CVE-2026-74232

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 — 4 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: 0%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 L3_V2_8 firmware 3.0.0.4.528, Zbtlink WE826-T2 firmware 19.1101, Zbtlink ZBT-7628 firmware 1.0.0.2.007, Zbtlink ZBT-ZBT7621 firmware 1.0.0.3.001, MoreQuick MQAC-7620, MQAC-7620A, MQAP-7620, MQAP-7620A, and MQAP-7628 firmware 1.0.0.2.000, AP522 firmware 1.0.0.2.014, AP7628 and HC5661A firmware 3.0.0.4.380, APG721B firmware 19.0809, HK300 firmware 1.0.0.2.032, and MAP-N10 firmware 1.0.0.2.044 ship a backdoor command-and-control implant (yunmgrd) reachable over an unauthenticated cleartext UDP channel to a hardcoded C2 server. A remote unauthenticated attacker on the network path can hijack the channel and execute arbitrary commands as root. The attacker can also modify DNS entries, exfiltrate PPPoE credentials, and open reverse SSH tunnels.

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
49(Track)
EG Risk 49/100SSVC: 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%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
39%
KEV
Not listed

Published

August 27, 2026

Last Modified

August 27, 2026

Advisory Details (2)

Auto-updated Aug 27, 2026
⚠️ Active exploitation confirmed. No patch confirmed yet.
generic

Zbtlink MQWrt yunmgrd Cloud C2 Implant | Advisories | VulnCheck

https://www.vulncheck.com/advisories/zbtlink-mqwrt-yunmgrd-cloud-c2-implant
generic🔴 Active Exploitation

Chinese Implants in the Supply Chain | Blog | VulnCheck

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

Vendor Advisories for CVE-2026-74232(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 23× in last 7d / 23× 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. 2026-08-30 05:50 UTCGHSA enrichment
  2. 2026-08-30 01:39 UTCEG score recompute
  3. 2026-08-30 01:39 UTCGHSA enrichment
  4. 2026-08-30 01:22 UTCEPSS rescore
  5. 2026-08-29 21:30 UTCGHSA enrichment
  6. 2026-08-29 17:20 UTCGHSA enrichment
  7. 2026-08-29 12:32 UTCGHSA enrichment
  8. 2026-08-29 08:21 UTCGHSA enrichment
  9. 2026-08-29 04:08 UTCGHSA enrichment
  10. 2026-08-28 23:56 UTCEG score recompute
  11. 2026-08-28 23:56 UTCGHSA enrichment
  12. 2026-08-28 21:42 UTCEPSS rescore
  13. 2026-08-28 18:33 UTCGHSA enrichment
  14. 2026-08-28 14:18 UTCGHSA enrichment
  15. 2026-08-28 10:07 UTCGHSA enrichment
  16. 2026-08-28 05:57 UTCGHSA enrichment
  17. 2026-08-28 01:46 UTCGHSA enrichment
  18. 2026-08-27 21:36 UTCGHSA enrichment
  19. 2026-08-27 17:27 UTCEG score recompute
  20. 2026-08-27 17:27 UTCGHSA enrichment
  21. 2026-08-27 13:32 UTCEG score recompute
  22. 2026-08-27 12:59 UTCEG score recompute
  23. 2026-08-27 12:58 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-74232?
CVE-2026-74232 is a critical vulnerability published on August 27, 2026. Zbtlink L3V28 firmware 3.0.0.4.528, Zbtlink WE826-T2 firmware 19.1101, Zbtlink ZBT-7628 firmware 1.0.0.2.007, Zbtlink ZBT-ZBT7621 firmware 1.0.0.3.001, MoreQuick MQAC-7620, MQAC-7620A, MQAP-7620, MQAP-7620A, and MQAP-7628 firmware 1.0.0.2.000, AP522 firmware 1.0.0.2.014, AP7628 and HC5661A firmware…
When was CVE-2026-74232 disclosed?
CVE-2026-74232 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-2026-74232 actively exploited?
CVE-2026-74232 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 61.0% of all scored CVEs.
What is the CVSS score of CVE-2026-74232?
CVE-2026-74232 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-74232?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-74232, 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

Explore the affected products and dependency analysis for CVE-2026-74232

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