CVE-2026-6837

HIGHPre-NVD 7.27.2—
EchelonGraph scoreHIGH confidence

Score 7.2 from GitHub Security Advisory (severity: HIGH) published 2026-08-04. a secondary CVSS source baseline 7.2; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
7.2EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.2Exploit: Elevated riskExposed: 0

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

A post-authentication command injection vulnerability in the "export-cgi" CGI program in Zyxel WAX650S firmware versions through 7.10(ABRM.4)C0 could allow an authenticated attacker with administrator privileges to execute OS commands on an affected device.

CVSS v3
7.2
EG Score
7.2(high)
EG Risk
48(Track)
EG Risk 48/100SSVC: 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
Severity72% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
59%
KEV
Not listed

Published

August 4, 2026

Last Modified

August 5, 2026

Advisory Details (1)

Auto-updated Aug 4, 2026
No patch confirmed yet.
generic

Zyxel security advisory for command injection and improper authentication vulnerabilities in certain APs, FWA7, and Security Routers | Zyxel Networks

https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-command-injection-and-improper-authentication-vulnerabilities-in-certain-aps-fwa7-and-security-routers-08-04-2026

Vendor Advisories for CVE-2026-6837(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 28× in last 7d / 76× 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. 2026-08-20 22:56 UTCEPSS rescore
  2. 2026-08-20 20:32 UTCGHSA enrichment
  3. 2026-08-20 07:44 UTCGHSA enrichment
  4. 2026-08-19 18:57 UTCEG score recompute
  5. 2026-08-19 18:57 UTCGHSA enrichment
  6. 2026-08-19 17:04 UTCEPSS rescore
  7. 2026-08-19 04:36 UTCGHSA enrichment
  8. 2026-08-18 15:49 UTCEG score recompute
  9. 2026-08-18 15:48 UTCGHSA enrichment
  10. 2026-08-18 13:49 UTCEPSS rescore
  11. 2026-08-18 13:49 UTCEPSS rescore
  12. 2026-08-18 00:59 UTCEG score recompute
  13. 2026-08-18 00:59 UTCGHSA enrichment
  14. 2026-08-17 13:47 UTCEPSS rescore
  15. 2026-08-17 11:45 UTCEG score recompute
  16. 2026-08-17 11:45 UTCGHSA enrichment
  17. 2026-08-16 22:58 UTCEG score recompute
  18. 2026-08-16 22:58 UTCGHSA enrichment
  19. 2026-08-16 14:56 UTCEPSS rescore
  20. 2026-08-16 14:56 UTCEPSS rescore
  21. 2026-08-16 10:10 UTCEG score recompute
  22. 2026-08-16 10:10 UTCGHSA enrichment
  23. 2026-08-16 02:15 UTCEPSS rescore
  24. 2026-08-15 21:23 UTCGHSA enrichment
  25. 2026-08-15 08:35 UTCEG score recompute
Show 51 more
  1. 2026-08-15 08:35 UTCGHSA enrichment
  2. 2026-08-15 01:31 UTCEPSS rescore
  3. 2026-08-14 19:47 UTCGHSA enrichment
  4. 2026-08-14 07:00 UTCEG score recompute
  5. 2026-08-14 07:00 UTCGHSA enrichment
  6. 2026-08-13 22:00 UTCEPSS rescore
  7. 2026-08-13 18:12 UTCGHSA enrichment
  8. 2026-08-13 05:24 UTCGHSA enrichment
  9. 2026-08-12 16:36 UTCEG score recompute
  10. 2026-08-12 16:36 UTCGHSA enrichment
  11. 2026-08-12 13:51 UTCEPSS rescore
  12. 2026-08-12 03:46 UTCGHSA enrichment
  13. 2026-08-11 14:58 UTCEG score recompute
  14. 2026-08-11 14:58 UTCGHSA enrichment
  15. 2026-08-11 02:10 UTCEG score recompute
  16. 2026-08-11 02:10 UTCGHSA enrichment
  17. 2026-08-11 00:00 UTCEPSS rescore
  18. 2026-08-10 13:23 UTCGHSA enrichment
  19. 2026-08-10 00:34 UTCEG score recompute
  20. 2026-08-10 00:34 UTCGHSA enrichment
  21. 2026-08-09 13:47 UTCEPSS rescore
  22. 2026-08-09 11:47 UTCGHSA enrichment
  23. 2026-08-08 22:59 UTCEG score recompute
  24. 2026-08-08 22:59 UTCGHSA enrichment
  25. 2026-08-08 16:37 UTCEPSS rescore
  26. 2026-08-08 10:11 UTCGHSA enrichment
  27. 2026-08-07 21:24 UTCEG score recompute
  28. 2026-08-07 21:24 UTCGHSA enrichment
  29. 2026-08-07 08:36 UTCGHSA enrichment
  30. 2026-08-06 19:48 UTCEG score recompute
  31. 2026-08-06 19:48 UTCGHSA enrichment
  32. 2026-08-06 13:47 UTCEPSS rescore
  33. 2026-08-06 07:01 UTCEG score recompute
  34. 2026-08-06 07:01 UTCGHSA enrichment
  35. 2026-08-05 19:17 UTCEPSS rescore
  36. 2026-08-05 19:17 UTCEPSS rescore
  37. 2026-08-05 18:13 UTCGHSA enrichment
  38. 2026-08-05 05:26 UTCEG score recompute
  39. 2026-08-05 05:25 UTCGHSA enrichment
  40. 2026-08-05 04:36 UTCEG score recompute
  41. 2026-08-05 04:36 UTCGHSA enrichment
  42. 2026-08-04 19:26 UTCEG score recompute
  43. 2026-08-04 19:26 UTCGHSA enrichment
  44. 2026-08-04 18:56 UTCEG score recompute
  45. 2026-08-04 18:56 UTCGHSA enrichment
  46. 2026-08-04 15:10 UTCEPSS rescore
  47. 2026-08-04 14:53 UTCEG score recompute
  48. 2026-08-04 14:53 UTCGHSA enrichment
  49. 2026-08-04 03:26 UTCEG score recompute
  50. 2026-08-04 02:23 UTCEG score recompute
  51. 2026-08-04 02:23 UTCMITRE cvelistV5first tracked

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 GitHub PoC). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCminanagehsalalma/CVE-2026-6837-zyxel-export-cgi-command-injection
    First seen Aug 16, 2026

    Public writeup, PoC, and emulation materials for CVE-2026-6837 affecting Zyxel export-cgi PKCS#12 export handling.

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-6837?
CVE-2026-6837 is a high vulnerability published on August 4, 2026. A post-authentication command injection vulnerability in the "export-cgi" CGI program in Zyxel WAX650S firmware versions through 7.10(ABRM.4)C0 could allow an authenticated attacker with administrator privileges to execute OS commands on an affected device.
When was CVE-2026-6837 disclosed?
CVE-2026-6837 was first published in the National Vulnerability Database on August 4, 2026, with the most recent update on August 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-6837 actively exploited?
CVE-2026-6837 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 41.5% of all scored CVEs.
What is the CVSS score of CVE-2026-6837?
CVE-2026-6837 has a CVSS v3 base score of 7.2 (NVD).
How do I remediate CVE-2026-6837?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-6837, 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-2026-6837

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