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Back to active CVEs
Critical ยท CVSS 9.8CVE-2026-74232

Zbtlink MQWrt yunmgrd Cloud C2 ImplantCVE-2026-74232

Answer in brief

CVE-2026-74232 records a Critical severity (CVSS 9.8) vulnerability in Zbtlink MQWrt yunmgrd Cloud C2 Implant. The current sources do not mark it as known exploited. The current feed maps Unknown/AP522 (generic), Unknown/AP7628 (generic), Unknown/APG721B (generic), Unknown/HC5661A (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 27, 2026Updated Sep 24, 2026Source checked Oct 11, 2026First seen by HOL Aug 27, 2026Material review Sep 24, 2026
Upstream Advisory

Key facts

Risk
Critical ยท CVSS 9.8
Exploitation
Not marked as known exploited
Affected software
15 mapped packages or products
Fix availability
Not reported

Why this deserves its current priority

CVSS is 9.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Unknown/AP522 (generic), Unknown/AP7628 (generic), Unknown/APG721B (generic), Unknown/HC5661A (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Unknown/AP522generic1.0.0.2.014Not reported
Unknown/AP7628generic3.0.0.4.380Not reported
Unknown/APG721Bgeneric19.0809Not reported
Unknown/HC5661Ageneric3.0.0.4.380Not reported
Unknown/HK300generic1.0.0.2.032Not reported
Zbtlink/L3_V2_8generic3.0.0.4.528Not reported
Unknown/MAP-N10generic1.0.0.2.044Not reported
MoreQuick/MQAC-7620generic1.0.0.2.000Not reported
MoreQuick/MQAC-7620Ageneric1.0.0.2.000Not reported
MoreQuick/MQAP-7620generic1.0.0.2.000Not reported
MoreQuick/MQAP-7620Ageneric1.0.0.2.000Not reported
MoreQuick/MQAP-7628generic1.0.0.2.000Not reported
Zbtlink/WE826-T2generic19.1101Not reported
Zbtlink/ZBT-7628generic1.0.0.2.007Not reported
Zbtlink/ZBT-ZBT7621generic1.0.0.3.001Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Unknown/AP522, Unknown/AP7628, Unknown/APG721B.
  2. 2Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

  1. Published upstream

    Aug 27, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Sep 24, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Aug 27, 2026

Sources and claim methodology

  • Source referencevulncheck.com
  • Source referencevulncheck.com
Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.

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Record context

Vulnerability class
Missing Auth
EPSS
Not reported
CWE IDs
CWE-506, CWE-300
Source
CVE List V5
Source checked
Oct 11, 2026
References
2 linked sources
Open source record