How severe is CVE-2019-17040?

CVE-2019-17040 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-2019-17040 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-17040?

CVE-2019-17040 affects Rsyslog. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-17040?

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-2019-17040 published?

CVE-2019-17040 was published on 2019-09-30 and last updated on 2026-06-17.

CVE-2019-17040

CVE-2019-17040 is a critical-severity vulnerability in Rsyslog 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-125.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 2% (82nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-125
Affected product: Rsyslog
Published: 2019-09-30
Last modified: 2026-06-17

Description

contrib/pmdb2diag/pmdb2diag.c in Rsyslog v8.1908.0 allows out-of-bounds access because the level length is mishandled.

Frequently asked questions

What is CVE-2019-17040?: contrib/pmdb2diag/pmdb2diag.c in Rsyslog v8.1908.0 allows out-of-bounds access because the level length is mishandled.
How severe is CVE-2019-17040?: CVE-2019-17040 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-2019-17040 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-17040?: CVE-2019-17040 affects Rsyslog. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-17040?: 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-2019-17040 published?: CVE-2019-17040 was published on 2019-09-30 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:rsyslog:rsyslog:8.1908.0:*:*:*:*:*:*:*

More vulnerabilities in Rsyslog

CVE-2019-17042 — Critical (CVSS 9.8): An issue was discovered in Rsyslog v8.1908.0. contrib/pmcisconames/pmcisconames.c has a heap overflow in the parser for…
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CVE-2017-14451 — Critical (CVSS 10.0): An exploitable out-of-bounds read vulnerability exists in libevm (Ethereum Virtual Machine) of CPP-Ethereum. A…
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