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.
CVE-2026-74232
“—” beside the score: it is equal to the CVSS score beside it.
Score elevated to 9.8 because this CVE is listed on ENISA's EU Known Exploited Vulnerabilities catalogue (Source: ENISA EUVD), indicating that ENISA records real-world exploitation of it. It is not on CISA's Known Exploited Vulnerabilities catalog. A secondary CVSS source baseline 9.8 retained for reference (NVD's own analysis pending). Confidence: HIGH.
Also known asEUVD-2026-66999 (ENISA EUVD) · GHSA-jgcj-chrm-4hhc (GitHub Security Advisories)Source: ENISA EUVD
- Exploited in the wild, as ENISA's EU KEV records it (Source: ENISA EUVD); CISA has not listed it
- CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
No fix is confirmed yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for the fix.
- CVSS v3
- 9.8
- EG Score
- 9.8CRITICALhigh confidence
- EG Risk
- 99EG Risk 99/100
EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.
How it’s computed (value × EchelonGraph’s weight)Severity98% × 45%Impact severity (EG Severity): CVSS 9.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.Exploitation100% × 40%Fixed at 100% for an ENISA EU KEV listing (CISA's catalog does not list this CVE): EchelonGraph's rule. Source: ENISA EUVD.Automatability100% × 15%CISA's SSVC Automatable value: yes (Vulnrichment).SSVC (CISA's decision table, applied by EchelonGraph): Attend at low mission impact; Act at medium or high.Exploitation active (ENISA EU KEV listing; Source: ENISA EUVD) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). From CISA's SSVC values (Vulnrichment): automatable and technical impact; the others come from the sources named beside them. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation sooner than your standard update timelines at low mission impact and as soon as possible at medium or high, and watch the vendor's advisory for the fix. - EPSS PROB
- 0.8%
- EPSS %ILE
- 57th
- KEV
- Not in CISA'sENISA's EU KEV lists it (below). Source: ENISA EUVD
What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)
The EG score (9.8): severity, escalated by confirmed exploitation. This CVE's 9.8 is its impact severity (EG Severity), not escalated.
- EG Severity
- 9.8 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
- EG Likelihood
- 0.8% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-30). FIRST's exploitation probability, not an EchelonGraph model.
- Confirmed exploitation
- ENISA EU KEV (Source: ENISA EUVD)Reported apart from the likelihood: an observed fact, not a probability.
- EG Priority
- SSVC Act at medium mission impactAttend at low mission impact; Act at medium or high.CISA BOD 26-04: 3 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.
ENISA EU KEV: listed August 27, 2026, reported by ENISA; not on CISA's KEV catalog.
Source: ENISA EUVD (EU Known Exploited Vulnerabilities catalogue), reproduced with acknowledgement. How a listing moves the EG score
SSVC (CISA's decision table, applied by EchelonGraph)Attend at low mission impact; Act at medium or high.
No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation sooner than your standard update timelines at low mission impact and as soon as possible at medium or high, and watch the vendor's advisory for the fix.
Exploitation active (ENISA EU KEV listing; Source: ENISA EUVD) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). From CISA's SSVC values (Vulnrichment): automatable and technical impact; the others come from the sources named beside them. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table
BOD 26-04 (CISA's remediation timeline, Table 1)3 days if the affected system is publicly exposed; 60 days if it is not.
In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it
Published
August 27, 2026
Last Modified
September 24, 2026
Advisory Details (2)
Auto-updated Oct 31, 2026Zbtlink MQWrt yunmgrd Cloud C2 Implant | Advisories | VulnCheck
https://www.vulncheck.com/advisories/zbtlink-mqwrt-yunmgrd-cloud-c2-implantChinese Implants in the Supply Chain | Blog | VulnCheck
http://vulncheck.com/blog/zbt-darklantern-speakingstoneVendor 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 22× in last 7d / 119× in last 30d)
Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.
Showing the most recent 100 of 368 refreshes on record for this CVE.
A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 268 oldest rows on record are not shown and were not checked, so the counts can still include repeats.
- 2026-10-30 18:23 UTCEG score recompute
- 2026-10-30 18:23 UTCGHSA enrichmentGHSA-jgcj-chrm-4hhc · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.8% · 57th percentile
- 2026-10-29 17:43 UTCEG score recompute
- 2026-10-29 17:43 UTCGHSA enrichmentGHSA-jgcj-chrm-4hhc · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-29 16:34 UTCEPSS rescoreEPSS 0.8% · 56th percentile
- 2026-10-28 17:02 UTCEG score recompute
- 2026-10-28 17:02 UTCGHSA enrichmentGHSA-jgcj-chrm-4hhc · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.8% · 56th percentile
- 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.8% · 56th percentile
- 2026-10-27 16:12 UTCEG score recompute
- 2026-10-27 16:11 UTCGHSA enrichmentGHSA-jgcj-chrm-4hhc · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.8% · 56th percentile
- 2026-10-26 15:21 UTCEG score recompute
- 2026-10-26 15:21 UTCGHSA enrichmentGHSA-jgcj-chrm-4hhc · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-25 16:34 UTCEPSS rescoreEPSS 0.8% · 56th percentile
- 2026-10-25 13:47 UTCEG score recompute
- 2026-10-25 13:47 UTCGHSA enrichmentGHSA-jgcj-chrm-4hhc · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-25 13:46 UTCENISA EU KEV listingEUVD-2026-66999 · listed August 27, 2026 · reported by ENISA · Source: ENISA EUVD
