CVE-2026-78010

HIGHPre-NVD 8.78.7
EchelonGraph scoreMEDIUM confidence

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

This high-severity CVE scores 8.7 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5% (44th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
Trending — 3 sources updated this week
8.7EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 8.7Exploit: None knownExposed services: Not assessed

Fireware OS 2026.3.1, Fireware OS 2026.2.2, Fireware OS 12.12.2, Fireware OS 12.5.20 (from the CVE record's solution, WatchGuard Technologies, Inc.) — apply it.

A stack-based buffer overflow vulnerability in the WatchGuard Fireware OS iked process iallows a remote unauthenticated attacker to create a Denial of Service (DoS) condition in VPN processing by sending specially crafted network traffic.

CVSS v3
8.7
EG Score
8.7HIGHmedium confidence
EG Risk
39
EG Risk 39/100

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)
Severity87% × 45%
The EG Score, 8.7 of 10.
Exploitation0.5% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (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: Fireware OS 2026.3.1, Fireware OS 2026.2.2, Fireware OS 12.12.2, Fireware OS 12.5.20 (from the CVE record's solution, WatchGuard Technologies, Inc.). Apply it within your standard update timelines.
EPSS PROB
0.5%
EPSS %ILE
44th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

Fireware OS 2026.3.1, Fireware OS 2026.2.2, Fireware OS 12.12.2, Fireware OS 12.5.20 (from the CVE record's solution, WatchGuard Technologies, Inc.). Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (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)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (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 27, 2026

Last Modified

September 3, 2026

Advisory Details (1)

Auto-updated Aug 28, 2026
Fix named in the CVE record's solution (WatchGuard Technologies, Inc.).
Web page

CVE-2026-78010 — Fireware OS Stack-Based Buffer Overflow in iked Allows Unauthenticated Denial of Service

