How severe is CVE-2016-10821?

CVE-2016-10821 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2016-10821 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-10821?

CVE-2016-10821 affects Cpanel. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2016-10821?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2016-10821 published?

CVE-2016-10821 was published on 2019-08-01 and last updated on 2026-06-17.

CVE-2016-10821

CVE-2016-10821 is a medium-severity vulnerability in Cpanel with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-255.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.0
EPSS exploit prediction: 1% (62nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-255
Affected product: Cpanel
Published: 2019-08-01
Last modified: 2026-06-17

Description

In cPanel before 55.9999.141, Scripts/addpop reveals a command-line password in a process list (SEC-75).

Frequently asked questions

What is CVE-2016-10821?: In cPanel before 55.9999.141, Scripts/addpop reveals a command-line password in a process list (SEC-75).
How severe is CVE-2016-10821?: CVE-2016-10821 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2016-10821 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-10821?: CVE-2016-10821 affects Cpanel. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2016-10821?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2016-10821 published?: CVE-2016-10821 was published on 2019-08-01 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:*

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