Medium

Authentication Brute-Force Weakness in PaperCut NG/MF Login Component

IdentifiersCVE-2026-8793CWE-307· Improper Restriction of Excessive…

CVE-2026-8793 is an authentication weakness in the PaperCut NG/MF login component. The product does not properly restrict excessive authentication attempts, allowing repeated login submissions without effective account lockout or rate-limiting protections in some configurations. This enables an unauthenticated remote attacker to systematically attempt large numbers of username and password combinations, including brute-force and credential-stuffing attacks, against exposed authentication interfaces.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation allows an unauthenticated remote attacker to perform unrestricted password-guessing activity against PaperCut NG/MF accounts. If valid credentials are obtained, the attacker may gain unauthorized access to the application with the privileges of the compromised account, which can expose administrative functionality, sensitive configuration data, print-management information, and other resources available to that account. Even without immediate account compromise, the weakness materially increases the likelihood of credential compromise and can contribute to service strain through sustained authentication attempts.

PUBLIC EXPLOITS

Exploits

No valid public exploits. Mallory filtered out 2 candidates as fakes, detection scripts, or README-only repos.

VALID 0 / 2 TOTALView more in app

All candidate exploits were filtered out by Mallory's validation.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType

PaperCut SoftwareNg Mfapplication

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

ACTIVITY FEED

Recent activity

1 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.

1 SOURCESView more in app

No news coverage yet. Advisories and community discussion only.

What this page doesn’t show

The version that knows your environment.

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Exposure mapping

Query your assets running an affected version, and investigate the blast radius.

Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity1