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CVE-2023-27350

This vulnerability allows remote attackers to bypass authentication on affected installations of PaperCut NG 22.0.5 (Build 63914). Authentication is not required to exploit this vulnerability. The specific flaw exists within the SetupCompleted class. The issue results from improp…

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This vulnerability allows remote attackers to bypass authentication on affected installations of PaperCut NG 22.0.5 (Build 63914). Authentication is not required to exploit this vulnerability. The specific flaw exists within the SetupCompleted class. The issue results from improper access control. An attacker can leverage this vulnerability to bypass authentication and execute arbitrary code in the context of SYSTEM. Was ZDI-CAN-18987.
CVSS 9.8 (CRITICAL) KEV: KNOWN CATALOG

Attention and evidence

HYPE SCORE
1.8/10
REALITY · THREAT PRIORITY
9.0/10
General review priority; not probability

Evidence confidence: Exploitation recorded

Why this priority?
  • Recorded exploitation baseline: +7.00
  • Technical severity: CVSS 9.8: +1.47
  • Fresh EPSS: 100.00%: +0.50

General review priority, not probability, victim count or asset-specific risk. A range covers missing CVSS/EPSS inputs within the current evidence state.

Sources: 18 documents and public datasets.

Hype components

Headline sample (25%)
60/100
Press, 30 days (60%)
5/100
Grounded branding (15%)
0/100
HYPE TOTAL18/100

Sources and documents

watchTowr Labs
Press · 09 Oct 2026, 17:31 · Death By A Thousand PaperCuts (PaperCut Pre-Auth RCE Chain and Patch Bypasses WT-2026-0141-0144/CVE-2026-82077/CVE-2026-82078/CVE-2026-81578)
The Hacker News
Press · 28 Aug 2026, 07:00 · PaperCut Zero-Day Exploited in Attacks, Affecting All NG and MF Versions - The Hacker News
Security Affairs
Press · 28 Aug 2026, 07:00 · PaperCut Zero-Day Under Active Attack: Emergency Patch Released - Security Affairs
Help Net Security
Press · 27 Aug 2026, 07:00 · PaperCut NG/MF vulnerabilities exploited in zero-day attacks - Help Net Security
SentinelOne
Press · 14 May 2024, 07:00 · PaperCut Vulnerability: Unpatched Servers Exploited in the Wild - SentinelOne
See all 18 source documents
Rapid7
Press · 17 May 2023, 07:00 · CVE-2023-27350: Ongoing Exploitation of PaperCut Remote Code Execution Vulnerability - Rapid7
The Hacker News
Press · 12 May 2023, 07:00 · Bl00dy Ransomware Gang Strikes Education Sector with Critical PaperCut Vulnerability - The Hacker News
The Record from Recorded Future News
Press · 12 May 2023, 07:00 · CISA: Bl00dy Ransomware Gang using printer vulnerability to attack schools - The Record from Recorded Future News
TechTarget
Press · 12 May 2023, 07:00 · Bl00dy ransomware gang targets schools via PaperCut flaw - TechTarget
BleepingComputer
Press · 08 May 2023, 07:00 · Microsoft: Iranian hacking groups join Papercut attack spree - BleepingComputer
The Record from Recorded Future News
Press · 08 May 2023, 07:00 · Iranian state-sponsored hackers exploiting printer vulnerability - The Record from Recorded Future News
The Record from Recorded Future News
Press · 27 Apr 2023, 07:00 · Hackers use PaperCut printer vulnerability to spread Clop ransomware - The Record from Recorded Future News
Help Net Security
Press · 25 Apr 2023, 07:00 · PoC exploit for abused PaperCut flaw is now public (CVE-2023-27350) - Help Net Security
SOC Prime
Press · 25 Apr 2023, 07:00 · CVE-2023-27350 Exploit Detection: Critical PaperCut RCE Vulnerability Added to the CISA’s Known Exploited Vulnerabilities Catalog - SOC Prime
GreyNoise
Press · 25 Apr 2023, 07:00 · New Vulnerability: PaperCut MF/NG - GreyNoise
Security Affairs
Press · 24 Apr 2023, 07:00 · Experts released PoC Exploit code for actively exploited PaperCut flaw - Security Affairs
The Hacker News
Press · 22 Apr 2023, 07:00 · CISA Adds 3 Actively Exploited Flaws to KEV Catalog, including Critical PaperCut Bug - The Hacker News
BleepingComputer
Press · 19 Apr 2023, 07:00 · Hackers actively exploit critical RCE bug in PaperCut servers - BleepingComputer

Score evolution

● Hype   ● Reality

Earlier evidence-support scores are retained in history; this chart shows only the current priority definition.

First record: hype 1.8 · reality 9.0 (2026-11-02 15:13). The curve appears once the score changes.

Public exploit evidence

4

Public exploit entries / repo candidates

See 4 repos with metrics
RepositoryStarsForksLanguageUpdated
getdrive/PoC7315Ruby12 Aug 2024, 07:34
imancybersecurity/CVE-2023-27350-POC125Python06 Dec 2024, 21:40
MaanVader/CVE-2023-27350-POC52Python12 May 2023, 13:20
0xB0y426/CVE-2023-27350-PoC00Python14 Apr 2025, 02:36
Public exploit evidence
Evidence context and dated references

Reality is general threat/review priority, combining observed exploitation, CVSS severity and fresh EPSS. Evidence confidence is separate. This is not calibrated risk, a victim count or an asset-specific assessment. A range reflects missing numeric inputs.

Evidence in context

Confidence in exploitation evidence
Exploitation recorded
Priority basis
Recorded exploitation; CVSS 9.8; EPSS 100.0%
Attention, last 30 days
1 distinct story titles; 1 press documents; 1 publisher domains.
Technical potential
network access, no prior privileges, no user interaction.
Observed activity
Exploitation recorded in CISA KEV.
Known scale
Not quantified.
Evidence confidence basis
Trusted exploitation confirmation

Score evaluated: 2026-11-05 13:58:51.863837+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z

Source event timeline
First press mention
19 Apr 2023, 07:00
Published
20 Apr 2023, 00:00
Added to the CISA KEV catalog
21 Apr 2023, 00:00
Latest press mention
09 Oct 2026, 17:31
Score calculated
05 Nov 2026, 13:58
PoCs on GitHub
4 repositories
Source: CVE List V5 · CISA KEV · FIRST EPSS · GitHub · RSSVulnRadar