CVE-2023-5222

9.8 criticalEPSS 80%

Critical (9.8) in viessmann vitogate 300 firmware. EPSS 80% chance of exploitation in the next 30 days.

A vulnerability classified as critical was found in Viessmann Vitogate 300 up to 2.1.3.0. This vulnerability affects the function isValidUser of the file /cgi-bin/vitogate.cgi of the component Web Management Interface. The manipulation leads to use of hard-coded password. The exploit has been disclosed to the public and may be used. The identifier of this vulnerability is VDB-240364. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.

Severity

CVSS 3.1

9.8 critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 80% chance of exploitation in the next 30 days; higher than 99% of CVEs (scores of 2026-10-31)
CWE: CWE-259
Published: 2023-09-27
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

viessmann:vitogate_300_firmware

References

https://github.com/Push3AX/vul/blob/main/viessmann/Vitogate300_HardcodedPassword.md
https://vuldb.com/?ctiid.240364
https://vuldb.com/?id.240364
https://github.com/Push3AX/vul/blob/main/viessmann/Vitogate300_HardcodedPassword.md
https://vuldb.com/?ctiid.240364

Check your stack JSON