CVE-2026-3040

MEDIUMNVD 4.74.7—
EchelonGraph scoreMEDIUM confidence

Score 4.7 from GitHub Security Advisory published 2026-02-24. NVD baseline CVSS 4.7; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
4.7
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 9%CVSS: 4.7Exploit: NoneExposed: 0

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

A vulnerability was identified in DrayTek Vigor 300B up to 1.5.1.6. This affects the function cgiGetFile of the file /cgi-bin/mainfunction.cgi/uploadlangs of the component Web Management Interface. The manipulation of the argument File leads to os command injection. The attack may be initiated remotely. The exploit is publicly available and might be used. The vendor confirms that "300B is EoL, and this is an authenticated vulnerability. We don't plan to fix it." This vulnerability only affects products that are no longer supported by the maintainer.

CVSS v3
4.7
EG Score
4.7(medium)
EPSS
94.7%
KEV
Not listed

Published

February 23, 2026

Last Modified

April 29, 2026

References (4)

Weakness Classification(2)

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

Data Freshness Timeline

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-3040?
CVE-2026-3040 is a medium vulnerability published on February 23, 2026. A vulnerability was identified in DrayTek Vigor 300B up to 1.5.1.6. This affects the function cgiGetFile of the file /cgi-bin/mainfunction.cgi/uploadlangs of the component Web Management Interface. The manipulation of the argument File leads to os command injection. The attack may be initiated…
When was CVE-2026-3040 disclosed?
CVE-2026-3040 was first published in the National Vulnerability Database on February 23, 2026, with the most recent update on April 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-3040 actively exploited?
CVE-2026-3040 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 94.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-3040?
CVE-2026-3040 has a CVSS v3 base score of 4.7 (NVD).
How do I remediate CVE-2026-3040?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-3040, 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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