ZBL EPON ONU Broadband Router V100R001 Privilege Escalation via Configuration Endpoint
Published Dec 31, 2025
8.7
HIGHCVSS 4.0
EPSS 0.29%
Description
ZBL EPON ONU Broadband Router V100R001 contains a privilege escalation vulnerability that allows limited administrative users to elevate access by sending requests to configuration endpoints. Attackers can exploit the vulnerability by accessing the configuration backup or password page to disclose the super user password and gain additional privileged functionalities.
Affected products
-
- Version 1.0StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Zblchina | ZBL EPON ONU Broadband Router | n/a |
|
No data.
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
1 other source (NVD) ▾
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
PoCAutomatable
NoTechnical Impact
TotalDecision
n/aAssessed Jan 2, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
Jan–Oct 2026- EPSS v4
- EPSS v5
Percentile over time
- EPSS v4
- EPSS v5
Table of values (3 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.29% (0.00287) | 19.18th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.25% (0.00247) | 15.66th | v5 (v2026.06.15) |
| Jan 1, 2026 | 0.03% (0.00033) | 9.19th | v4 (v2025.03.14) |
References (5)
- http://www.zblchina.com product
- https://web.archive.org/web/20211220094023/http://www.wd-thailand.com/ product
- https://www.exploit-db.com/exploits/49737 exploit
- https://www.vulncheck.com/advisories/zbl-epon-onu-broadband-router-vr-privilege-escalation-via-configuration-endpoint third-party-advisory
- https://www.zeroscience.mk/en/vulnerabilities/ZSL-2021-5647.php third-party-advisory
| Link | Providers | Tags |
|---|---|---|
| http://www.zblchina.com | product | |
| https://web.archive.org/web/20211220094023/http://www.wd-thailand.com/ | product | |
| https://www.exploit-db.com/exploits/49737 | exploit | |
| https://www.vulncheck.com/advisories/zbl-epon-onu-broadband-router-vr-privilege-escalation-via-configuration-endpoint | third-party-advisory | |
| https://www.zeroscience.mk/en/vulnerabilities/ZSL-2021-5647.php | third-party-advisory |
Change history (0)
No recorded changes yet.