Medium severity · published Oct 27, 2026
CVE-2026-77173
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
New
4.3
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 11% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FC
Files Confidential · Nextcloud
3.3.0 through 5.0.0 · source: vendor