How severe is CVE-2019-10053?

CVE-2019-10053 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-2019-10053 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-10053?

CVE-2019-10053 affects Suricata-ids Suricata. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-10053?

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-2019-10053 published?

CVE-2019-10053 was published on 2019-05-13 and last updated on 2026-06-17.

CVE-2019-10053

CVE-2019-10053 is a critical-severity vulnerability in Suricata-ids Suricata 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% (75th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-125
Affected product: Suricata-ids Suricata
Published: 2019-05-13
Last modified: 2026-06-17

Description

An issue was discovered in Suricata 4.1.x before 4.1.4. If the input of the function SSHParseBanner is composed only of a \n character, then the program runs into a heap-based buffer over-read. This occurs because the erroneous search for \r results in an integer underflow.

Frequently asked questions

What is CVE-2019-10053?: An issue was discovered in Suricata 4.1.x before 4.1.4. If the input of the function SSHParseBanner is composed only of a \n character, then the program runs into a heap-based buffer over-read. This occurs because the erroneous search for \r results in an integer underflow.
How severe is CVE-2019-10053?: CVE-2019-10053 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-2019-10053 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-10053?: CVE-2019-10053 affects Suricata-ids Suricata. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-10053?: 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-2019-10053 published?: CVE-2019-10053 was published on 2019-05-13 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:suricata-ids:suricata:*:*:*:*:*:*:*:*

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