CVE-2026-9531

MEDIUMNVD 6.36.3—
EchelonGraph scoreMEDIUM confidence

Score 6.3 from GitHub Security Advisory (severity: LOW) published 2026-05-26. NVD baseline CVSS 6.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
6.3
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 2%CVSS: 6.3Exploit: NoneExposed: 0

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

A weakness has been identified in Totolink CA750-PoE 6.2c.510. Impacted is the function setUpgradeUboot of the file /cgi-bin/cstecgi.cgi of the component Setting Handler. This manipulation of the argument FileName causes os command injection. The attack is possible to be carried out remotely. The exploit has been made available to the public and could be used for attacks.

CVSS v3
6.3
EG Score
6.3(medium)
EPSS
76.0%
KEV
Not listed

Published

May 26, 2026

Last Modified

May 28, 2026

Advisory Details (2)

Auto-updated Jun 13, 2026
No patch confirmed yet.
generic

TOTOLINK

https://www.totolink.net/
generic

my_vuln/totolink4/vuln_54/54.md at main · wudipjq/my_vuln · GitHub

https://github.com/wudipjq/my_vuln/blob/main/totolink4/vuln_54/54.md

Vendor Advisories for CVE-2026-9531(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 / 41× 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.

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

Frequently asked(5)

What is CVE-2026-9531?
CVE-2026-9531 is a medium vulnerability published on May 26, 2026. A weakness has been identified in Totolink CA750-PoE 6.2c.510. Impacted is the function setUpgradeUboot of the file /cgi-bin/cstecgi.cgi of the component Setting Handler. This manipulation of the argument FileName causes os command injection. The attack is possible to be carried out remotely. The…
When was CVE-2026-9531 disclosed?
CVE-2026-9531 was first published in the National Vulnerability Database on May 26, 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-2026-9531 actively exploited?
CVE-2026-9531 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 76.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-9531?
CVE-2026-9531 has a CVSS v3 base score of 6.3 (NVD).
How do I remediate CVE-2026-9531?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-9531, 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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