CVE-2026-77552

CRITICALPre-NVD 9.89.8
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-28. A secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Trending — 3 sources updated this week
9.8EG
EchelonGraph verdictPlan mitigationRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1.6%CVSS: 9.8Exploit: None knownExposed services: Not assessed

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

The CVE record's CNA (Ubiquiti, Inc.) lists Ubiquiti Inc UniFi Enterprise Audio/Video Bridge versions before 1.0.11 as affected. No release containing a fix is confirmed on record.

A malicious actor with access to the network could exploit an Improper Input Validation vulnerability found in UniFi Enterprise Audio/Video Bridge to execute a Command Injection on the device.

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
60
EG Risk 60/100

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 (value × EchelonGraph’s weight)
Severity98% × 45%
The EG Score, 9.8 of 10.
Exploitation1.6% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: No fix is confirmed yet. Restrict network exposure of the affected system within your standard update timelines at low or medium mission impact and sooner than that at high, and watch for a fix.
EPSS PROB
1.6%
EPSS %ILE
75th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

No fix is confirmed yet. Restrict network exposure of the affected system within your standard update timelines at low or medium mission impact and sooner than that at high, and watch for a fix.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)3 days if the affected system is publicly exposed; 60 days if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

August 26, 2026

Last Modified

August 28, 2026

Advisory Details (1)

Auto-updated Oct 9, 2026
No fix on record yet.
Web page

067 | Ubiquiti Community

https://community.ui.com/releases/Security-Advisory-Bulletin-067/fc4a3488-7c43-4628-8bab-f715e96dbfc9

