CVE-2026-7156

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: HIGH) published 2026-04-27. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
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 vulnerability was detected in Totolink A8000RU 7.1cu.643_b20200521. Affected is the function CsteSystem of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. The manipulation of the argument HTTP results in os command injection. The attack may be launched remotely. The exploit is now public and may be used.

CVSS v3
9.8
EG Score
9.8(medium)
EPSS
75.8%
KEV
Not listed

Published

April 27, 2026

Last Modified

April 28, 2026

Advisory Details (4)

Auto-updated May 10, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic

TOTOLINK

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

vuldb_new2/A8000RU/vul_320/README.md at main · Litengzheng/vuldb_new2 · GitHub

https://github.com/Litengzheng/vuldb_new2/blob/main/A8000RU/vul_320/README.md
generic🟡 PoC Available

CVE-2026-7156 Totolink A8000RU CGI cstecgi.cgi CsteSystem os command injection

https://vuldb.com/vuln/359755
generic

Submit #801142: Totolink A8000RU 7.1cu.643_b20200521 Command Injection

https://vuldb.com/submit/801142

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 8× in last 7d / 42× 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 212 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. 2026-07-11 08:27 UTCEPSS rescore
  9. 2026-07-09 19:10 UTCEPSS rescore
  10. 2026-07-09 19:10 UTCEPSS rescore
  11. 2026-07-08 15:16 UTCEPSS rescore
  12. 2026-07-08 15:16 UTCEPSS rescore
  13. 2026-07-07 13:46 UTCEPSS rescore
  14. 2026-07-07 13:46 UTCEPSS rescore
  15. 2026-07-06 16:27 UTCEPSS rescore
  16. 2026-07-06 16:27 UTCEPSS rescore
  17. 2026-07-06 02:23 UTCEPSS rescore
  18. 2026-07-06 02:23 UTCEPSS rescore
  19. 2026-07-05 02:31 UTCEPSS rescore
  20. 2026-07-05 02:30 UTCEPSS rescore
  21. 2026-07-04 06:31 UTCEPSS rescore
  22. 2026-07-04 06:31 UTCEPSS rescore
  23. 2026-07-01 15:07 UTCEPSS rescore
  24. 2026-06-30 23:22 UTCEPSS rescore
  25. 2026-06-29 14:06 UTCEPSS rescore
Show 75 more
  1. 2026-06-28 14:07 UTCEPSS rescore
  2. 2026-06-28 04:56 UTCEPSS rescore
  3. 2026-06-27 03:08 UTCEPSS rescore
  4. 2026-06-25 13:50 UTCEPSS rescore
  5. 2026-06-24 14:05 UTCEPSS rescore
  6. 2026-06-23 21:33 UTCEPSS rescore
  7. 2026-06-22 14:25 UTCEPSS rescore
  8. 2026-06-22 14:25 UTCEPSS rescore
  9. 2026-06-21 14:56 UTCEPSS rescore
  10. 2026-06-21 14:56 UTCEPSS rescore
  11. 2026-06-21 01:59 UTCEPSS rescore
  12. 2026-06-21 01:59 UTCEPSS rescore
  13. 2026-06-19 19:26 UTCEPSS rescore
  14. 2026-06-19 19:26 UTCEPSS rescore
  15. 2026-06-18 17:52 UTCEPSS rescore
  16. 2026-06-18 17:52 UTCEPSS rescore
  17. 2026-06-17 17:53 UTCEPSS rescore
  18. 2026-06-16 17:53 UTCEPSS rescore
  19. 2026-06-15 17:49 UTCEPSS rescore
  20. 2026-06-15 17:49 UTCEPSS rescore
  21. 2026-06-15 05:48 UTCEG score recompute
  22. 2026-06-15 05:48 UTCGHSA enrichment
  23. 2026-06-15 01:33 UTCEG score recompute
  24. 2026-06-15 01:33 UTCGHSA enrichment
  25. 2026-06-14 23:18 UTCEPSS rescore
  26. 2026-06-14 20:47 UTCEG score recompute
  27. 2026-06-14 20:47 UTCGHSA enrichment
