Vulnerability in Mercusys Mercury X18g
CVE-2021-25811
MERCUSYS Mercury X18G 1.0.5 devices allow Denial of service via a crafted value to the POST listen_http_lan parameter. Upon subsequent device restarts after this vulnerability is exploted the device will not be able to access the webserver unless the listen_http_lan parameter to uhttpd.json is manually fixed.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.016 (75.3th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 75th percentile — 75.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.016 · newest: 0.016 · change: 0.000
Affected products
- Mercusys Mercury X18g
- Mercusys Mercury X18g Firmware — versions 1.0.5
Public proof-of-concept exploits
References
- www.mercusys.com/en/ (Vendor Advisory)
- www.mercurycom.com.cn/product-521-1.html (Product, Vendor Advisory)
- github.com/pokerfacett/MY_REQUEST/blob/master/Mercury Router X18g v1.0.5 Denial… (Broken Link)
Frequently asked questions
- What is CVE-2021-25811?
- CVE-2021-25811 is a high-severity vulnerability in Mercusys Mercury X18g. CVSS score: 7.5/10. Published 2021-04-29.
- How severe is CVE-2021-25811?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2021-25811 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.