critical Known exploitedREV. 01
CVE-2023-27350PaperCut MF/NG — Authentication Bypass to System-Level RCE
PaperCut print servers expose a setup class that never checks who is calling it, so an unauthenticated attacker on the network walks past the login screen and runs code with the highest privileges on the print server.
Read the risk
THE VITAL STATS- CVSS score
- 9.8/ 10 CVSS v3.1
- EPSS probability
- 100% Likelihood of exploitation
- Attack complexity
- Low Conditions needed to exploit
- Known exploited
- Yes — CISA KEV
- CVE published
- 2023-04-20
- Added to KEV
- 2023-04-21
- Exploit published
- Yes
- Confidence
- high
- Kill chain
- initial access
- MITRE ATT&CK
- T1190
- Severity
- critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attacker needsNetwork access to an affected PaperCut MF or NG installation. No credentials needed.
Behind the card
4 REFERENCES- 01CVE recordNVD recordnvd.nist.gov
- 02Vendor advisoryPaperCut security bulletinpapercut.com
- 03WriteupSophos: exploitation in the wildnews.sophos.com
- 04CISACISA Known Exploited Vulnerabilities entrycisa.gov
Field-level provenanceTRACE THE SOURCES +
Which source supports each field, when it was retrieved, and who extracted it.
| Fields | Source | Retrieved | Extractor | Confidence |
|---|---|---|---|---|
| title, summary, cvss, severity, exploitation.attack_complexity, exploitation.prerequisites, exploitation.exploit_available, references | nvd.nist.gov | 2026-08-07 | claude-code | high |
| exploitation.known_exploited, remediation.patch_available, recommended_action | cisa.gov | 2026-08-07 | claude-code | high |
| epss | api.first.org | 2026-08-07 | claude-code | high |
Printing history
THE RECORD- r1Initial base card
First printing. This card has not been reprinted since publication.