CVE-2018-8062: A cross-site scripting (XSS) vulnerability on Comtrend AR-5387un devices with A731-410JAZ-C04_R02.A2pD035g.d23

Routine

MEDIUM 5.4MITIGATE

CVE-2018-8062 is a medium-severity flaw (CVSS 5.4) affecting ar-5387un firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A cross-site scripting (XSS) vulnerability on Comtrend AR-5387un devices with A731-410JAZ-C04_R02.A2pD035g.d23i firmware allows remote attackers to inject arbitrary web script or HTML via the Service Description parameter while creating a WAN service.

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	1.0% (top 38%)
CISA exploited list	No
Weakness	CWE-79
Published	2020-10-23
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: comtrend

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-10-23 05:15 UTCPublished CVE record published
2026-06-17 02:04 UTCUpdated Record last modified

comtrend ar-5387un firmware MITIGATE

Affected: a731-410jaz-c04_r02.a2pd035g.d23i

Fixed in: no fixed release known

Safe to downgrade to: a release before a731-410jaz-c04_r02.a2pd035g.d23i

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2018-8062?

ar-5387un firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2018-8062 being exploited?

CVE-2018-8062 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2018-8062 affect?

CVE-2018-8062 affects ar-5387un firmware. Severity is medium (CVSS 5.4). A cross-site scripting (XSS) vulnerability on Comtrend AR-5387un devices with A731-410JAZ-C04_R02.A2pD035g.d23i firmware allows remote attackers to inject arbitrary web script or HTML via the Service Description parameter while creating a W

How urgent is CVE-2018-8062?

Priority 39/100. Public exploit reference

References

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