CVE-2026-13728

MEDIUMPre-NVD 5.95.9—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.9 under the CNA's CVSS (NVD's own analysis pending). EPSS exploit probability: 0.2%, top 94% 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: cna:watchguard, epss
Trending — 4 sources updated this week
5.9
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.9Exploit: NoneExposed: 0

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

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 affects Fireware OS 12.1 up to and including 12.12 and 2025.1 up to and including 2026.2. This vulnerability does not affect devices that do not support the Access Portal feature or standalone Fireboxes not deployed in a FireCluster.

CVSS v3
5.9
EG Score
5.9(medium)
EPSS
5.7%
KEV
Not listed

Published

July 3, 2026

Last Modified

July 6, 2026

Advisory Details (1)

Auto-updated Jul 6, 2026
No patch confirmed yet.
generic

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 / 11× 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. 2026-07-06 16:27 UTCEPSS rescore
  2. 2026-07-06 15:37 UTCEG score recompute▲ 5.90
  3. 2026-07-06 15:37 UTCGHSA enrichment
  4. 2026-07-06 15:36 UTCMITRE cvelistV5CVSS v3 → 5.9 · CVSS v4 → 5.9
  5. 2026-07-06 02:23 UTCEPSS rescore
  6. 2026-07-05 23:08 UTCEG score recompute
  7. 2026-07-05 23:08 UTCGHSA enrichment
  8. 2026-07-05 02:30 UTCEPSS rescore
  9. 2026-07-05 02:30 UTCEPSS rescore
  10. 2026-07-03 01:06 UTCEG score recompute
  11. 2026-07-03 01:06 UTCGHSA enrichment

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-13728?
CVE-2026-13728 is a medium vulnerability 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 affects Fireware OS 12.1 up to and including 12.12 and 2025.1 up to and including 2026.2. This vulnerability does not…
When was CVE-2026-13728 disclosed?
CVE-2026-13728 was first published in the National Vulnerability Database on July 3, 2026, with the most recent update on July 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-13728 actively exploited?
CVE-2026-13728 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 5.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-13728?
CVE-2026-13728 has a CVSS v3 base score of 5.9 (NVD).
How do I remediate CVE-2026-13728?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-13728, 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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