CVE-2026-5994

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: HIGH) published 2026-04-10. 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 security flaw has been discovered in Totolink A7100RU 7.4cu.2313_b20191024. This issue affects the function setTelnetCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Performing a manipulation of the argument telnet_enabled results in os command injection. The attack is possible to be carried out remotely. The exploit has been released to the public and may be used for attacks.

CVSS v3
9.8
EG Score
9.8(medium)
EPSS
76.1%
KEV
Not listed

Published

April 10, 2026

Last Modified

April 27, 2026

Advisory Details (2)

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

TOTOLINK

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

vuldb_new/A7100RU/vul_166/README.md at main · Litengzheng/vuldb_new · GitHub

https://github.com/Litengzheng/vuldb_new/blob/main/A7100RU/vul_166/README.md

Weakness Classification(2)

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 135 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
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  15. 2026-07-06 16:27 UTCEPSS rescore
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  24. 2026-06-30 23:22 UTCEPSS rescore
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  1. 2026-06-28 14:07 UTCEPSS rescore
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  3. 2026-06-27 03:08 UTCEPSS rescore
  4. 2026-06-25 13:50 UTCEPSS rescore
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  6. 2026-06-23 21:33 UTCEPSS rescore
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  8. 2026-06-22 14:25 UTCEPSS rescore
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  10. 2026-06-21 14:56 UTCEPSS rescore
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  20. 2026-06-15 17:49 UTCEPSS rescore
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  22. 2026-06-15 04:44 UTCEG score recompute
  23. 2026-06-15 04:44 UTCGHSA enrichment
  24. 2026-06-14 23:18 UTCEPSS rescore
  25. 2026-06-13 23:00 UTCEPSS rescore
  26. 2026-06-12 23:12 UTCEPSS rescore
  27. 2026-06-12 23:12 UTCEPSS rescore
  28. 2026-06-12 04:59 UTCEG score recompute
  29. 2026-06-12 04:59 UTCGHSA enrichment
  30. 2026-06-12 00:38 UTCEG score recompute
  31. 2026-06-12 00:38 UTCGHSA enrichment
  32. 2026-06-11 20:18 UTCEG score recompute
  33. 2026-06-11 20:18 UTCGHSA enrichment
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  35. 2026-06-10 22:44 UTCEG score recompute
  36. 2026-06-10 22:44 UTCGHSA enrichment
  37. 2026-06-10 22:19 UTCEPSS rescore
  38. 2026-06-10 18:21 UTCEG score recompute
  39. 2026-06-10 18:21 UTCGHSA enrichment
  40. 2026-06-10 14:02 UTCEG score recompute
  41. 2026-06-10 14:01 UTCGHSA enrichment
  42. 2026-06-10 13:22 UTCEPSS rescore
  43. 2026-06-10 09:41 UTCEG score recompute
  44. 2026-06-10 09:41 UTCGHSA enrichment
  45. 2026-06-10 05:21 UTCEG score recompute
  46. 2026-06-10 05:21 UTCGHSA enrichment
  47. 2026-06-10 00:58 UTCEG score recompute
  48. 2026-06-10 00:58 UTCGHSA enrichment
  49. 2026-06-09 17:10 UTCEG score recompute
  50. 2026-06-09 17:09 UTCGHSA enrichment
  51. 2026-06-09 12:49 UTCEG score recompute
  52. 2026-06-09 12:49 UTCGHSA enrichment
  53. 2026-06-08 14:46 UTCEG score recompute
  54. 2026-06-08 14:45 UTCGHSA enrichment
  55. 2026-06-08 14:17 UTCEPSS rescore
  56. 2026-06-08 10:26 UTCEG score recompute
  57. 2026-06-08 10:26 UTCGHSA enrichment
  58. 2026-06-08 06:05 UTCEG score recompute
  59. 2026-06-08 06:05 UTCGHSA enrichment
  60. 2026-06-08 01:43 UTCEG score recompute
  61. 2026-06-08 01:43 UTCGHSA enrichment
  62. 2026-06-07 21:23 UTCEG score recompute
  63. 2026-06-07 21:23 UTCGHSA enrichment
  64. 2026-06-07 17:02 UTCEG score recompute
  65. 2026-06-07 17:02 UTCGHSA enrichment
  66. 2026-06-07 15:25 UTCEPSS rescore
  67. 2026-06-07 12:42 UTCEG score recompute
  68. 2026-06-07 12:42 UTCGHSA enrichment
  69. 2026-06-07 08:22 UTCEG score recompute
  70. 2026-06-07 08:22 UTCGHSA enrichment
  71. 2026-06-06 13:47 UTCEPSS rescore
  72. 2026-06-05 22:47 UTCEPSS rescore
  73. 2026-06-05 06:10 UTCEPSS rescore
  74. 2026-06-04 13:12 UTCEPSS rescore
  75. 2026-06-04 13:12 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2026-5994?
CVE-2026-5994 is a critical vulnerability published on April 10, 2026. A security flaw has been discovered in Totolink A7100RU 7.4cu.2313b20191024. This issue affects the function setTelnetCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Performing a manipulation of the argument telnetenabled results in os command injection. The attack is possible to…
When was CVE-2026-5994 disclosed?
CVE-2026-5994 was first published in the National Vulnerability Database on April 10, 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-2026-5994 actively exploited?
CVE-2026-5994 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 76.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-5994?
CVE-2026-5994 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-5994?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-5994, 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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