CVE-2026-54211

CRITICALPre-NVD 9.59.5—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.6% (48th percentile of EPSS-scored CVEs). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 3 sources updated this week
9.5EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.6%CVSS: 9.5Exploit: None knownExposed services: Not assessed

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

Tobit Laboratories AG TeamDavid's Webbox application’s endpoint “//serverClient_close.html” is vulnerable to a buffer overflow vulnerability in multiple form data parameters. By submitting excessively long values in these parameters, an authenticated attacker can trigger a server crash, resulting in denial of service. Depending on the stack state or if a stack canary can be disclosed through another vulnerability, this buffer overflow could potentially be exploited for remote code execution, leading to full compromise of the server. This issue affects TeamDavid before Rollout 528.

Starting with Rollout 528 (June 30, 2026), the affected functionality is disabled by default and the vulnerabilities are therefore no longer exposed through this functionality.

CVSS v3
9.5
EG Score
9.5CRITICALmedium confidence
EG Risk
43
EG Risk 43/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity95% × 45%
Exploitation1% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
0.6%
EPSS %ILE
48th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 7, 2026

Last Modified

September 7, 2026

Advisory Details (3)

Auto-updated Oct 2, 2026
No patch confirmed yet.
generic

22 CVEs in TeamDavid® a "secure" M365 alternative - InfoGuard Labs

https://labs.infoguard.ch/posts/22-cves-in-david-a-secure-m365-alternative/
generic

Release Notes | TeamDavid

https://david.tobit.software/releasenotes

Vendor Advisories for CVE-2026-54211(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 26× in last 7d / 148× 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.

Showing the most recent 100 of 349 total refreshes for this CVE.

