CVE-2026-57909

CRITICALPre-NVD 9.49.4—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.4 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 79% 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 — 4 sources updated this week
9.4EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.4Exploit: None knownExposed: 0

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

A path traversal vulnerability in WatchGuard Agent allows a remote, unauthenticated attacker on an adjacent network to execute arbitrary code on an affected system.

CVSS v3
9.4
EG Score
9.4(medium)
EG Risk
42(Track)
EG Risk 42/100SSVC: 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
Severity94% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
21%
KEV
Not listed

Published

August 25, 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-2026-57909 — WatchGuard Agent path traversal allows unauthenticated remote code execution

https://psirt.watchguard.com/CVE-2026-57909

Vendor Advisories for CVE-2026-57909(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 48× in last 7d / 48× 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. 2026-08-30 05:43 UTCGHSA enrichment
  2. 2026-08-30 02:03 UTCEG score recompute
  3. 2026-08-30 02:03 UTCGHSA enrichment
  4. 2026-08-30 01:22 UTCEPSS rescore
  5. 2026-08-29 22:24 UTCGHSA enrichment
  6. 2026-08-29 18:45 UTCGHSA enrichment
  7. 2026-08-29 15:01 UTCGHSA enrichment
  8. 2026-08-29 11:22 UTCGHSA enrichment
  9. 2026-08-29 07:38 UTCGHSA enrichment
  10. 2026-08-29 03:57 UTCGHSA enrichment
  11. 2026-08-29 00:17 UTCEG score recompute
  12. 2026-08-29 00:17 UTCGHSA enrichment
  13. 2026-08-28 21:42 UTCEPSS rescore
  14. 2026-08-28 19:08 UTCEG score recompute
  15. 2026-08-28 19:08 UTCGHSA enrichment
  16. 2026-08-28 17:29 UTCGHSA enrichment
  17. 2026-08-28 13:43 UTCGHSA enrichment
  18. 2026-08-28 10:04 UTCGHSA enrichment
  19. 2026-08-28 06:24 UTCGHSA enrichment
  20. 2026-08-28 02:44 UTCGHSA enrichment
  21. 2026-08-27 23:05 UTCGHSA enrichment
  22. 2026-08-27 19:26 UTCGHSA enrichment
  23. 2026-08-27 15:47 UTCEG score recompute
  24. 2026-08-27 15:47 UTCGHSA enrichment
  25. 2026-08-27 14:25 UTCEPSS rescore
Show 23 more
  1. 2026-08-27 12:04 UTCGHSA enrichment
  2. 2026-08-27 08:25 UTCGHSA enrichment
  3. 2026-08-27 04:44 UTCGHSA enrichment
  4. 2026-08-27 01:04 UTCGHSA enrichment
  5. 2026-08-26 21:25 UTCGHSA enrichment
  6. 2026-08-26 17:46 UTCEG score recompute
  7. 2026-08-26 17:46 UTCGHSA enrichment
  8. 2026-08-26 14:46 UTCEPSS rescore
  9. 2026-08-26 13:25 UTCEG score recompute
  10. 2026-08-26 13:25 UTCGHSA enrichment
  11. 2026-08-26 11:25 UTCGHSA enrichment
  12. 2026-08-26 07:44 UTCGHSA enrichment
  13. 2026-08-26 04:04 UTCGHSA enrichment
  14. 2026-08-26 00:23 UTCGHSA enrichment
  15. 2026-08-25 20:41 UTCGHSA enrichment
  16. 2026-08-25 17:03 UTCGHSA enrichment
  17. 2026-08-25 13:22 UTCEG score recompute
  18. 2026-08-25 13:22 UTCGHSA enrichment
  19. 2026-08-25 13:16 UTCEG score recompute
  20. 2026-08-25 13:16 UTCGHSA enrichment
  21. 2026-08-25 12:17 UTCEG score recompute
  22. 2026-08-25 11:52 UTCEG score recompute
  23. 2026-08-25 11:51 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-57909?
CVE-2026-57909 is a critical vulnerability published on August 25, 2026. A path traversal vulnerability in WatchGuard Agent allows a remote, unauthenticated attacker on an adjacent network to execute arbitrary code on an affected system.
When was CVE-2026-57909 disclosed?
CVE-2026-57909 was first published in the National Vulnerability Database on August 25, 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-2026-57909 actively exploited?
CVE-2026-57909 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 79.0% of all scored CVEs.
What is the CVSS score of CVE-2026-57909?
CVE-2026-57909 has a CVSS v3 base score of 9.4 (NVD).
How do I remediate CVE-2026-57909?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-57909, 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-2026-57909

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