CVE-2021-25811

HIGH
7.5
CVSS Score
Published: April 29, 2021 at 03:44 PM UTC
Updated: June 17, 2026 at 03:42 AM UTC
2 products affected across 1 vendorMercury X18G FirmwareMercury X18G

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Severity
HIGH7.5
Exploit prediction
EPSS 2%

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

mercusys-mercury-x18g (same device)
All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
NVD-CWE-noinfo

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