CVE-2026-74233

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-27. a secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 3%CVSS: 9.8Exploit: None knownExposed: 0

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

Zbtlink WE1326, WE357, WE5926, WE5926-WD, WE826-Q, WE826-T2, WE826-WD, WG108, and WG3526 firmware 19.1101, Zbtlink WE2426-C firmware 19.1112, Zbtlink WE5926-EC_QP firmware 20.0516, Zbtlink WF3526-P firmware 19.051, CTN720-W1, LF-1541, and MT7620N firmware 19.1101, and WRC1 firmware 20.0622 contain an unauthenticated command injection in the infosrvd service (UDP/9992). A remote unauthenticated attacker can send a crafted UDP packet to execute arbitrary commands as root. The service's authentication uses a hardcoded salt and an all-zero wildcard MAC bypass, rendering it ineffective.

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
50(Track)
EG Risk 50/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation3% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
3%
EPSS %ILE
85%
KEV
Not listed

Published

August 27, 2026

Last Modified

August 27, 2026

Advisory Details (2)

Auto-updated Sep 17, 2026
⚠️ Active exploitation confirmed. No patch confirmed yet.
generic

Zbtlink MQWrt infosrvd Command Injection | Advisories | VulnCheck

https://www.vulncheck.com/advisories/zbtlink-mqwrt-infosrvd-command-injection
generic🔴 Active Exploitation

Chinese Implants in the Supply Chain | Blog | VulnCheck

http://vulncheck.com/blog/zbt-darklantern-speakingstone

Vendor Advisories for CVE-2026-74233(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 50× in last 7d / 175× 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 175 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-74233?
CVE-2026-74233 is a critical vulnerability published on August 27, 2026. Zbtlink WE1326, WE357, WE5926, WE5926-WD, WE826-Q, WE826-T2, WE826-WD, WG108, and WG3526 firmware 19.1101, Zbtlink WE2426-C firmware 19.1112, Zbtlink WE5926-EC_QP firmware 20.0516, Zbtlink WF3526-P firmware 19.051, CTN720-W1, LF-1541, and MT7620N firmware 19.1101, and WRC1 firmware 20.0622 contain…
When was CVE-2026-74233 disclosed?
CVE-2026-74233 was first published in the National Vulnerability Database on August 27, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-74233 actively exploited?
CVE-2026-74233 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 3% probability of exploitation in the next 30 days, which ranks it in the top 15.1% of all scored CVEs.
What is the CVSS score of CVE-2026-74233?
CVE-2026-74233 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-74233?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-74233, 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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