- 2026-10-25 07:33 UTCEG score recompute
- 2026-10-25 07:33 UTCGHSA enrichmentGHSA-jgcj-chrm-4hhc · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.8% · 56th percentile
- 2026-10-24 06:52 UTCEG score recompute
- 2026-10-24 06:51 UTCGHSA enrichmentGHSA-jgcj-chrm-4hhc · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.8% · 56th percentile
Show 75 moreShow fewer
- 2026-10-23 06:10 UTCEG score recompute
- 2026-10-23 06:09 UTCGHSA enrichmentGHSA-jgcj-chrm-4hhc · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.8% · 56th percentile
- 2026-10-22 05:23 UTCEG score recompute
- 2026-10-22 05:23 UTCGHSA enrichmentGHSA-jgcj-chrm-4hhc · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.8% · 56th percentile
- 2026-10-21 04:41 UTCEG score recompute
- 2026-10-21 04:41 UTCGHSA enrichmentGHSA-jgcj-chrm-4hhc · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.8% · 56th percentile
- 2026-10-20 03:59 UTCEG score recompute
- 2026-10-20 03:59 UTCGHSA enrichmentGHSA-jgcj-chrm-4hhc · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.8% · 56th percentile
- 2026-10-19 03:13 UTCEG score recompute
- 2026-10-19 03:13 UTCGHSA enrichmentGHSA-jgcj-chrm-4hhc · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-18 03:14 UTCEG score recompute
- 2026-10-18 02:30 UTCEG score recompute
- 2026-10-18 02:30 UTCGHSA enrichmentGHSA-jgcj-chrm-4hhc · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.8% · 56th percentile
- 2026-10-17 01:48 UTCEG score recompute
- 2026-10-17 01:48 UTCGHSA enrichmentGHSA-jgcj-chrm-4hhc · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-16 16:44 UTCEPSS rescoreEPSS 0.8% · 56th percentile
- 2026-10-16 01:04 UTCEG score recompute
- 2026-10-16 01:04 UTCGHSA enrichmentGHSA-jgcj-chrm-4hhc · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.8% · 56th percentile
- 2026-10-14 20:04 UTCEG score recompute
- 2026-10-14 20:04 UTCGHSA enrichmentGHSA-jgcj-chrm-4hhc · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.8% · 56th percentile
- 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-10-13 16:13 UTCEG score recompute
- 2026-10-13 16:13 UTCGHSA enrichmentGHSA-jgcj-chrm-4hhc · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-10-12 15:32 UTCEG score recompute
- 2026-10-12 15:32 UTCGHSA enrichmentGHSA-jgcj-chrm-4hhc · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-12 05:40 UTCGHSA enrichmentGHSA-jgcj-chrm-4hhc · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-11 19:26 UTCEG score recompute
- 2026-10-11 16:41 UTCEG score recompute
- 2026-10-11 14:01 UTCEG score recompute
- 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-10-10 15:12 UTCGHSA enrichmentGHSA-jgcj-chrm-4hhc · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-10 11:01 UTCGHSA enrichmentGHSA-jgcj-chrm-4hhc · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-10 06:30 UTCGHSA enrichmentGHSA-jgcj-chrm-4hhc · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-10 02:08 UTCEG score recompute
- 2026-10-10 02:08 UTCGHSA enrichmentGHSA-jgcj-chrm-4hhc · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-10-09 07:19 UTCGHSA enrichmentGHSA-jgcj-chrm-4hhc · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-09 03:09 UTCEG score recompute
- 2026-10-09 03:09 UTCGHSA enrichmentGHSA-jgcj-chrm-4hhc · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-10-08 09:41 UTCGHSA enrichmentGHSA-jgcj-chrm-4hhc · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-08 05:31 UTCGHSA enrichmentGHSA-jgcj-chrm-4hhc · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-08 01:21 UTCEG score recompute
- 2026-10-08 01:21 UTCGHSA enrichmentGHSA-jgcj-chrm-4hhc · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-10-07 09:26 UTCGHSA enrichmentGHSA-jgcj-chrm-4hhc · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-07 05:16 UTCGHSA enrichmentGHSA-jgcj-chrm-4hhc · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-07 01:07 UTCGHSA enrichmentGHSA-jgcj-chrm-4hhc · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-06 20:42 UTCGHSA enrichmentGHSA-jgcj-chrm-4hhc · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-06 15:57 UTCEG score recompute
- 2026-10-06 15:57 UTCGHSA enrichmentGHSA-jgcj-chrm-4hhc · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-10-06 11:48 UTCGHSA enrichmentGHSA-jgcj-chrm-4hhc · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-06 07:33 UTCGHSA enrichmentGHSA-jgcj-chrm-4hhc · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-06 00:54 UTCEG score recompute
- 2026-10-06 00:54 UTCGHSA enrichmentGHSA-jgcj-chrm-4hhc · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-10-05 17:04 UTCGHSA enrichmentGHSA-jgcj-chrm-4hhc · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-05 12:55 UTCGHSA enrichmentGHSA-jgcj-chrm-4hhc · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-05 08:45 UTCGHSA enrichmentGHSA-jgcj-chrm-4hhc · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-05 04:36 UTCGHSA enrichmentGHSA-jgcj-chrm-4hhc · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-04 23:49 UTCEG score recompute
- 2026-10-04 23:49 UTCGHSA enrichmentGHSA-jgcj-chrm-4hhc · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-10-04 19:39 UTCGHSA enrichmentGHSA-jgcj-chrm-4hhc · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-10-04 14:38 UTCGHSA enrichmentGHSA-jgcj-chrm-4hhc · GitHub severity CRITICAL · GitHub CVSS 9.8
Related CVEs(same CWE)
Same CWE
10 shownCWE-300 · CWE-506
Frequently asked(5)
What is CVE-2026-74232?
When was CVE-2026-74232 made public?
Is CVE-2026-74232 actively exploited?
What is the CVSS score of CVE-2026-74232?
How do I remediate CVE-2026-74232?
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-74232
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