Improper input validation in Cybozu, Inc. Cybozu Office
Priority LOW 30CWE-20Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
Improper input validation vulnerability in Custom App of Cybozu Office 10.0.0 to 10.8.4 allows authenticated attacker to alter the data of Custom App via unspecified vectors.
Why it matters now
EPSS 0.00769 55th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Cybozu, Inc. | Cybozu Office | 10.0.0 to 10.8.4 | — | No fix listed | CNA |
- Cybozu Office VendorCybozu, Inc. Affected 10.0.0 to 10.8.4 Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:cybozu:office:*:*:*:*:*:*:*:* | 10.0.0 – 10.8.4 | Vulnerable | Cybozu, Inc. |
- cpe:2.3:a:cybozu:office:*:*:*:*:*:*:*:* Versions 10.0.0 – 10.8.4 Vulnerable ·Cybozu, Inc.
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-20631
- 2026-10-03 Alias added: GHSA-7m7w-wrm8-m78q
References
More Cybozu, Inc. Office vulnerabilities
- TI-2014-04330 Buffer overflow in Cybozu Office 9 and 10 before 10.1.0, Mailwise 4 and 5 before 5.1.4… CVSS 2.0HIGH 9.0
- TI-2016-01055 Multiple cross-site request forgery (CSRF) vulnerabilities in Cybozu Office 9.9.0 through… CVSS 3.0HIGH 8.8
- TI-2018-00659 Path traversal in Cybozu, Inc. Cybozu Office CVSS 3.0HIGH 7.5
- TI-2018-00658 Path traversal in Cybozu, Inc. Cybozu Office CVSS 3.0HIGH 7.5
- TI-2015-06995 Open redirect vulnerability in Cybozu Office 10.2.0 through 10.3.0 allows remote… CVSS 3.0HIGH 7.4
- TI-2019-04311 Path traversal in Cybozu, Inc. Cybozu Office CVSS 3.1MEDIUM 6.5
Sources
- CVE-2021-20631 · CVE Program
- CVE-2021-20631 · NVD
- FIRST EPSS
- GHSA-7m7w-wrm8-m78q · GitHub Advisory Database · CC BY 4.0
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