CVE-2026-36608

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-06-03. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
8.8EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 8.8Exploit: None knownExposed services: Not assessed

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

Mercusys AC12G (EU) V1 router with firmware AC12G(EU)_V1_200909 allows UPnP AddPortMapping to forward external ports to the router's own admin interface by accepting its own IP (192.168.1.1) or localhost (127.0.0.1) as InternalClient. An unauthenticated LAN attacker can expose the admin panel to the internet with a single SOAP request.

CVSS v3
8.8
EG Score
8.8HIGHmedium confidence
EG Risk
40
EG Risk 40/100

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
Severity88% × 45%
Exploitation0% × 40%
Automatability0% × 15%
EPSS PROB
0.3%
EPSS %ILE
20th
KEV
Not listed

Published

June 3, 2026

Last Modified

July 22, 2026

Advisory Details (1)

Auto-updated Jun 3, 2026
No fix on record yet.
generic

MERCUSYS-AC12G/advisories/CVE-2026-36608.md at master · Tymbark7372/MERCUSYS-AC12G · GitHub

https://github.com/Tymbark7372/MERCUSYS-AC12G/blob/master/advisories/CVE-2026-36608.md

Vendor Advisories for CVE-2026-36608(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 7× in last 7d / 26× 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.

Showing the most recent 100 of 258 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-36608?
CVE-2026-36608 is a high vulnerability published on June 3, 2026. Mercusys AC12G (EU) V1 router with firmware AC12G(EU)V1200909 allows UPnP AddPortMapping to forward external ports to the router's own admin interface by accepting its own IP (192.168.1.1) or localhost (127.0.0.1) as InternalClient. An unauthenticated LAN attacker can expose the admin panel to the…
When was CVE-2026-36608 disclosed?
CVE-2026-36608 was first published on June 3, 2026, with the most recent update on July 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-36608 actively exploited?
CVE-2026-36608 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (20th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-36608?
CVE-2026-36608 has a CVSS v3.1 base score of 8.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-36608?
No fix for CVE-2026-36608 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-2026-36608 are linked in the Vendor Advisories panel on this page.

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