CVE-2021-23242

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

1.81% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 76.6% of scored records. A rank, not a probability.

NVD base score

5.3 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2021-01-07 20:19Z5 YR AGO

Last updated

2024-08-03 19:05Z2 YR AGO

Reserved

2021-01-07

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')Base

Data version

5.1

Document digest

68bd78d2ef3bd3f97ca986b4be4d6e06e58853c8c6afac01d845cb66c2875163

• www.mercusys.comhttps://www.mercusys.com/en/x_refsource_MISC
• www.mercurycom.com.cnhttps://www.mercurycom.com.cn/product-521-1.htmlx_refsource_MISC
• github.comhttps://github.com/BATTZION/MY_REQUEST/blob/master/Mercury%20Router%20Upnp%20Server%20Directory%20Traversal.mdx_refsource_MISC