What is CVE-2026-63563?

CVE-2026-63563 is a medium-severity vulnerability in Sharp Corporation Mfps, classified under Initialization of a Resource with an Insecure Default. CVSS score: 6.5/10. Published 2026-08-03.

How severe is CVE-2026-63563?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Is CVE-2026-63563 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

RCE in Sharp Corporation Mfps

CVE-2026-63563

Sharp and Toshiba Tec MFPs (multifunction printers) for a certain market have been shipped with the user authentication feature disabled in the initial configuration. When used with the initial configuration, the address book editing and a range of features related to Document Filing can be accessed without user authentication. Products intended for the Japanese market are not affected.

EPSS: 0.003 (23.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.

Affected products

Sharp Corporation Mfps — versions see the information provided by Sharp Corporation
Toshiba Tec Corporation Mfps — versions see the information provided by Toshiba Tec

Weakness classification (CWE)

CWE-1188 — Initialization of a Resource with an Insecure Default

Public proof-of-concept exploits

redr0nin/CVE-2026-63563

References

Frequently asked questions

What is CVE-2026-63563?: CVE-2026-63563 is a medium-severity vulnerability in Sharp Corporation Mfps, classified under Initialization of a Resource with an Insecure Default. CVSS score: 6.5/10. Published 2026-08-03.
How severe is CVE-2026-63563?: Medium severity. CVSS v3 base score is 6.5 out of 10.
Is CVE-2026-63563 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.