CVE-2026-9436

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: HIGH) published 2026-05-26. the CNA's CVSS baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:vuldb, epss, ghsa
Elevated
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 2%CVSS: 9.8Exploit: NoneExposed: 0

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

A flaw has been found in Totolink A8000RU 7.1cu.643_b20200521. The impacted element is the function setL2tpServerCfg of the file /cgi-bin/cstecgi.cgi of the component Web Management Interface. Executing a manipulation of the argument enable can lead to os command injection. The attack can be executed remotely. The exploit has been published and may be used.

CVSS v3
9.8
EG Score
9.8(medium)
EPSS
78.6%
KEV
Not listed

Published

May 25, 2026

Last Modified

May 28, 2026

Advisory Details (2)

Auto-updated Jun 20, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic

TOTOLINK

https://www.totolink.net/
generic🟡 PoC Available

vuldb_new2/A8000RU/vul_357/README.md at main · Litengzheng/vuldb_new2 · GitHub

https://github.com/Litengzheng/vuldb_new2/blob/main/A8000RU/vul_357/README.md

Vendor Advisories for CVE-2026-9436(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 7× in last 7d / 74× 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 278 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-9436?
CVE-2026-9436 is a critical vulnerability published on May 25, 2026. A flaw has been found in Totolink A8000RU 7.1cu.643_b20200521. The impacted element is the function setL2tpServerCfg of the file /cgi-bin/cstecgi.cgi of the component Web Management Interface. Executing a manipulation of the argument enable can lead to os command injection. The attack can be…
When was CVE-2026-9436 disclosed?
CVE-2026-9436 was first published in the National Vulnerability Database on May 25, 2026, with the most recent update on May 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-9436 actively exploited?
CVE-2026-9436 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 78.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-9436?
CVE-2026-9436 has a CVSS v4.0 base score of 9.8 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-9436?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-9436, 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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