How severe is CVE-2020-11799?

CVE-2020-11799 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-11799 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-11799?

CVE-2020-11799 affects Z-cron. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-11799?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2020-11799 published?

CVE-2020-11799 was published on 2020-04-15 and last updated on 2026-06-17.

CVE-2020-11799

CVE-2020-11799 is a critical-severity vulnerability in Z-cron with a CVSS 3.x base score of 9.8. 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-269.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 1% (64th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-269
Affected product: Z-cron
Published: 2020-04-15
Last modified: 2026-06-17

Description

Z-Cron 5.6 Build 04 allows an unprivileged attacker to elevate privileges by modifying a privileged user's task. This can also affect all users who are signed in on the system if a shell is placed in a location that other unprivileged users have access to.

Frequently asked questions

What is CVE-2020-11799?: Z-Cron 5.6 Build 04 allows an unprivileged attacker to elevate privileges by modifying a privileged user's task. This can also affect all users who are signed in on the system if a shell is placed in a location that other unprivileged users have access to.
How severe is CVE-2020-11799?: CVE-2020-11799 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-11799 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-11799?: CVE-2020-11799 affects Z-cron. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-11799?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2020-11799 published?: CVE-2020-11799 was published on 2020-04-15 and last updated on 2026-06-17.

References

https://blog.spookysec.net/zcron/

Affected products (1)

cpe:2.3:a:z-cron:z-cron:5.6:build_04:*:*:*:*:*:*

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