CVE-2026-77173
Summary
| CVE | CVE-2026-77173 |
|---|---|
| State | PUBLISHED |
| Assigner | hackerone |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-10-27 17:17:03 UTC |
| Updated | 2026-10-28 14:47:07 UTC |
| Description | A user could create a docx or odt file with a # in the filename with confidential information such as a credit card number and have it not be marked as confidential. |
Risk And Classification
Primary CVSS: v3.0 4.3 MEDIUM from [email protected]
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
EPSS: 0.002070000 probability, percentile 0.107440000 (date 2026-10-28)
Problem Types: CWE-284 | CWE-284 CWE-284 Improper Access Control - Generic
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.0 | [email protected] | Secondary | 4.3 | MEDIUM | CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
| 3.0 | CNA | DECLARED | 4.3 | MEDIUM | CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
CVSS v3.0 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
LowIntegrity
NoneAvailability
NoneCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Nextcloud | Files Confidential | affected 3.3.0 5.0.0 semver | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| hackerone.com/reports/3682163 | [email protected] | hackerone.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: XavLimSG (xavlimsg) (en)
Additional Advisory Data
Workarounds
CNA: Change config setting: Add # to forbidden_filename_characters and rename all affected files
There are currently no legacy QID mappings associated with this CVE.