CVE-2026-13728

MEDIUMNVD 4.44.4
EchelonGraph scoreMEDIUM confidence

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

Score 4.4 from GitHub Security Advisory published 2026-07-03. NVD baseline CVSS 4.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
4.4EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 4.4Exploit: None knownExposed services: Not assessed

Fireware OS 2026.2.1, Fireware OS 12.12.1, Fireware OS 12.11.9 (from the CVE record's solution, WatchGuard Technologies, Inc.) — apply it.

In exception circumstances, WatchGuard Fireware OS on a FireCluster may use a hard-coded encryption key to encrypt saved credentials for Access Portal resources.

This vulnerability does not affect devices that do not support the Access Portal feature or standalone Fireboxes not deployed in a FireCluster.

CVSS v3
4.4
EG Score
4.4MEDIUMmedium confidence
EG Risk
20
EG Risk 20/100

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)
Severity44% × 45%
The EG Score, 4.4 of 10.
Exploitation0.2% × 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 2026.2.1, Fireware OS 12.12.1, Fireware OS 12.11.9 (from the CVE record's solution, WatchGuard Technologies, Inc.). Apply it within your standard update timelines.
EPSS PROB
0.2%
EPSS %ILE
12th
KEV
Not listed

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

Fireware OS 2026.2.1, Fireware OS 12.12.1, Fireware OS 12.11.9 (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

July 3, 2026

Last Modified

August 28, 2026

Advisory Details (1)

Auto-updated Jul 6, 2026
Fix named in the CVE record's solution (WatchGuard Technologies, Inc.).
Web page

WatchGuard Firebox Hardcoded Fallback Encryption Key in Access Portal Resource Credential Database | WatchGuard Technologies

