CVE-2026-51821

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-07-14. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this weekElevated
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: Elevated riskExposed: 0

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

SQL Injection vulnerability in Shenzhou Shihan Video Conference System v.1.0 allows a remote attacker to execute arbitrary code via the /user/getUserLogin endpoint

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
75(Attend)
EG Risk 75/100SSVC: Attend

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
Severity98% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
1%
EPSS %ILE
53%
KEV
Not listed

Published

July 13, 2026

Last Modified

July 15, 2026

Advisory Details (2)

Auto-updated Aug 29, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

SQL Injection in Front-end Login Page of Shenzhou Shihan Video Conference System · Issue #2 · sign9981/CVE · GitHub

https://github.com/sign9981/CVE/issues/2
generic

博文阅读密码验证 - 博客园

https://www.cnblogs.com/goww/p/19942271

Vendor Advisories for CVE-2026-51821(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 32× in last 7d / 214× 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 279 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-51821?
CVE-2026-51821 is a critical vulnerability published on July 13, 2026. SQL Injection vulnerability in Shenzhou Shihan Video Conference System v.1.0 allows a remote attacker to execute arbitrary code via the /user/getUserLogin endpoint
When was CVE-2026-51821 disclosed?
CVE-2026-51821 was first published in the National Vulnerability Database on July 13, 2026, with the most recent update on July 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-51821 actively exploited?
CVE-2026-51821 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 47.4% of all scored CVEs.
What is the CVSS score of CVE-2026-51821?
CVE-2026-51821 has a CVSS v3.1 base score of 9.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-51821?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-51821, 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.

Dependency Blast Radius

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