CVE-2026-78174

CRITICALPre-NVD 9.39.3—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 72% of all CVEs by exploit prediction. 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
9.3EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.3Exploit: None knownExposed: 0

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

WatchGuard Dimension records unredacted session identifiers for logged-in users in its web UI diagnostic log. A low-privileged Dimension Administrator can retrieve this log and extract a Super Administrator's session token while that administrator is logged in, enabling account takeover.

CVSS v3
9.3
EG Score
9.3(medium)
EG Risk
46(Track)
EG Risk 46/100SSVC: Track

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
Severity93% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
28%
KEV
Not listed

Published

August 27, 2026

Last Modified

August 28, 2026

Advisory Details (1)

Auto-updated Sep 14, 2026
⚠️ Active exploitation confirmed. No patch confirmed yet.
generic🔴 Active Exploitation

CVE-2026-78174 — WatchGuard Dimension Session Hijack via Exposed Session Tokens in Diagnostic Logs

https://psirt.watchguard.com/CVE-2026-78174

Vendor Advisories for CVE-2026-78174(1)

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

Weakness Classification(3)

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

Data Freshness Timeline

(refreshed 53× in last 7d / 184× 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 184 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-78174?
CVE-2026-78174 is a critical vulnerability published on August 27, 2026. WatchGuard Dimension records unredacted session identifiers for logged-in users in its web UI diagnostic log. A low-privileged Dimension Administrator can retrieve this log and extract a Super Administrator's session token while that administrator is logged in, enabling account takeover.
When was CVE-2026-78174 disclosed?
CVE-2026-78174 was first published in the National Vulnerability Database on August 27, 2026, with the most recent update on August 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-78174 actively exploited?
CVE-2026-78174 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 71.8% of all scored CVEs.
What is the CVSS score of CVE-2026-78174?
CVE-2026-78174 has a CVSS v3 base score of 9.3 (NVD).
How do I remediate CVE-2026-78174?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-78174, 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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