CVE-2026-84479

CRITICALPre-NVD 9.19.1—
EchelonGraph scoreHIGH confidence

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-09-02. a secondary CVSS source baseline 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
9.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.1Exploit: Elevated riskExposed: 0

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

WWBN AVideo (current e01e41ecc and earlier) makes three login-time security controls depend solely on the client-supplied User-Agent header. The isAVideoEncoder()/isAVideoMobileApp() checks match HTTP_USER_AGENT against a hardcoded literal ("AVideoEncoder"/"AVideoMobileApp") with no IP check or shared secret. An attacker who submits valid credentials and sets User-Agent: AVideoEncoder bypasses two-factor authentication, skips brute-force captcha escalation, and avoids being recorded in the login/device audit history. No patch is available at the time of publication.

CVSS v3
9.1
EG Score
9.1(high)
EG Risk
72(Attend)
EG Risk 72/100SSVC: 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
Severity91% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
25%
KEV
Not listed

Published

September 1, 2026

Last Modified

September 8, 2026

Advisory Details (2)

Auto-updated Sep 15, 2026
🔬 Proof of concept available. Patch available. Sources: github.
github Patch Available🟡 PoC Available

2FA, brute-force captcha and login audit logging are all disabled by sending User-Agent: AVideoEncoder · Advisory · WWBN/AVideo · GitHub

https://github.com/WWBN/AVideo/security/advisories/GHSA-m9m3-gwh2-337c
generic

WWBN AVideo Authentication Bypass via User-Agent Header | Advisories | VulnCheck

https://www.vulncheck.com/advisories/wwbn-avideo-authentication-bypass-via-user-agent-header

Vendor Advisories for CVE-2026-84479(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 52× in last 7d / 136× 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 136 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-84479?
CVE-2026-84479 is a critical vulnerability published on September 1, 2026. WWBN AVideo (current e01e41ecc and earlier) makes three login-time security controls depend solely on the client-supplied User-Agent header. The isAVideoEncoder()/isAVideoMobileApp() checks match HTTPUSERAGENT against a hardcoded literal ("AVideoEncoder"/"AVideoMobileApp") with no IP check or…
When was CVE-2026-84479 disclosed?
CVE-2026-84479 was first published in the National Vulnerability Database on September 1, 2026, with the most recent update on September 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-84479 actively exploited?
CVE-2026-84479 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 75.1% of all scored CVEs.
What is the CVSS score of CVE-2026-84479?
CVE-2026-84479 has a CVSS v3 base score of 9.1 (NVD).
How do I remediate CVE-2026-84479?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-84479, 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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