CVE-2020-12830: Addressed multiple stack buffer overflow vulnerabilities that could allow an attacker to carry out escalation

Q: How do I fix CVE-2020-12830?

my cloud firmware: upgrade to 5.04.114. Exact commands for each OS are on this page.

Q: Is CVE-2020-12830 being exploited?

CVE-2020-12830 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-2020-12830 affect?

CVE-2020-12830 affects my cloud firmware. Severity is critical (CVSS 9.8). Addressed multiple stack buffer overflow vulnerabilities that could allow an attacker to carry out escalation of privileges through unauthorized remote code execution in Western Digital My Cloud devices before 5.04.114.

Q: How urgent is CVE-2020-12830?

Priority 61/100. Critical severity; Remotely exploitable, no login, no user action

This week

CRITICAL 9.8REMOTEUPGRADE

CVE-2020-12830 is a critical-severity flaw (CVSS 9.8) affecting my cloud firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Addressed multiple stack buffer overflow vulnerabilities that could allow an attacker to carry out escalation of privileges through unauthorized remote code execution in Western Digital My Cloud devices before 5.04.114.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	3.3% (top 11%)
CISA exploited list	No
Weakness	CWE-787
Published	2020-10-27
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: westerndigital

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

Am I affected?

Timeline

2020-10-27 20:15 UTCPublished CVE record published
2026-06-17 02:52 UTCUpdated Record last modified

westerndigital my cloud firmware UPGRADE

Affected: < 5.04.114

Fixed in: 5.04.114

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-2020-12830?

my cloud firmware: upgrade to 5.04.114. Exact commands for each OS are on this page.

Is CVE-2020-12830 being exploited?

CVE-2020-12830 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-2020-12830 affect?

CVE-2020-12830 affects my cloud firmware. Severity is critical (CVSS 9.8). Addressed multiple stack buffer overflow vulnerabilities that could allow an attacker to carry out escalation of privileges through unauthorized remote code execution in Western Digital My Cloud devices before 5.04.114.

How urgent is CVE-2020-12830?

Priority 61/100. Critical severity; Remotely exploitable, no login, no user action

Software pages

Western Digital vulnerabilities

Related CVEs

CVE-2020-27744 CRITICAL 9.8 UPGRADE An issue was discovered on Western Digital My Cloud NAS devices before 5.04.114
CVE-2020-27160 CRITICAL 9.8 UPGRADE Addressed remote code execution vulnerability in AvailableApps.php that allowed escalation of privileges in We
CVE-2020-27159 CRITICAL 9.8 UPGRADE Addressed remote code execution vulnerability in DsdkProxy.php due to insufficient sanitization and insufficie
CVE-2020-27158 CRITICAL 9.8 UPGRADE Addressed remote code execution vulnerability in cgi_api.php that allowed escalation of privileges in Western
CVE-2020-25765 CRITICAL 9.8 UPGRADE Addressed remote code execution vulnerability in reg_device.php due to insufficient validation of user input.i

References

← Back to latest CVEs