https://psirt.watchguard.com/CVE-2026-78010

Vendor Advisories for CVE-2026-78010(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 20× in last 7d / 107× 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 181 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 81 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  2. 2026-10-13 06:52 UTCEG score recompute
  3. 2026-10-13 06:52 UTCGHSA enrichmentGHSA-hjxc-cxcg-9xjh · GitHub severity HIGH
  4. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  5. 2026-10-12 15:37 UTCEG score recompute
  6. 2026-10-11 19:23 UTCEG score recompute
  7. 2026-10-11 16:39 UTCEG score recompute
  8. 2026-10-11 13:57 UTCEG score recompute
  9. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  10. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  11. 2026-10-10 13:15 UTCGHSA enrichmentGHSA-hjxc-cxcg-9xjh · GitHub severity HIGH
  12. 2026-10-10 01:43 UTCEG score recompute
  13. 2026-10-10 01:43 UTCGHSA enrichmentGHSA-hjxc-cxcg-9xjh · GitHub severity HIGH
  14. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  15. 2026-10-09 02:52 UTCEG score recompute
  16. 2026-10-09 02:52 UTCGHSA enrichmentGHSA-hjxc-cxcg-9xjh · GitHub severity HIGH
  17. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  18. 2026-10-08 01:10 UTCEG score recompute
  19. 2026-10-08 01:10 UTCGHSA enrichmentGHSA-hjxc-cxcg-9xjh · GitHub severity HIGH
  20. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  21. 2026-10-07 06:45 UTCGHSA enrichmentGHSA-hjxc-cxcg-9xjh · GitHub severity HIGH
  22. 2026-10-06 19:13 UTCEG score recompute
  23. 2026-10-06 19:13 UTCGHSA enrichmentGHSA-hjxc-cxcg-9xjh · GitHub severity HIGH
  24. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  25. 2026-10-06 07:29 UTCGHSA enrichmentGHSA-hjxc-cxcg-9xjh · GitHub severity HIGH
Show 75 more
  1. 2026-10-05 18:54 UTCEG score recompute
  2. 2026-10-05 18:54 UTCGHSA enrichmentGHSA-hjxc-cxcg-9xjh · GitHub severity HIGH
  3. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  4. 2026-10-05 07:12 UTCEG score recompute
  5. 2026-10-05 07:12 UTCGHSA enrichmentGHSA-hjxc-cxcg-9xjh · GitHub severity HIGH
  6. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  7. 2026-10-04 19:38 UTCGHSA enrichmentGHSA-hjxc-cxcg-9xjh · GitHub severity HIGH
  8. 2026-10-04 06:52 UTCGHSA enrichmentGHSA-hjxc-cxcg-9xjh · GitHub severity HIGH
  9. 2026-10-03 19:20 UTCEG score recompute
  10. 2026-10-03 19:20 UTCGHSA enrichmentGHSA-hjxc-cxcg-9xjh · GitHub severity HIGH
  11. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  12. 2026-10-03 06:27 UTCGHSA enrichmentGHSA-hjxc-cxcg-9xjh · GitHub severity HIGH
  13. 2026-10-02 18:55 UTCEG score recompute
  14. 2026-10-02 18:55 UTCGHSA enrichmentGHSA-hjxc-cxcg-9xjh · GitHub severity HIGH
  15. 2026-10-02 07:23 UTCGHSA enrichmentGHSA-hjxc-cxcg-9xjh · GitHub severity HIGH
  16. 2026-10-01 19:51 UTCEG score recompute
  17. 2026-10-01 19:51 UTCGHSA enrichmentGHSA-hjxc-cxcg-9xjh · GitHub severity HIGH
  18. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  19. 2026-10-01 07:24 UTCGHSA enrichmentGHSA-hjxc-cxcg-9xjh · GitHub severity HIGH
  20. 2026-09-30 19:53 UTCEG score recompute
  21. 2026-09-30 19:53 UTCGHSA enrichmentGHSA-hjxc-cxcg-9xjh · GitHub severity HIGH
  22. 2026-09-30 04:20 UTCEG score recompute
  23. 2026-09-30 04:20 UTCGHSA enrichmentGHSA-hjxc-cxcg-9xjh · GitHub severity HIGH
  24. 2026-09-29 15:24 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  25. 2026-09-29 14:14 UTCGHSA enrichmentGHSA-hjxc-cxcg-9xjh · GitHub severity HIGH
  26. 2026-09-29 02:07 UTCEG score recompute
  27. 2026-09-29 02:07 UTCGHSA enrichmentGHSA-hjxc-cxcg-9xjh · GitHub severity HIGH
  28. 2026-09-28 14:36 UTCEG score recompute
  29. 2026-09-28 14:36 UTCGHSA enrichmentGHSA-hjxc-cxcg-9xjh · GitHub severity HIGH
  30. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  31. 2026-09-28 03:04 UTCGHSA enrichmentGHSA-hjxc-cxcg-9xjh · GitHub severity HIGH
  32. 2026-09-27 15:27 UTCEG score recompute
  33. 2026-09-27 15:26 UTCGHSA enrichmentGHSA-hjxc-cxcg-9xjh · GitHub severity HIGH
  34. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  35. 2026-09-27 03:19 UTCEG score recompute
  36. 2026-09-27 03:19 UTCGHSA enrichmentGHSA-hjxc-cxcg-9xjh · GitHub severity HIGH
