CVE-2026-78617

MEDIUMPre-NVD 6.36.3—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 74% 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
6.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.3Exploit: None knownExposed: 0

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

WatchGuard Dimension's web login endpoint does not enforce effective rate-limiting or account lockout by default allowing a remote attacker to perform automated password guessing against user accounts. If the account lockout setting is enabled, brute-force attempts are blocked after a defined number of failed attempts, but this setting is not enabled by default.

CVSS v3
6.3
EG Score
6.3(medium)
EG Risk
33(Track)
EG Risk 33/100SSVC: 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
Severity63% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
26%
KEV
Not listed

Published

August 27, 2026

Last Modified

August 28, 2026

Advisory Details (1)

Auto-updated Aug 28, 2026
⚠️ Active exploitation confirmed. No patch confirmed yet.
generic🔴 Active Exploitation

CVE-2026-78617 — WatchGuard Dimension Web UI Authentication Brute-Force Due to Missing Rate Limiting

https://psirt.watchguard.com/CVE-2026-78617

Vendor Advisories for CVE-2026-78617(1)

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

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 19× in last 7d / 61× 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.

  1. 2026-09-19 18:04 UTCEG score recompute
  2. 2026-09-19 18:04 UTCGHSA enrichment
  3. 2026-09-18 19:28 UTCEPSS rescore
  4. 2026-09-18 16:20 UTCEG score recompute
  5. 2026-09-18 16:20 UTCGHSA enrichment
  6. 2026-09-17 14:33 UTCEG score recompute
  7. 2026-09-17 14:33 UTCGHSA enrichment
  8. 2026-09-16 14:08 UTCEPSS rescore
  9. 2026-09-16 12:49 UTCEG score recompute
  10. 2026-09-16 12:49 UTCGHSA enrichment
  11. 2026-09-16 05:15 UTCEPSS rescore
  12. 2026-09-15 11:06 UTCEG score recompute
  13. 2026-09-15 11:06 UTCGHSA enrichment
  14. 2026-09-15 03:12 UTCEPSS rescore
  15. 2026-09-15 03:12 UTCEPSS rescore
  16. 2026-09-14 09:10 UTCEG score recompute
  17. 2026-09-14 09:10 UTCGHSA enrichment
  18. 2026-09-13 07:27 UTCEG score recompute
  19. 2026-09-13 07:27 UTCGHSA enrichment
  20. 2026-09-12 05:45 UTCEG score recompute
  21. 2026-09-12 05:45 UTCGHSA enrichment
  22. 2026-09-11 14:53 UTCEPSS rescore
  23. 2026-09-11 14:53 UTCEPSS rescore
  24. 2026-09-11 04:02 UTCEG score recompute
  25. 2026-09-11 04:02 UTCGHSA enrichment
Show 36 more
  1. 2026-09-10 02:19 UTCGHSA enrichment
  2. 2026-09-09 00:36 UTCEG score recompute
  3. 2026-09-09 00:36 UTCGHSA enrichment
  4. 2026-09-08 22:01 UTCEPSS rescore
  5. 2026-09-07 15:04 UTCEG score recompute
  6. 2026-09-07 15:04 UTCGHSA enrichment
  7. 2026-09-06 13:48 UTCEPSS rescore
  8. 2026-09-06 10:33 UTCEG score recompute
  9. 2026-09-06 10:33 UTCGHSA enrichment
  10. 2026-09-05 08:51 UTCEG score recompute
  11. 2026-09-05 08:51 UTCGHSA enrichment
  12. 2026-09-04 07:08 UTCEG score recompute
  13. 2026-09-04 07:08 UTCGHSA enrichment
  14. 2026-09-04 05:07 UTCEPSS rescore
  15. 2026-09-03 05:20 UTCEG score recompute
  16. 2026-09-03 05:20 UTCGHSA enrichment
  17. 2026-09-02 14:12 UTCEPSS rescore
  18. 2026-09-02 03:34 UTCEG score recompute
  19. 2026-09-02 03:34 UTCGHSA enrichment
  20. 2026-09-01 13:54 UTCEPSS rescore
  21. 2026-09-01 04:40 UTCEPSS rescore
  22. 2026-09-01 04:40 UTCEPSS rescore
  23. 2026-09-01 01:49 UTCGHSA enrichment
  24. 2026-08-31 00:03 UTCEG score recompute
  25. 2026-08-31 00:03 UTCGHSA enrichment
  26. 2026-08-30 19:18 UTCEPSS rescore
  27. 2026-08-30 19:17 UTCEPSS rescore
  28. 2026-08-30 01:22 UTCEPSS rescore
  29. 2026-08-29 22:20 UTCEG score recompute
  30. 2026-08-29 22:20 UTCGHSA enrichment
  31. 2026-08-28 21:42 UTCEPSS rescore
  32. 2026-08-28 20:37 UTCGHSA enrichment
  33. 2026-08-28 18:58 UTCGHSA enrichment
  34. 2026-08-28 02:18 UTCEG score recompute
  35. 2026-08-28 02:10 UTCEG score recompute
  36. 2026-08-28 02:07 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-78617?
CVE-2026-78617 is a medium vulnerability published on August 27, 2026. WatchGuard Dimension's web login endpoint does not enforce effective rate-limiting or account lockout by default allowing a remote attacker to perform automated password guessing against user accounts. If the account lockout setting is enabled, brute-force attempts are blocked after a defined…
When was CVE-2026-78617 disclosed?
CVE-2026-78617 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-2026-78617 actively exploited?
CVE-2026-78617 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 74.5% of all scored CVEs.
What is the CVSS score of CVE-2026-78617?
CVE-2026-78617 has a CVSS v3 base score of 6.3 (NVD).
How do I remediate CVE-2026-78617?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-78617, 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

Explore the affected products and dependency analysis for CVE-2026-78617

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