How severe is CVE-2018-1636?

CVE-2018-1636 has a CVSS 3.x base score of 6.7, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-1636 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-1636?

CVE-2018-1636 primarily affects Ibm Informix Dynamic Server. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-1636?

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

When was CVE-2018-1636 published?

CVE-2018-1636 was published on 2019-08-20 and last updated on 2026-06-17.

CVE-2018-1636

CVE-2018-1636 is a medium-severity vulnerability in Ibm Informix Dynamic Server with a CVSS 3.x base score of 6.7. 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-787.

Key facts

Severity: Medium (CVSS 3.x base score 6.7)
CVSS v2: 7.2
EPSS exploit prediction: 0% (35th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Ibm Informix Dynamic Server
Published: 2019-08-20
Last modified: 2026-06-17

Description

Stack-based buffer overflow in oninit in IBM Informix Dynamic Server Enterprise Edition 12.1 allows an authenticated user to execute predefined code with root privileges, such as escalating to a root shell. IBM X-Force ID: 144441.

Frequently asked questions

What is CVE-2018-1636?: Stack-based buffer overflow in oninit in IBM Informix Dynamic Server Enterprise Edition 12.1 allows an authenticated user to execute predefined code with root privileges, such as escalating to a root shell. IBM X-Force ID: 144441.
How severe is CVE-2018-1636?: CVE-2018-1636 has a CVSS 3.x base score of 6.7, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-1636 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-1636?: CVE-2018-1636 primarily affects Ibm Informix Dynamic Server. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-1636?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-1636 published?: CVE-2018-1636 was published on 2019-08-20 and last updated on 2026-06-17.

References

Affected products (12)

cpe:2.3:a:ibm:informix_dynamic_server:12.10:fc1:*:*:enterprise:*:*:*
cpe:2.3:a:ibm:informix_dynamic_server:12.10:fc10:*:*:enterprise:*:*:*
cpe:2.3:a:ibm:informix_dynamic_server:12.10:fc11:*:*:enterprise:*:*:*
cpe:2.3:a:ibm:informix_dynamic_server:12.10:fc12:*:*:enterprise:*:*:*
cpe:2.3:a:ibm:informix_dynamic_server:12.10:fc2:*:*:enterprise:*:*:*
cpe:2.3:a:ibm:informix_dynamic_server:12.10:fc3:*:*:enterprise:*:*:*
cpe:2.3:a:ibm:informix_dynamic_server:12.10:fc4:*:*:enterprise:*:*:*
cpe:2.3:a:ibm:informix_dynamic_server:12.10:fc5:*:*:enterprise:*:*:*
cpe:2.3:a:ibm:informix_dynamic_server:12.10:fc6:*:*:enterprise:*:*:*
cpe:2.3:a:ibm:informix_dynamic_server:12.10:fc7:*:*:enterprise:*:*:*
cpe:2.3:a:ibm:informix_dynamic_server:12.10:fc8:*:*:enterprise:*:*:*
cpe:2.3:a:ibm:informix_dynamic_server:12.10:fc9:*:*:enterprise:*:*:*

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