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 27× in last 7d / 185× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 317 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 217 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-14 09:29 UTCEG score recompute
  2. 2026-10-14 09:28 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  3. 2026-10-13 16:35 UTCEPSS rescoreEPSS 1.6% · 75th percentile
  4. 2026-10-13 07:03 UTCEG score recompute
  5. 2026-10-13 07:03 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  6. 2026-10-12 16:35 UTCEPSS rescoreEPSS 1.6% · 75th percentile
  7. 2026-10-12 15:37 UTCEG score recompute
  8. 2026-10-12 05:29 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  9. 2026-10-11 19:23 UTCEG score recompute
  10. 2026-10-11 16:39 UTCEG score recompute
  11. 2026-10-11 13:57 UTCEG score recompute
  12. 2026-10-11 13:49 UTCEPSS rescoreEPSS 1.6% · 75th percentile
  13. 2026-10-10 20:00 UTCEPSS rescoreEPSS 1.6% · 75th percentile
  14. 2026-10-10 15:16 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  15. 2026-10-10 11:08 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  16. 2026-10-10 06:38 UTCEG score recompute
  17. 2026-10-10 06:38 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  18. 2026-10-09 20:07 UTCEPSS rescoreEPSS 1.6% · 75th percentile
  19. 2026-10-09 07:32 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  20. 2026-10-09 03:28 UTCEG score recompute
  21. 2026-10-09 03:27 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  22. 2026-10-08 17:13 UTCEPSS rescoreEPSS 1.6% · 75th percentile
  23. 2026-10-08 10:04 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  24. 2026-10-08 06:00 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  25. 2026-10-08 01:58 UTCEG score recompute
Show 75 more
  1. 2026-10-08 01:58 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  2. 2026-10-07 23:48 UTCEPSS rescoreEPSS 1.6% · 75th percentile
  3. 2026-10-07 09:26 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  4. 2026-10-07 05:11 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  5. 2026-10-07 01:08 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  6. 2026-10-06 20:44 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  7. 2026-10-06 15:58 UTCEG score recompute
  8. 2026-10-06 15:58 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  9. 2026-10-06 15:18 UTCEPSS rescoreEPSS 1.6% · 75th percentile
  10. 2026-10-06 11:51 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  11. 2026-10-06 07:36 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  12. 2026-10-06 01:45 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  13. 2026-10-05 20:59 UTCEG score recompute
  14. 2026-10-05 20:59 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  15. 2026-10-05 17:43 UTCEPSS rescoreEPSS 1.6% · 75th percentile
  16. 2026-10-05 16:55 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  17. 2026-10-05 11:54 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  18. 2026-10-05 07:51 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  19. 2026-10-05 03:47 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  20. 2026-10-04 23:45 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  21. 2026-10-04 19:42 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  22. 2026-10-04 14:39 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  23. 2026-10-04 10:05 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  24. 2026-10-04 06:03 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  25. 2026-10-04 02:00 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  26. 2026-10-03 20:15 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  27. 2026-10-03 16:12 UTCEG score recompute
  28. 2026-10-03 16:12 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  29. 2026-10-03 14:26 UTCEPSS rescoreEPSS 1.6% · 75th percentile
  30. 2026-10-03 07:07 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  31. 2026-10-03 03:04 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  32. 2026-10-02 23:01 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  33. 2026-10-02 18:52 UTCEG score recompute
  34. 2026-10-02 18:52 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  35. 2026-10-02 14:48 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  36. 2026-10-02 10:25 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  37. 2026-10-02 06:23 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  38. 2026-10-02 01:15 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  39. 2026-10-01 19:57 UTCEG score recompute
  40. 2026-10-01 19:57 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  41. 2026-10-01 19:50 UTCEPSS rescoreEPSS 1.6% · 75th percentile
  42. 2026-10-01 13:39 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  43. 2026-10-01 09:36 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  44. 2026-10-01 05:33 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  45. 2026-10-01 01:04 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  46. 2026-09-30 19:59 UTCEG score recompute
  47. 2026-09-30 19:59 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  48. 2026-09-30 10:12 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  49. 2026-09-30 06:10 UTCEG score recompute
  50. 2026-09-30 06:10 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  51. 2026-09-29 15:24 UTCEPSS rescoreEPSS 1.6% · 75th percentile
  52. 2026-09-29 12:32 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  53. 2026-09-29 05:28 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  54. 2026-09-29 01:26 UTCEG score recompute
  55. 2026-09-29 01:26 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  56. 2026-09-28 21:21 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  57. 2026-09-28 15:58 UTCEG score recompute
  58. 2026-09-28 15:58 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  59. 2026-09-28 13:52 UTCEPSS rescoreEPSS 1.6% · 75th percentile
  60. 2026-09-28 11:55 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  61. 2026-09-28 07:53 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  62. 2026-09-28 03:50 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  63. 2026-09-27 23:48 UTCEG score recompute
  64. 2026-09-27 23:48 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  65. 2026-09-27 19:41 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  66. 2026-09-27 15:38 UTCEG score recompute
  67. 2026-09-27 15:38 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  68. 2026-09-27 13:48 UTCEPSS rescoreEPSS 1.6% · 75th percentile
  69. 2026-09-27 10:55 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  70. 2026-09-27 06:46 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  71. 2026-09-27 02:13 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  72. 2026-09-26 21:10 UTCEG score recompute
  73. 2026-09-26 21:10 UTCGHSA enrichmentGHSA-wv3m-p56q-v92r · GitHub severity CRITICAL · GitHub CVSS 9.8
  74. 2026-09-26 15:59 UTCEPSS rescoreEPSS 1.6% · 75th percentile
  75. 2026-09-26 00:28 UTCEPSS rescoreEPSS 1.6% · 75th percentile

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Frequently asked(5)

What is CVE-2026-77552?
CVE-2026-77552 is a critical-severity vulnerability; its CVE record was published on August 26, 2026. A malicious actor with access to the network could exploit an Improper Input Validation vulnerability found in UniFi Enterprise Audio/Video Bridge to execute a Command Injection on the device.
When was the CVE record for CVE-2026-77552 published?
The CVE record for CVE-2026-77552 was published on August 26, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of August 28, 2026; the record at its source may have been updated since.
Is CVE-2026-77552 actively exploited?
CVE-2026-77552 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.6% probability of exploitation in the next 30 days (75th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-77552?
CVE-2026-77552 has a CVSS base score of 9.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-77552?
No fix for CVE-2026-77552 is confirmed yet. Until one is published, restrict network exposure of the affected system — for example, keep it off the internet or limit it to trusted networks — and watch for a fix. The CVE record's CNA (Ubiquiti, Inc.) lists Ubiquiti Inc UniFi Enterprise Audio/Video Bridge versions before 1.0.11 as affected. No release containing a fix is confirmed on record.

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