CVE-2026-13371

MEDIUMNVD 4.94.9
EchelonGraph scoreMEDIUM confidence

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

Score 4.9 from GitHub Security Advisory published 2026-07-03. NVD baseline CVSS 4.9; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
4.9EG
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: 0.6%CVSS: 4.9Exploit: None knownExposed services: Not assessed

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

An authenticated administrator can trigger a denial-of-service condition in the Fireware Management Web UI by sending malformed or crafted data to the put_data endpoint, which performs unsafe deserialization of the attacker-supplied input.

CVSS v3
4.9
EG Score
4.9MEDIUMmedium confidence
EG Risk
22
EG Risk 22/100

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)
Severity49% × 45%
The EG Score, 4.9 of 10.
Exploitation0.6% × 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: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
0.6%
EPSS %ILE
46th
KEV
Not listed

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

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.

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 7, 2026
No fix on record yet.
Web page

WatchGuard Firebox Management Web UI Denial of Service via Unsafe Deserialization | WatchGuard Technologies

https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-00014

Vendor Advisories for CVE-2026-13371(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 10× 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 176 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 76 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-11 20:11 UTCEG score recompute
  2. 2026-10-11 18:23 UTCEG score recompute
  3. 2026-10-11 14:57 UTCEG score recompute
  4. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  5. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  6. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  7. 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  8. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  9. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  10. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  11. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  12. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  13. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  14. 2026-09-30 15:02 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  15. 2026-09-29 15:20 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  16. 2026-09-28 13:50 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  17. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  18. 2026-09-23 13:47 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  19. 2026-09-23 06:37 UTCEG score recompute
  20. 2026-09-23 06:37 UTCGHSA enrichmentGHSA-hprc-6hj7-jj8j · GitHub CVSS 4.9
  21. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  22. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  23. 2026-09-18 06:13 UTCEG score recompute
  24. 2026-09-18 06:13 UTCGHSA enrichmentGHSA-hprc-6hj7-jj8j · GitHub CVSS 4.9
  25. 2026-09-16 05:14 UTCEPSS rescoreEPSS 0.4% · 28th percentile
Show 75 more
  1. 2026-09-13 16:56 UTCEG score recompute
  2. 2026-09-13 16:56 UTCGHSA enrichmentGHSA-hprc-6hj7-jj8j · GitHub CVSS 4.9
  3. 2026-09-13 16:46 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  4. 2026-09-12 15:00 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  5. 2026-09-12 14:13 UTCEG score recompute
  6. 2026-09-12 14:13 UTCGHSA enrichmentGHSA-hprc-6hj7-jj8j · GitHub CVSS 4.9
  7. 2026-09-11 14:52 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  8. 2026-09-11 09:36 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  9. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  10. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  11. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  12. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  13. 2026-09-05 23:50 UTCEG score recompute
  14. 2026-09-05 23:50 UTCGHSA enrichmentGHSA-hprc-6hj7-jj8j · GitHub CVSS 4.9
  15. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  16. 2026-09-02 14:11 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  17. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  18. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  19. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  20. 2026-08-30 11:21 UTCEG score recompute
