CVE-2021-23242: mercusys mercury_x18g_firmware Path Traversal
Modified
Published 07-01-2021Last modified 03-08-2024
Vulnerability summary
CVE-2021-23242 is a medium (CVSS 5.3) Path Traversal vulnerability in mercusys mercury_x18g_firmware. EPSS estimates a 1.83% chance of exploitation in the next 30 days, higher than 78.6% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
5.3/10
010
Medium · v3.1 (NVD)EPSS score
1.83%
0%100%
Low · +0.02 pp in 30 daysKEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits1github
Timeline
- 07-01-2021PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
Description
MERCUSYS Mercury X18G 1.0.5 devices allow Directory Traversal via ../ to the UPnP server, as demonstrated by the /../../conf/template/uhttpd.json URI.
CVSS metrics
2 scores · 1 source · 2 versionsMedium 5.3Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:NSourcesSingle source
Medium 5.0Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:P/I:N/A:NSourcesSingle source
EPSS trend
Probability
1.83%
Chance of exploitation in the next 30 days
Percentile
79%
Versus all other CVEs
30-day change
Increase +0.02 pp
From 1.81% on 22-09-2026
22-09-202622-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
1 foundMy Request
Maturity: poc
Weaknesses
CWE · root causeAffected systems
Mercusys1 product
1 vendor · 1 product