CVE-2026-82078 KEV
9.1
CRITICAL · CVSS 3.1 · EPSS 3.8% (pctl 90)
Patch first
On CISA KEV — known exploited in the wild, due 2026-09-14.
Description
An unsafe dynamic class loading vulnerability exists in the database connection utilities of PaperCut MF and PaperCut NG. The application instantiates database driver classes based on configurable driver names without validating against an allowlist of approved drivers. If an attacker can manipulate system configuration parameters, this enables the execution of arbitrary Java bytecode residing on the application classpath under the security context of the PaperCut server process.
Scoring
| CVSS | 9.1 (CRITICAL, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H |
| EPSS | 3.84% — more likely to be exploited than 90% of all CVEs |
| Weakness | CWE-470 |
| On CISA KEV | yes — remediate by 2026-09-14 |
| Public exploit | none known |
| Published | 2026-08-28 |
| Last modified | 2026-09-14 |
CISA KEV
| Name | PaperCut NG/MF Unsafe Reflection Vulnerability |
|---|---|
| Added | 2026-08-31 |
| Due | 2026-09-14 |
| Vendor / product | PaperCut / NG/MF |
| Ransomware use | none reported |
Affected (2)
| Vendor | Product |
|---|---|
| papercut | papercut mf |
| papercut | papercut ng |
References
→ the Explorer · watch your stack · NVD