

Unauthenticated website service interruption

Published Aug 28, 2026 · Updated Aug 28, 2026

Denial of service in WPMU DEV Smush 4.2.0 and earlier allows remote attackers to interrupt the affected WordPress site's service via network requests. The CNA maps the issue to uncontrolled resource allocation, but neither its record nor the upstream 4.3.0 changelog names the endpoint, input, or resource-consuming operation. No authentication or user interaction is required; the published impact is limited to availability, with no reported data disclosure or modification.

CVSS severity7.5
High
EPSS probability0.26%
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 WPMU DEV Smush 4.2.0 and earlier allows remote attackers to interrupt the affected WordPress site's service via network requests. The CNA maps the issue to uncontrolled resource allocation, but neither its record nor the upstream 4.3.0 changelog names the endpoint, input, or resource-consuming operation. No authentication or user interaction is required; the published impact is limited to availability, with no reported data disclosure or modification.

The record

CVE
CVE-2026-81285
Published
Aug 28, 2026
Updated
Aug 28, 2026
Vendor
WPMU DEV
Product
Smush
Classifications
CWE-770, CAPEC-469, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 28, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 28, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=n/a <=4.2.0 changes=[{"at":"4.3.0","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

WPMU DEV · Smushversion=n/a <=4.2.0 changes=[{"at":"4.3.0","status":"unaffected"}]

Published CVSS scores

7.5PatchstackCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/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.

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-770Allocation of Resources Without Limits or Throttling
CAPEC-469HTTP DoS
T1499Endpoint Denial of Service

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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