Critical severity · published May 28, 2026
CVE-2026-32999
Insufficient character filtering in backup agent signing module on Comet Backup server allows authenticated tenant administrator to execute an arbitrary code on behalf of a…
9.0
CVSS
0.3%
EPSS
No
On KEV
Description
Insufficient character filtering in backup agent signing module on Comet Backup server allows authenticated tenant administrator to execute an arbitrary code on behalf of a privileged user on the affected server and connected devices.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 24% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CB
Comet Backup · WebPros
before 26.4.3; before 26.5.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-32999
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-32999
support.cometbackup.com
https://support.cometbackup.com/hc/en-us/articles/40655100268439--CVE-2026-32999-RCE-on-Comet-Server-via-branding-configuration
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