  21. 2026-08-30 11:21 UTCGHSA enrichmentGHSA-hprc-6hj7-jj8j · GitHub CVSS 4.9
  22. 2026-08-30 01:21 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  23. 2026-08-28 21:40 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  24. 2026-08-28 00:39 UTCGHSA enrichmentGHSA-hprc-6hj7-jj8j · GitHub CVSS 4.9
  25. 2026-08-27 23:29 UTCGHSA enrichmentGHSA-hprc-6hj7-jj8j · GitHub CVSS 4.9
  26. 2026-08-27 22:13 UTCEG score recompute
  27. 2026-08-27 22:13 UTCGHSA enrichmentGHSA-hprc-6hj7-jj8j · GitHub CVSS 4.9
  28. 2026-08-27 14:24 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  29. 2026-08-25 16:03 UTCEG score recompute
  30. 2026-08-25 16:03 UTCGHSA enrichmentGHSA-hprc-6hj7-jj8j · GitHub CVSS 4.9
  31. 2026-08-25 13:48 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  32. 2026-08-24 13:35 UTCEG score recompute
  33. 2026-08-24 13:35 UTCGHSA enrichmentGHSA-hprc-6hj7-jj8j · GitHub CVSS 4.9
  34. 2026-08-23 11:11 UTCEG score recompute
  35. 2026-08-23 11:11 UTCGHSA enrichmentGHSA-hprc-6hj7-jj8j · GitHub CVSS 4.9
  36. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  37. 2026-08-22 08:47 UTCEG score recompute
  38. 2026-08-22 08:47 UTCGHSA enrichmentGHSA-hprc-6hj7-jj8j · GitHub CVSS 4.9
  39. 2026-08-21 23:48 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  40. 2026-08-21 06:23 UTCEG score recompute
  41. 2026-08-21 06:23 UTCGHSA enrichmentGHSA-hprc-6hj7-jj8j · GitHub CVSS 4.9
  42. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  43. 2026-08-20 03:59 UTCEG score recompute
  44. 2026-08-20 03:59 UTCGHSA enrichmentGHSA-hprc-6hj7-jj8j · GitHub CVSS 4.9
  45. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  46. 2026-08-19 01:13 UTCEG score recompute
  47. 2026-08-19 01:13 UTCGHSA enrichmentGHSA-hprc-6hj7-jj8j · GitHub CVSS 4.9
  48. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  49. 2026-08-17 22:49 UTCEG score recompute
  50. 2026-08-17 22:49 UTCGHSA enrichmentGHSA-hprc-6hj7-jj8j · GitHub CVSS 4.9
  51. 2026-08-16 18:04 UTCEG score recompute
  52. 2026-08-16 18:04 UTCGHSA enrichmentGHSA-hprc-6hj7-jj8j · GitHub CVSS 4.9
  53. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  54. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  55. 2026-08-15 15:30 UTCEG score recompute
  56. 2026-08-15 15:30 UTCGHSA enrichmentGHSA-hprc-6hj7-jj8j · GitHub CVSS 4.9
  57. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  58. 2026-08-14 13:06 UTCEG score recompute▼ 2.00
  59. 2026-08-14 13:06 UTCGHSA enrichmentGHSA-hprc-6hj7-jj8j
  60. 2026-08-14 13:05 UTCNVD updateCVSS v3 → 4.9
  61. 2026-08-14 00:35 UTCEG score recompute
  62. 2026-08-14 00:35 UTCGHSA enrichmentGHSA-hprc-6hj7-jj8j
  63. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  64. 2026-08-12 22:11 UTCEG score recompute
  65. 2026-08-12 22:11 UTCGHSA enrichmentGHSA-hprc-6hj7-jj8j
  66. 2026-08-12 13:50 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  67. 2026-08-11 19:47 UTCEG score recompute
  68. 2026-08-11 19:47 UTCGHSA enrichmentGHSA-hprc-6hj7-jj8j
  69. 2026-08-11 13:42 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  70. 2026-08-10 23:59 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  71. 2026-08-10 17:23 UTCEG score recompute
  72. 2026-08-10 17:23 UTCGHSA enrichmentGHSA-hprc-6hj7-jj8j
  73. 2026-08-10 17:10 UTCEG score recompute
  74. 2026-08-10 17:10 UTCGHSA enrichmentGHSA-hprc-6hj7-jj8j
  75. 2026-08-10 01:45 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-13371?
CVE-2026-13371 is a medium-severity vulnerability; its CVE record was published on July 3, 2026. An authenticated administrator can trigger a denial-of-service condition in the Fireware Management Web UI by sending malformed or crafted data to the put_data endpoint, which performs unsafe deserialization of the attacker-supplied input.
When was CVE-2026-13371 made public?
CVE-2026-13371 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-2026-13371 actively exploited?
CVE-2026-13371 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.6% probability of exploitation in the next 30 days (46th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-13371?
CVE-2026-13371 has a CVSS v3 base score of 4.9 (NVD).
How do I remediate CVE-2026-13371?
No fix for CVE-2026-13371 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-13371 are linked in the Vendor Advisories panel on this page.

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