CVE-2019-3423: permission and access control vulnerability, which exists in V2.1.14 and below versions of C520V21 smart camer

Q: How do I fix CVE-2019-3423?

c520v21 firmware: upgrade to newer than 2.1.14. Exact commands for each OS are on this page.

Q: Is CVE-2019-3423 being exploited?

CVE-2019-3423 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2019-3423 affect?

CVE-2019-3423 affects c520v21 firmware. Severity is medium (CVSS 5.3). permission and access control vulnerability, which exists in V2.1.14 and below versions of C520V21 smart camera devices. An attacker can construct a URL for directory traversal and access to other unauthorized files or resources.

Q: How urgent is CVE-2019-3423?

Priority 41/100. Remotely exploitable, no login, no user action

This month

MEDIUM 5.3REMOTEUPGRADE

CVE-2019-3423 is a medium-severity flaw (CVSS 5.3) affecting c520v21 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

permission and access control vulnerability, which exists in V2.1.14 and below versions of C520V21 smart camera devices. An attacker can construct a URL for directory traversal and access to other unauthorized files or resources.

Why this priority

Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.3% (top 30%)
CISA exploited list	No
Weakness	CWE-22
Published	2019-11-18
Last modified	2026-06-17

Publisher (CNA): ZTE Corporation · Vendor: ztehome

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

Am I affected?

Timeline

2019-11-18 19:15 UTCPublished CVE record published
2026-06-17 02:35 UTCUpdated Record last modified

ztehome c520v21 firmware UPGRADE

Affected: <= 2.1.14

Fixed in: newer than 2.1.14

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-2019-3423?

c520v21 firmware: upgrade to newer than 2.1.14. Exact commands for each OS are on this page.

Is CVE-2019-3423 being exploited?

CVE-2019-3423 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-2019-3423 affect?

CVE-2019-3423 affects c520v21 firmware. Severity is medium (CVSS 5.3). permission and access control vulnerability, which exists in V2.1.14 and below versions of C520V21 smart camera devices. An attacker can construct a URL for directory traversal and access to other unauthorized files or resources.

How urgent is CVE-2019-3423?

Priority 41/100. Remotely exploitable, no login, no user action

Related CVEs

CVE-2019-3424 HIGH 8.2 UPGRADE authentication issues vulnerability, which exists in V2.1.14 and below versions of C520V21 smart camera device

References

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