  1. 2026-10-05 08:16 UTCEG score recompute
  2. 2026-10-05 08:16 UTCGHSA enrichment
  3. 2026-10-04 23:22 UTCEPSS rescore
  4. 2026-10-04 23:12 UTCGHSA enrichment
  5. 2026-10-04 14:43 UTCGHSA enrichment
  6. 2026-10-04 10:17 UTCGHSA enrichment
  7. 2026-10-04 05:44 UTCEG score recompute
  8. 2026-10-04 05:44 UTCGHSA enrichment
  9. 2026-10-03 14:26 UTCEPSS rescore
  10. 2026-10-03 01:01 UTCEG score recompute
  11. 2026-10-03 01:01 UTCGHSA enrichment
  12. 2026-10-02 17:56 UTCEPSS rescore
  13. 2026-10-02 16:24 UTCGHSA enrichment
  14. 2026-10-02 16:22 UTCGHSA enrichment
  15. 2026-10-02 09:34 UTCEG score recompute
  16. 2026-10-02 09:34 UTCGHSA enrichment
  17. 2026-10-01 19:50 UTCEPSS rescore
  18. 2026-10-01 12:11 UTCGHSA enrichment
  19. 2026-10-01 07:37 UTCGHSA enrichment
  20. 2026-10-01 03:17 UTCGHSA enrichment
  21. 2026-09-30 22:56 UTCEG score recompute
  22. 2026-09-30 22:56 UTCGHSA enrichment
  23. 2026-09-30 15:03 UTCEPSS rescore
  24. 2026-09-29 15:22 UTCEPSS rescore
  25. 2026-09-29 05:46 UTCEG score recompute
Show 75 more
  1. 2026-09-29 05:46 UTCGHSA enrichment
  2. 2026-09-28 13:51 UTCEPSS rescore
  3. 2026-09-28 11:27 UTCGHSA enrichment
  4. 2026-09-28 06:52 UTCGHSA enrichment
  5. 2026-09-28 02:27 UTCGHSA enrichment
  6. 2026-09-27 17:11 UTCEG score recompute
  7. 2026-09-27 17:11 UTCGHSA enrichment
  8. 2026-09-27 13:48 UTCEPSS rescore
  9. 2026-09-26 15:59 UTCEPSS rescore
  10. 2026-09-25 08:40 UTCGHSA enrichment
  11. 2026-09-25 04:16 UTCEG score recompute
  12. 2026-09-25 04:16 UTCGHSA enrichment
  13. 2026-09-24 14:04 UTCEPSS rescore
  14. 2026-09-24 10:20 UTCGHSA enrichment
  15. 2026-09-24 05:59 UTCGHSA enrichment
  16. 2026-09-24 01:38 UTCGHSA enrichment
  17. 2026-09-23 21:16 UTCEG score recompute
  18. 2026-09-23 21:16 UTCGHSA enrichment
  19. 2026-09-23 17:54 UTCEPSS rescore
  20. 2026-09-23 14:46 UTCGHSA enrichment
  21. 2026-09-23 10:23 UTCGHSA enrichment
  22. 2026-09-23 06:00 UTCGHSA enrichment
  23. 2026-09-23 01:40 UTCGHSA enrichment
  24. 2026-09-22 21:19 UTCGHSA enrichment
  25. 2026-09-22 15:34 UTCEG score recompute
  26. 2026-09-22 15:34 UTCGHSA enrichment
  27. 2026-09-22 11:13 UTCGHSA enrichment
  28. 2026-09-22 05:10 UTCGHSA enrichment
  29. 2026-09-22 00:45 UTCEG score recompute
  30. 2026-09-22 00:45 UTCGHSA enrichment
  31. 2026-09-21 12:06 UTCGHSA enrichment
  32. 2026-09-20 20:33 UTCEG score recompute
  33. 2026-09-20 20:33 UTCGHSA enrichment
  34. 2026-09-20 20:16 UTCEPSS rescore
  35. 2026-09-20 10:55 UTCGHSA enrichment
  36. 2026-09-20 02:15 UTCGHSA enrichment
  37. 2026-09-19 21:55 UTCGHSA enrichment
  38. 2026-09-19 17:30 UTCEG score recompute
  39. 2026-09-19 17:30 UTCGHSA enrichment
  40. 2026-09-19 12:58 UTCGHSA enrichment
  41. 2026-09-19 08:08 UTCGHSA enrichment
  42. 2026-09-19 03:46 UTCGHSA enrichment
  43. 2026-09-18 23:26 UTCEG score recompute
  44. 2026-09-18 23:26 UTCGHSA enrichment
  45. 2026-09-18 19:28 UTCEPSS rescore
  46. 2026-09-18 19:04 UTCGHSA enrichment
  47. 2026-09-18 14:43 UTCGHSA enrichment
  48. 2026-09-18 09:39 UTCGHSA enrichment
  49. 2026-09-18 05:16 UTCGHSA enrichment
  50. 2026-09-18 00:55 UTCEG score recompute
  51. 2026-09-18 00:55 UTCGHSA enrichment
  52. 2026-09-17 19:31 UTCEPSS rescore
  53. 2026-09-17 15:11 UTCGHSA enrichment
  54. 2026-09-17 09:36 UTCGHSA enrichment
  55. 2026-09-17 05:15 UTCGHSA enrichment
  56. 2026-09-17 00:54 UTCEG score recompute
  57. 2026-09-17 00:54 UTCGHSA enrichment
  58. 2026-09-16 14:08 UTCEPSS rescore
  59. 2026-09-16 11:42 UTCGHSA enrichment
  60. 2026-09-16 07:15 UTCEG score recompute
  61. 2026-09-16 07:14 UTCGHSA enrichment
  62. 2026-09-16 05:15 UTCEPSS rescore
  63. 2026-09-16 02:52 UTCGHSA enrichment
  64. 2026-09-15 14:16 UTCGHSA enrichment
  65. 2026-09-15 06:35 UTCEG score recompute
  66. 2026-09-15 06:35 UTCGHSA enrichment
  67. 2026-09-15 01:00 UTCGHSA enrichment
  68. 2026-09-14 13:06 UTCGHSA enrichment
  69. 2026-09-14 08:34 UTCGHSA enrichment
  70. 2026-09-14 04:14 UTCGHSA enrichment
  71. 2026-09-13 23:53 UTCGHSA enrichment
  72. 2026-09-13 19:33 UTCEG score recompute
  73. 2026-09-13 19:32 UTCGHSA enrichment
  74. 2026-09-13 16:47 UTCEPSS rescore
  75. 2026-09-13 15:11 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2026-54211?
CVE-2026-54211 is a critical vulnerability published on August 7, 2026. Tobit Laboratories AG TeamDavid's Webbox application’s endpoint “//serverClient_close.html” is vulnerable to a buffer overflow vulnerability in multiple form data parameters. By submitting excessively long values in these parameters, an authenticated attacker can trigger a server crash, resulting…
When was CVE-2026-54211 disclosed?
CVE-2026-54211 was first published on August 7, 2026, with the most recent update on September 7, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-54211 actively exploited?
CVE-2026-54211 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.6% probability of exploitation in the next 30 days (48th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-54211?
CVE-2026-54211 has a CVSS base score of 9.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-54211?
No fix for CVE-2026-54211 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-54211 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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