How severe is CVE-2017-16820?

CVE-2017-16820 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-2017-16820 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-16820?

CVE-2017-16820 affects Collectd. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-16820?

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-2017-16820 published?

CVE-2017-16820 was published on 2017-11-14 and last updated on 2026-06-17.

CVE-2017-16820

CVE-2017-16820 is a critical-severity vulnerability in Collectd 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-415.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 10.0
EPSS exploit prediction: 4% (89th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-415
Affected product: Collectd
Published: 2017-11-14
Last modified: 2026-06-17

Description

The csnmp_read_table function in snmp.c in the SNMP plugin in collectd before 5.6.3 is susceptible to a double free in a certain error case, which could lead to a crash (or potentially have other impact).

Frequently asked questions

What is CVE-2017-16820?: The csnmp_read_table function in snmp.c in the SNMP plugin in collectd before 5.6.3 is susceptible to a double free in a certain error case, which could lead to a crash (or potentially have other impact).
How severe is CVE-2017-16820?: CVE-2017-16820 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-2017-16820 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-16820?: CVE-2017-16820 affects Collectd. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-16820?: 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-2017-16820 published?: CVE-2017-16820 was published on 2017-11-14 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:collectd:collectd:*:*:*:*:*:*:*:*

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