  37. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  38. 2026-09-26 15:47 UTCEG score recompute
  39. 2026-09-26 15:47 UTCGHSA enrichmentGHSA-hjxc-cxcg-9xjh · GitHub severity HIGH
  40. 2026-09-26 00:28 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  41. 2026-09-25 15:50 UTCGHSA enrichmentGHSA-hjxc-cxcg-9xjh · GitHub severity HIGH
  42. 2026-09-25 04:19 UTCGHSA enrichmentGHSA-hjxc-cxcg-9xjh · GitHub severity HIGH
  43. 2026-09-24 16:47 UTCEG score recompute
  44. 2026-09-24 16:47 UTCGHSA enrichmentGHSA-hjxc-cxcg-9xjh · GitHub severity HIGH
  45. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  46. 2026-09-24 05:13 UTCGHSA enrichmentGHSA-hjxc-cxcg-9xjh · GitHub severity HIGH
  47. 2026-09-23 17:41 UTCGHSA enrichmentGHSA-hjxc-cxcg-9xjh · GitHub severity HIGH
  48. 2026-09-23 05:53 UTCGHSA enrichmentGHSA-hjxc-cxcg-9xjh · GitHub severity HIGH
  49. 2026-09-22 18:21 UTCEG score recompute
  50. 2026-09-22 18:21 UTCGHSA enrichmentGHSA-hjxc-cxcg-9xjh · GitHub severity HIGH
  51. 2026-09-22 16:01 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  52. 2026-09-22 06:38 UTCEG score recompute
  53. 2026-09-22 06:38 UTCGHSA enrichmentGHSA-hjxc-cxcg-9xjh · GitHub severity HIGH
  54. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  55. 2026-09-21 19:06 UTCGHSA enrichmentGHSA-hjxc-cxcg-9xjh · GitHub severity HIGH
  56. 2026-09-21 07:34 UTCEG score recompute
  57. 2026-09-21 07:34 UTCGHSA enrichmentGHSA-hjxc-cxcg-9xjh · GitHub severity HIGH
  58. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  59. 2026-09-20 19:50 UTCGHSA enrichmentGHSA-hjxc-cxcg-9xjh · GitHub severity HIGH
  60. 2026-09-20 08:18 UTCGHSA enrichmentGHSA-hjxc-cxcg-9xjh · GitHub severity HIGH
  61. 2026-09-19 19:00 UTCEG score recompute
  62. 2026-09-19 19:00 UTCGHSA enrichmentGHSA-hjxc-cxcg-9xjh · GitHub severity HIGH
  63. 2026-09-19 07:29 UTCGHSA enrichmentGHSA-hjxc-cxcg-9xjh · GitHub severity HIGH
  64. 2026-09-18 19:57 UTCEG score recompute
  65. 2026-09-18 19:57 UTCGHSA enrichmentGHSA-hjxc-cxcg-9xjh · GitHub severity HIGH
  66. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  67. 2026-09-18 08:25 UTCGHSA enrichmentGHSA-hjxc-cxcg-9xjh · GitHub severity HIGH
  68. 2026-09-17 20:53 UTCEG score recompute
  69. 2026-09-17 20:53 UTCGHSA enrichmentGHSA-hjxc-cxcg-9xjh · GitHub severity HIGH
  70. 2026-09-17 06:49 UTCGHSA enrichmentGHSA-hjxc-cxcg-9xjh · GitHub severity HIGH
  71. 2026-09-16 19:01 UTCEG score recompute
  72. 2026-09-16 19:01 UTCGHSA enrichmentGHSA-hjxc-cxcg-9xjh · GitHub severity HIGH
  73. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  74. 2026-09-16 07:26 UTCEG score recompute
  75. 2026-09-16 07:25 UTCGHSA enrichmentGHSA-hjxc-cxcg-9xjh · GitHub severity HIGH

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-78010?
CVE-2026-78010 is a high-severity vulnerability; its CVE record was published on August 27, 2026. A stack-based buffer overflow vulnerability in the WatchGuard Fireware OS iked process iallows a remote unauthenticated attacker to create a Denial of Service (DoS) condition in VPN processing by sending specially crafted network traffic.
When was CVE-2026-78010 made public?
CVE-2026-78010 was made public on August 27, 2026: that is the date its CVE record's CNA, WatchGuard Technologies, Inc., gives for when the vulnerability was made public. The CVE record itself was published on August 27, 2026. EchelonGraph's copy of the record carries a last-modified date of September 3, 2026; the record at its source may have been updated since.
Is CVE-2026-78010 actively exploited?
CVE-2026-78010 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (44th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-78010?
CVE-2026-78010 has a CVSS base score of 8.7 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-78010?
The CVE record's solution for CVE-2026-78010, written by its CNA WatchGuard Technologies, Inc., names the fix: "Fireware OS 2026.3.1, Fireware OS 2026.2.2, Fireware OS 12.12.2, Fireware OS 12.5.20". The vendor advisories EchelonGraph has for CVE-2026-78010 are linked in the Vendor Advisories panel on this page.

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