CVE-2026-74232: Zbtlink MQWrt yunmgrd Cloud C2 Implant
- Is it exploited?
Reported, not confirmed by CISA. VulnCheck KEV lists it as exploited in the wild. CISA has not added it to its Known Exploited Vulnerabilities catalog as of .
VulnCheck KEV lists it since . It cites 1 public report, the first from .
- How likely is exploitation in the next 30 days?
- 0.8%
EPSS score, percentile 57 of all scored records. A probability estimated by FIRST, not a report of exploitation.
CISA's SSVC assessment in the CVE record lists exploitation as poc.
- How severe?
- 9.3 Critical
CVSS v4.0 base score, given by the CNA
- What should I do?
CISA has set no required action, because the vulnerability is not in KEV.
The CVE record links no vendor advisory, patch or mitigation.
- Which versions are affected?
Affected
- 3.0.0.4.528
- 19.1101
- 1.0.0.2.007
- 1.0.0.3.001
- 1.0.0.2.000
- 1.0.0.2.000
and 9 more in the table below
Source: CISA KEV 2026.10.29, as of ; VulnCheck KEV, as of ; FIRST EPSS, as of ; CVE List, as of . About the data.
Description
Zbtlink MQWrt yunmgrd Cloud C2 Implant
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.
Source: CVE List, as of . About the data.
What to do
Advisories and patches
The CVE record links no vendor advisory, patch or mitigation.
This summary is based on the CVE record as of . Check the vendor's advisory before you act: affected versions and fixes can change.
Affected products and versions
Versions by product, as listed in the CVE record (15 products)
| Status | Versions |
|---|---|
| Affected | 3.0.0.4.528 |
Versions not listed are: unknown.
| Status | Versions |
|---|---|
| Affected | 19.1101 |
Versions not listed are: unknown.
| Status | Versions |
|---|---|
| Affected | 1.0.0.2.007 |
Versions not listed are: unknown.
| Status | Versions |
|---|---|
| Affected | 1.0.0.3.001 |
Versions not listed are: unknown.
| Status | Versions |
|---|---|
| Affected | 1.0.0.2.000 |
Versions not listed are: unknown.
| Status | Versions |
|---|---|
| Affected | 1.0.0.2.000 |
Versions not listed are: unknown.
| Status | Versions |
|---|---|
| Affected | 1.0.0.2.000 |
Versions not listed are: unknown.
| Status | Versions |
|---|---|
| Affected | 1.0.0.2.000 |
Versions not listed are: unknown.
| Status | Versions |
|---|---|
| Affected | 1.0.0.2.000 |
Versions not listed are: unknown.
| Status | Versions |
|---|---|
| Affected | 1.0.0.2.014 |
Versions not listed are: unknown.
| Status | Versions |
|---|---|
| Affected | 3.0.0.4.380 |
Versions not listed are: unknown.
| Status | Versions |
|---|---|
| Affected | 19.0809 |
Versions not listed are: unknown.
| Status | Versions |
|---|---|
| Affected | 3.0.0.4.380 |
Versions not listed are: unknown.
| Status | Versions |
|---|---|
| Affected | 1.0.0.2.032 |
Versions not listed are: unknown.
| Status | Versions |
|---|---|
| Affected | 1.0.0.2.044 |
Versions not listed are: unknown.
Source: CVE List, as of . About the data.
Weakness
CWE-506, CWE-300, 3 CAPEC
Attack patterns (CAPEC)
CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record.
Timeline
| Date | Event |
|---|---|
| CVE record published |