CVE-2023-5222

criticalpriority · attend · 77OT risk · highEPSS 0.804 · 100 %ileexploit · PoCEUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · PoC

Likely / severe?

80.4% (100th) EPSS

CVSS 9.8 · critical

Is it mine?

7 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · cisa_csaf_ot · nvd

EPSS · scored 2026-10-26

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.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

No vendor fix yet; a mitigation is available.

MitigationViessmann Vitogate 300cisa_csaf_ot
Viessmann Climate Solutions SE recommends customers update to version 3.0.0.0 to fix these vulnerabilities. The software is available to download at their (website)
https://connectivity.viessmann.com/de/mp-fp/vitogate/vitogate-300-bn-mb.html

cvss

Technical severity, 0–10. One row per scoring source.

9.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–critical · 5.8–9.8

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 5.9

v2.05.8mediumAV:A/AC:L/Au:N/C:P/I:P/A:Psecondary · cna@vuldb.comexploitability 6.5 · impact 6.4

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · CISA US

v3.16.3mediumCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:Lsecondary · ENISA EU

v3.16.3mediumCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:Lsecondary · cna@vuldb.comexploitability 2.8 · impact 3.4

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:Hsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: poc · Automatable: no · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-259USCWE-798US

exploits (1)

Public proof-of-concept and weaponised exploit code.

EDB-51887Viessmann Vitogate 300 2.1.3.0 - Remote Code Execution (RCE)PoC · exploit_db

affected products (7)

Products and version ranges known to be affected.

Viessmann Climate Solutions SE Viessmann Vitogate 300: <=2.1.3.0all versionscisa_csaf_otUS
Viessmann Climate Solutions SE Viessmann Vitogate 300≤ 2.1.3.0cisa_csaf_otUS
Viessmann Vitogate 300≤ 2.1.1enisa_euvdEU
Viessmann Vitogate 300≤ 2.1.3enisa_euvdEU
Viessmann Vitogate 300≤ 2.1.2enisa_euvdEU
Viessmann Vitogate 300≤ 2.1.0enisa_euvdEU
viessmann vitogate 300 firmware≤ 2.1.3.0nvdUScpe:2.3:o:viessmann:vitogate_300_firmware:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

ICSA-24-254-01Viessmann Climate Solutions SE Vitogate 3002024-09-10icsa · cisa_csaf_otUS
Successful exploitation of these vulnerabilities could allow an attacker to achieve remote code execution.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cisa_csaf_ot nvd NVD CVE.org MITRE

published 2023-09-27modified 2026-06-17

references (10)

External citations — patches, advisories, analysis.

scry

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