CVE-2020-9420: The login password of the web administrative dashboard in Arcadyan Wifi routers VRV9506JAC23 is sent in cleart

Routine

MEDIUM 6.5MITIGATE

CVE-2020-9420 is a medium-severity flaw (CVSS 6.5) affecting vrv9506jac23 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The login password of the web administrative dashboard in Arcadyan Wifi routers VRV9506JAC23 is sent in cleartext, allowing an attacker to sniff and intercept traffic to learn the administrative credentials to the router.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.5% (top 58%)
CISA exploited list	No
Weakness	CWE-319
Published	2022-12-14
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: arcadyan

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

Am I affected?

Timeline

2022-12-14 01:15 UTCPublished CVE record published
2026-06-17 03:27 UTCUpdated Record last modified

arcadyan vrv9506jac23 firmware MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

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-2020-9420?

vrv9506jac23 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2020-9420 being exploited?

CVE-2020-9420 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-2020-9420 affect?

CVE-2020-9420 affects vrv9506jac23 firmware. Severity is medium (CVSS 6.5). The login password of the web administrative dashboard in Arcadyan Wifi routers VRV9506JAC23 is sent in cleartext, allowing an attacker to sniff and intercept traffic to learn the administrative credentials to the router.

How urgent is CVE-2020-9420?

Priority 38/100. Public exploit reference

Software pages

Wi-Fi vulnerabilities

Related CVEs

CVE-2020-9419 MEDIUM 5.4 MITIGATE Multiple stored cross-site scripting (XSS) vulnerabilities in Arcadyan Wifi routers VRV9506JAC23 allow remote

References

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