  28. 2026-06-14 16:32 UTCEG score recompute
  29. 2026-06-14 16:32 UTCGHSA enrichment
  30. 2026-06-14 10:53 UTCEG score recompute
  31. 2026-06-14 10:53 UTCGHSA enrichment
  32. 2026-06-13 23:00 UTCEPSS rescore
  33. 2026-06-12 23:12 UTCEPSS rescore
  34. 2026-06-12 23:12 UTCEPSS rescore
  35. 2026-06-12 10:38 UTCEG score recompute
  36. 2026-06-12 10:38 UTCGHSA enrichment
  37. 2026-06-12 06:18 UTCEG score recompute
  38. 2026-06-12 06:18 UTCGHSA enrichment
  39. 2026-06-12 02:02 UTCEG score recompute
  40. 2026-06-12 02:02 UTCGHSA enrichment
  41. 2026-06-11 21:45 UTCEG score recompute
  42. 2026-06-11 21:45 UTCGHSA enrichment
  43. 2026-06-11 17:29 UTCEG score recompute
  44. 2026-06-11 17:29 UTCGHSA enrichment
  45. 2026-06-11 14:00 UTCEPSS rescore
  46. 2026-06-11 11:40 UTCEG score recompute
  47. 2026-06-11 11:40 UTCGHSA enrichment
  48. 2026-06-11 06:05 UTCEG score recompute
  49. 2026-06-11 06:05 UTCGHSA enrichment
  50. 2026-06-10 22:19 UTCEPSS rescore
  51. 2026-06-10 20:59 UTCEG score recompute
  52. 2026-06-10 20:59 UTCGHSA enrichment
  53. 2026-06-10 16:40 UTCEG score recompute
  54. 2026-06-10 16:40 UTCGHSA enrichment
  55. 2026-06-10 13:22 UTCEPSS rescore
  56. 2026-06-10 12:25 UTCEG score recompute
  57. 2026-06-10 12:25 UTCGHSA enrichment
  58. 2026-06-10 08:09 UTCEG score recompute
  59. 2026-06-10 08:09 UTCGHSA enrichment
  60. 2026-06-10 03:54 UTCEG score recompute
  61. 2026-06-10 03:54 UTCGHSA enrichment
  62. 2026-06-09 23:38 UTCEG score recompute
  63. 2026-06-09 23:38 UTCGHSA enrichment
  64. 2026-06-09 18:13 UTCEG score recompute
  65. 2026-06-09 18:13 UTCGHSA enrichment
  66. 2026-06-09 13:57 UTCEG score recompute
  67. 2026-06-09 13:57 UTCGHSA enrichment
  68. 2026-06-09 09:42 UTCEG score recompute
  69. 2026-06-09 09:42 UTCGHSA enrichment
  70. 2026-06-09 04:23 UTCEG score recompute
  71. 2026-06-09 04:23 UTCGHSA enrichment
  72. 2026-06-09 00:07 UTCEG score recompute
  73. 2026-06-09 00:07 UTCGHSA enrichment
  74. 2026-06-08 14:17 UTCEPSS rescore
  75. 2026-06-08 12:47 UTCEG score recompute

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Frequently asked(5)

What is CVE-2026-7156?
CVE-2026-7156 is a critical vulnerability published on April 27, 2026. A vulnerability was detected in Totolink A8000RU 7.1cu.643_b20200521. Affected is the function CsteSystem of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. The manipulation of the argument HTTP results in os command injection. The attack may be launched remotely. The exploit is now…
When was CVE-2026-7156 disclosed?
CVE-2026-7156 was first published in the National Vulnerability Database on April 27, 2026, with the most recent update on April 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-7156 actively exploited?
CVE-2026-7156 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 75.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-7156?
CVE-2026-7156 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-7156?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-7156, 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.

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