CVE-2026-31178

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-04-23. 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: 1%CVSS: 9.8Exploit: NoneExposed: 0

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

An issue was discovered in ToToLink A3300R firmware v17.0.0cu.557_B20221024 allowing attackers to execute arbitrary commands via the stunMaxAlive parameter to /cgi-bin/cstecgi.cgi.

CVSS v3
9.8
EG Score
9.8(medium)
EPSS
43.7%
KEV
Not listed

Published

April 23, 2026

Last Modified

April 27, 2026

Advisory Details (1)

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

TOTOLINK-Vul/totolink-a3300r-stun-max-alive-cmd-injection at main · Svigo-o/TOTOLINK-Vul · GitHub

https://github.com/Svigo-o/TOTOLINK-Vul/tree/main/totolink-a3300r-stun-max-alive-cmd-injection

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 43× 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 229 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-31178?
CVE-2026-31178 is a critical vulnerability published on April 23, 2026. An issue was discovered in ToToLink A3300R firmware v17.0.0cu.557_B20221024 allowing attackers to execute arbitrary commands via the stunMaxAlive parameter to /cgi-bin/cstecgi.cgi.
When was CVE-2026-31178 disclosed?
CVE-2026-31178 was first published in the National Vulnerability Database on April 23, 2026, with the most recent update on April 27, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-31178 actively exploited?
CVE-2026-31178 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 43.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-31178?
CVE-2026-31178 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-31178?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-31178, 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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