https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-00025

Vendor Advisories for CVE-2026-13728(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 11× in last 7d / 31× 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. 2026-10-12 16:34 UTCEG score recompute
  2. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  3. 2026-10-11 20:11 UTCEG score recompute
  4. 2026-10-11 18:23 UTCEG score recompute
  5. 2026-10-11 14:57 UTCEG score recompute
  6. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  7. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  8. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  9. 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  10. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  11. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  12. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  13. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  14. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  15. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  16. 2026-09-30 15:02 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  17. 2026-09-29 15:20 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  18. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  19. 2026-09-27 13:47 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  20. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  21. 2026-09-23 13:47 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  22. 2026-09-23 06:37 UTCEG score recompute
  23. 2026-09-23 06:37 UTCGHSA enrichmentGHSA-jw2p-m8jh-c458 · GitHub CVSS 4.4
  24. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  25. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.2% · 14th percentile
Show 75 more
  1. 2026-09-18 06:13 UTCEG score recompute
  2. 2026-09-18 06:13 UTCGHSA enrichmentGHSA-jw2p-m8jh-c458 · GitHub CVSS 4.4
  3. 2026-09-16 05:14 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  4. 2026-09-13 16:46 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  5. 2026-09-13 13:01 UTCEG score recompute
  6. 2026-09-13 13:01 UTCGHSA enrichmentGHSA-jw2p-m8jh-c458 · GitHub CVSS 4.4
  7. 2026-09-12 15:00 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  8. 2026-09-12 14:14 UTCEG score recompute
  9. 2026-09-12 14:14 UTCGHSA enrichmentGHSA-jw2p-m8jh-c458 · GitHub CVSS 4.4
  10. 2026-09-11 14:52 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  11. 2026-09-11 09:36 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  12. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  13. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  14. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  15. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  16. 2026-09-05 23:50 UTCEG score recompute
  17. 2026-09-05 23:50 UTCGHSA enrichmentGHSA-jw2p-m8jh-c458 · GitHub CVSS 4.4
  18. 2026-09-02 14:11 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  19. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  20. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  21. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  22. 2026-08-30 11:21 UTCEG score recompute
  23. 2026-08-30 11:21 UTCGHSA enrichmentGHSA-jw2p-m8jh-c458 · GitHub CVSS 4.4
  24. 2026-08-30 01:21 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  25. 2026-08-28 21:40 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  26. 2026-08-28 00:39 UTCGHSA enrichmentGHSA-jw2p-m8jh-c458 · GitHub CVSS 4.4
  27. 2026-08-27 23:29 UTCGHSA enrichmentGHSA-jw2p-m8jh-c458 · GitHub CVSS 4.4
  28. 2026-08-27 22:13 UTCEG score recompute
  29. 2026-08-27 22:13 UTCGHSA enrichmentGHSA-jw2p-m8jh-c458 · GitHub CVSS 4.4
  30. 2026-08-27 14:24 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  31. 2026-08-25 13:48 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  32. 2026-08-25 03:20 UTCEG score recompute
  33. 2026-08-25 03:20 UTCGHSA enrichmentGHSA-jw2p-m8jh-c458 · GitHub CVSS 4.4
  34. 2026-08-24 04:33 UTCGHSA enrichmentGHSA-jw2p-m8jh-c458 · GitHub CVSS 4.4
  35. 2026-08-23 05:46 UTCEG score recompute
  36. 2026-08-23 05:46 UTCGHSA enrichmentGHSA-jw2p-m8jh-c458 · GitHub CVSS 4.4
  37. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  38. 2026-08-22 06:58 UTCEG score recompute
  39. 2026-08-22 06:58 UTCGHSA enrichmentGHSA-jw2p-m8jh-c458 · GitHub CVSS 4.4
  40. 2026-08-21 23:48 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  41. 2026-08-21 08:10 UTCEG score recompute
  42. 2026-08-21 08:10 UTCGHSA enrichmentGHSA-jw2p-m8jh-c458 · GitHub CVSS 4.4
  43. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  44. 2026-08-20 09:22 UTCEG score recompute
  45. 2026-08-20 09:22 UTCGHSA enrichmentGHSA-jw2p-m8jh-c458 · GitHub CVSS 4.4
  46. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  47. 2026-08-19 10:35 UTCEG score recompute
  48. 2026-08-19 10:35 UTCGHSA enrichmentGHSA-jw2p-m8jh-c458 · GitHub CVSS 4.4
  49. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  50. 2026-08-18 11:46 UTCEG score recompute
  51. 2026-08-18 11:46 UTCGHSA enrichmentGHSA-jw2p-m8jh-c458 · GitHub CVSS 4.4
  52. 2026-08-17 12:26 UTCEG score recompute
  53. 2026-08-17 12:26 UTCGHSA enrichmentGHSA-jw2p-m8jh-c458 · GitHub CVSS 4.4
  54. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  55. 2026-08-16 13:35 UTCEG score recompute
  56. 2026-08-16 13:35 UTCGHSA enrichmentGHSA-jw2p-m8jh-c458 · GitHub CVSS 4.4
  57. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  58. 2026-08-15 14:48 UTCEG score recompute
  59. 2026-08-15 14:48 UTCGHSA enrichmentGHSA-jw2p-m8jh-c458 · GitHub CVSS 4.4
  60. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  61. 2026-08-14 16:01 UTCEG score recompute
  62. 2026-08-14 16:01 UTCGHSA enrichmentGHSA-jw2p-m8jh-c458 · GitHub CVSS 4.4
  63. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  64. 2026-08-13 17:13 UTCGHSA enrichmentGHSA-jw2p-m8jh-c458 · GitHub CVSS 4.4
  65. 2026-08-12 18:07 UTCEG score recompute
  66. 2026-08-12 18:06 UTCGHSA enrichmentGHSA-jw2p-m8jh-c458 · GitHub CVSS 4.4
  67. 2026-08-12 13:50 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  68. 2026-08-11 19:19 UTCEG score recompute
  69. 2026-08-11 19:19 UTCGHSA enrichmentGHSA-jw2p-m8jh-c458 · GitHub CVSS 4.4
  70. 2026-08-11 13:42 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  71. 2026-08-10 23:59 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  72. 2026-08-10 20:31 UTCGHSA enrichmentGHSA-jw2p-m8jh-c458 · GitHub CVSS 4.4
  73. 2026-08-10 19:20 UTCGHSA enrichmentGHSA-jw2p-m8jh-c458 · GitHub CVSS 4.4
  74. 2026-08-10 00:57 UTCEG score recompute
  75. 2026-08-10 00:57 UTCGHSA enrichmentGHSA-jw2p-m8jh-c458 · GitHub CVSS 4.4

Frequently asked(5)

What is CVE-2026-13728?
CVE-2026-13728 is a medium-severity vulnerability; its CVE record was published on July 3, 2026. In exception circumstances, WatchGuard Fireware OS on a FireCluster may use a hard-coded encryption key to encrypt saved credentials for Access Portal resources. This vulnerability does not affect devices that do not support the Access Portal feature or standalone Fireboxes not deployed in a…
When was CVE-2026-13728 made public?
CVE-2026-13728 was made public on July 2, 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 July 3, 2026. 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-2026-13728 actively exploited?
CVE-2026-13728 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (12th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-13728?
CVE-2026-13728 has a CVSS v3 base score of 4.4 (NVD).
How do I remediate CVE-2026-13728?
The CVE record's solution for CVE-2026-13728, written by its CNA WatchGuard Technologies, Inc., names the fix: "Fireware OS 2026.2.1, Fireware OS 12.12.1, Fireware OS 12.11.9". The vendor advisories EchelonGraph has for CVE-2026-13728 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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