CVE-2020-11681: Castel NextGen DVR v1.0.0 stores and displays credentials for the associated SMTP server in cleartext

This month

HIGH 8.1MITIGATE

CVE-2020-11681 is a high-severity flaw (CVSS 8.1) affecting nextgen dvr firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Castel NextGen DVR v1.0.0 stores and displays credentials for the associated SMTP server in cleartext. Low privileged users can exploit this to create an administrator user and obtain the SMTP credentials.

Why this priority

High severity

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

Risk facts

CVSS score	8.1 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	1.1% (top 33%)
CISA exploited list	No
Weakness	CWE-522
Published	2020-06-04
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: castel

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

Am I affected?

Timeline

2020-06-04 19:15 UTCPublished CVE record published
2026-06-17 02:50 UTCUpdated Record last modified

castel nextgen dvr firmware MITIGATE

Affected: 1.0.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0.0

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-2020-11681?

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

Is CVE-2020-11681 being exploited?

CVE-2020-11681 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-2020-11681 affect?

CVE-2020-11681 affects nextgen dvr firmware. Severity is high (CVSS 8.1). Castel NextGen DVR v1.0.0 stores and displays credentials for the associated SMTP server in cleartext. Low privileged users can exploit this to create an administrator user and obtain the SMTP credentials.

How urgent is CVE-2020-11681?

Priority 45/100. High severity

Related CVEs

CVE-2020-11682 MEDIUM 6.5 MITIGATE Castel NextGen DVR v1.0.0 is vulnerable to CSRF in all state-changing request
CVE-2020-11680 MEDIUM 6.5 MITIGATE Castel NextGen DVR v1.0.0 is vulnerable to authorization bypass on all administrator functionality
CVE-2020-11679 HIGH 8.8 MITIGATE Castel NextGen DVR v1.0.0 is vulnerable to privilege escalation through the Adminstrator/Users/Edit/:UserId fu

References

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