CVE-2023-5222

CRITICALNVD 9.89.0▼
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because EPSS predicts 90% probability of exploitation within the next 30 days (top 0.4% of all CVEs). NVD baseline CVSS 6.3 retained for reference. Confidence: see factors.

Triggered by: EPSS exploit prediction ≥85%
Sources: epss, ghsa, nvd
Weaponized
9.8
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 75%
CISA-KEV: Not listedEPSS: 75%CVSS: 9.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
9.8
EG Score
9.0(high)
EPSS
99.4%
KEV
Not listed

Published

September 27, 2023

Last Modified

June 17, 2026

Advisory Details (1)

Auto-updated Jul 9, 2026
No patch confirmed yet.
generic

vul/viessmann/Vitogate300_HardcodedPassword.md at main · Push3AX/vul · GitHub

https://github.com/Push3AX/vul/blob/main/viessmann/Vitogate300_HardcodedPassword.md

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 8× in last 7d / 28× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-22 14:07 UTCEPSS rescore
  2. 2026-07-22 14:07 UTCEPSS rescore
  3. 2026-07-20 17:06 UTCEPSS rescore
  4. 2026-07-19 02:27 UTCEPSS rescore
  5. 2026-07-19 02:27 UTCEPSS rescore
  6. 2026-07-18 10:03 UTCEPSS rescore
  7. 2026-07-18 10:03 UTCEPSS rescore
  8. 2026-07-16 17:01 UTCEPSS rescore
  9. 2026-07-15 16:56 UTCEPSS rescore
  10. 2026-07-13 06:11 UTCEPSS rescore
  11. 2026-07-11 08:26 UTCEPSS rescore
  12. 2026-07-09 19:08 UTCEPSS rescore
  13. 2026-07-06 16:26 UTCEPSS rescore
  14. 2026-07-06 16:26 UTCEPSS rescore
  15. 2026-07-04 06:29 UTCEPSS rescore
  16. 2026-07-01 15:05 UTCEPSS rescore
  17. 2026-06-30 23:21 UTCEPSS rescore
  18. 2026-06-30 23:21 UTCEPSS rescore
  19. 2026-06-28 14:06 UTCEPSS rescore
  20. 2026-06-28 14:06 UTCEPSS rescore
  21. 2026-06-28 04:55 UTCEPSS rescore
  22. 2026-06-25 13:48 UTCEPSS rescore
  23. 2026-06-25 13:48 UTCEPSS rescore
  24. 2026-06-24 14:04 UTCEPSS rescore
  25. 2026-06-24 14:04 UTCEPSS rescore
Show 30 more
  1. 2026-06-24 06:23 UTCNVD updateCVSS v3 → 9.8 · severity → CRITICAL
  2. 2026-06-23 21:31 UTCEPSS rescore
  3. 2026-06-23 21:31 UTCEPSS rescore
  4. 2026-06-21 14:55 UTCEPSS rescore
  5. 2026-06-21 14:55 UTCEPSS rescore
  6. 2026-06-21 01:58 UTCEPSS rescore
  7. 2026-06-21 01:58 UTCEPSS rescore
  8. 2026-06-18 17:51 UTCEPSS rescore
  9. 2026-06-16 17:51 UTCEPSS rescore
  10. 2026-06-16 17:51 UTCEPSS rescore
  11. 2026-06-15 17:47 UTCEPSS rescore
  12. 2026-06-13 22:59 UTCEPSS rescore
  13. 2026-06-13 22:59 UTCEPSS rescore
  14. 2026-06-12 23:11 UTCEPSS rescore
  15. 2026-06-10 22:17 UTCEPSS rescore
  16. 2026-06-05 22:46 UTCEPSS rescore
  17. 2026-06-05 22:46 UTCEPSS rescore
  18. 2026-06-05 06:09 UTCEPSS rescore
  19. 2026-06-05 06:09 UTCEPSS rescore
  20. 2026-06-01 13:51 UTCEPSS rescore
  21. 2026-05-31 00:15 UTCEPSS rescore
  22. 2026-05-31 00:15 UTCEPSS rescore
  23. 2026-05-28 13:44 UTCEPSS rescore
  24. 2026-05-28 13:44 UTCEPSS rescore
  25. 2026-05-26 13:43 UTCEPSS rescore
  26. 2026-05-26 13:43 UTCEPSS rescore
  27. 2026-05-26 07:18 UTCEPSS rescore
  28. 2026-05-26 07:18 UTCEPSS rescore
  29. 2026-05-24 16:57 UTCEG score recompute
  30. 2026-05-24 16:57 UTCGHSA enrichment

Publicly available exploits

(2 references)

Working exploit code is in the public domain (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-51887
    First seen Mar 14, 2024

    Viessmann Vitogate 300 2.1.3.0 - Remote Code Execution (RCE)

    Open source ↗
  • Nucleihttp/cves/2023/CVE-2023-5222.yaml
    First seen Jan 1, 2023

    Viessmann Vitogate 300 - Hardcoded Password

    Open source ↗

Frequently asked(5)

What is CVE-2023-5222?
CVE-2023-5222 is a critical vulnerability published on September 27, 2023. 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…
When was CVE-2023-5222 disclosed?
CVE-2023-5222 was first published in the National Vulnerability Database on September 27, 2023, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-5222 actively exploited?
CVE-2023-5222 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 99.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2023-5222?
CVE-2023-5222 has a CVSS v3 base score of 9.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
How do I remediate CVE-2023-5222?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-5222, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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