critical severityConfidence mediumHistorical record

PaperCut NG/MF unauth admin config plus class-loading

Direct answer

PaperCut NG/MF unauth admin config plus class-loading, also tracked as CVE-2026-81578 / PaperCut NG/MF auth bypass is a critical-severity threat campaign HOL Guard tracked from Aug 28, 2026 to Aug 28, 2026, verified against 3 primary sources and last reviewed Sep 20, 2026. Active tracking has ended and the record remains published as a permanent historical research record.

PaperCut NG/MF is affected by an unauthenticated admin configuration path combined with class-loading risk. Apply vendor patches promptly.

Also tracked as CVE-2026-81578 · PaperCut NG/MF auth bypass

First observed
Aug 28, 2026
Last observed
Aug 28, 2026
Last reviewed
Sep 20, 2026
Tracking ended
Aug 28, 2026

Record exports

JSON recordArtifact CSVSTIX 2.1 bundle

Uncertainty and limitations

Read the evidence limits before acting on this record.

Confirm exact fixed builds against the live PaperCut advisory.

  • Exact fixed builds must come from the vendor advisory.
  • HOL blog is operator guidance.

Guard coverage and policy

What Guard's reviewed assertions do and do not claim for this campaign, and the reviewed starting points for defense.

No Guard coverage mapping or campaign-specific policy guidance is published for this record.

Safe next step. Campaign guidance is defensive context. It does not auto-apply policy or claim universal campaign coverage.

Open policy controlsCampaign-specific emergency policy starting point

Timeline

Reviewed events, oldest first, each tied to a verified source.

  1. Disclosure

    CVE-2026-81578 PaperCut NG/MF auth bypass / class-loading disclosed.

    Sources:NVD CVE-2026-81578·CVE Record

  2. Update

    HOL Guard published operator coverage.

    Source:HOL Guard operator write-up

Publication clock: 572.0 hours from reviewed disclosure timestamp to HOL publication; 12-hour critical target; historical backfill outside target.

Reviewed artifacts

The specific artifacts this record concerns, as reviewed. Names and versions are shown as text; a registry link is not recorded here.

  • PaperCut NG/MFgenericpackage

Sources

Every claim on this record is traceable to the sources below.

Campaign questions, answered

PaperCut NG/MF is affected by an unauthenticated admin configuration path combined with class-loading risk. Apply vendor patches promptly. HOL Guard tracked the campaign from Aug 28, 2026 to Aug 28, 2026.

No. Active tracking ended Aug 28, 2026; this page remains as a labeled historical research record and does not imply the threat is currently active.

The record cites 3 primary sources, names 1 reviewed artifact, and was last fully reviewed Sep 20, 2026 by HOL Guard Security Publishing. Its uncertainty and limitations are stated on the record itself.

Campaign guidance is defensive context. It does not auto-apply policy or claim universal campaign coverage.

The permalink above is permanent. The full record can be downloaded from this page as JSON, an artifact CSV, and a STIX 2.1 bundle, and corrections can be requested through the published correction path on the record. Confirm exact fixed builds against the live PaperCut advisory.

Reviewed in full by HOL Guard Security Publishing.

Published
Last full review
Last modified

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Record HGTC-2026-80D3A46B