THREATPORT/VULNERABILITY/CVE-2021-46387
MEDIUM SEVERITY

CVE-2021-46387

Zywall 2 Plus Internet Security Appliance Firmware vulnerability

CVSS
6.1
EPSS
21.0%
EPSS pct
97th
Exploited
No known
ZyXEL ZyWALL 2 Plus Internet Security Appliance is affected by Cross Site Scripting (XSS). Insecure URI handling leads to bypass security restriction to achieve Cross Site Scripting, which allows an attacker able to execute arbitrary JavaScript codes to perform multiple attacks such as clipboard hijacking and session hijacking.
Affected vendor
Zyxel
Affected product
Zywall 2 Plus Internet Security Appliance Firmware
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness type (CWE)
  • CWE-79 — Cross-Site Scripting (XSS)
Published
2022-03-01

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, user interaction. Successful exploitation leads to low impact to confidentiality, low impact to integrity.

Its EPSS score of 21.0% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 97% of all scored CVEs.

Check your external exposure to CVE-2021-46387

  • Confirm whether Zyxel Zywall 2 Plus Internet Security Appliance Firmware is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2021-46387.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2021-46387

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2021-46387 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

Run a free external exposure scan

Are you exposed to CVE-2021-46387?

Run an instant, non-intrusive external scan to check your attack surface for CVE-2021-46387.

Start free scan

No credit card. Agentless.

Related vulnerabilities

MEDIUM
CVE-2007-3644
Libarchive vulnerability
MEDIUM
CVE-2007-3645
Libarchive vulnerability
MEDIUM
CVE-2007-3780
Community Server vulnerability