CVE-2026-74232Zbtlink MQWrt yunmgrd Cloud C2 Implant
Updated under an hour ago ()
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It affects Zbtlink L3_V2_8 and 14 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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
- 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-506, CWE-300
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Deferred
- Record last updated
- Aug 27, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Zbtlink L3_V2_8 zbtlink:l3_v2_8 (from the name) | 3.0.0.4.528 | CNA record |
Zbtlink WE826-T2 zbtlink:we826_t2 (from the name) | 19.1101 | CNA record |
Zbtlink ZBT-7628 zbtlink:zbt_7628 (from the name) | 1.0.0.2.007 | CNA record |
Zbtlink ZBT-ZBT7621 zbtlink:zbt_zbt7621 (from the name) | 1.0.0.3.001 | CNA record |
MoreQuick MQAC-7620 morequick:mqac_7620 (from the name) | 1.0.0.2.000 | CNA record |
MoreQuick MQAC-7620A morequick:mqac_7620a (from the name) | 1.0.0.2.000 | CNA record |
MoreQuick MQAP-7620 morequick:mqap_7620 (from the name) | 1.0.0.2.000 | CNA record |
MoreQuick MQAP-7620A morequick:mqap_7620a (from the name) | 1.0.0.2.000 | CNA record |
MoreQuick MQAP-7628 morequick:mqap_7628 (from the name) | 1.0.0.2.000 | CNA record |
Unknown AP522 unknown:ap522 (from the name) | 1.0.0.2.014 | CNA record |
Unknown AP7628 unknown:ap7628 (from the name) | 3.0.0.4.380 | CNA record |
Unknown APG721B unknown:apg721b (from the name) | 19.0809 | CNA record |
Unknown HC5661A unknown:hc5661a (from the name) | 3.0.0.4.380 | CNA record |
Unknown HK300 unknown:hk300 (from the name) | 1.0.0.2.032 | CNA record |
Unknown MAP-N10 unknown:map_n10 (from the name) | 1.0.0.2.044 | CNA record |
References
- http://vulncheck.com/blog/zbt-darklantern-speakingstonetechnical-description, exploit
- https://www.vulncheck.com/advisories/zbtlink-mqwrt-yunmgrd-cloud-c2-implantthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.