How severe is CVE-2021-39049?

CVE-2021-39049 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-39049 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-39049?

CVE-2021-39049 affects Ibm I2 Analysts Notebook. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-39049?

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

When was CVE-2021-39049 published?

CVE-2021-39049 was published on 2021-12-13 and last updated on 2026-06-17.

CVE-2021-39049

CVE-2021-39049 is a high-severity vulnerability in Ibm I2 Analysts Notebook with a CVSS 3.x base score of 7.8. 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-787.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 4.6
EPSS exploit prediction: 0% (22nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Ibm I2 Analysts Notebook
Published: 2021-12-13
Last modified: 2026-06-17

Description

IBM i2 Analyst's Notebook 9.2.0, 9.2.1, and 9.2.2 is vulnerable to a stack-based buffer overflow, caused by improper bounds checking. A local attacker could overflow a buffer and gain lower level privileges. IBM X-Force ID: 214439.

Frequently asked questions

What is CVE-2021-39049?: IBM i2 Analyst's Notebook 9.2.0, 9.2.1, and 9.2.2 is vulnerable to a stack-based buffer overflow, caused by improper bounds checking. A local attacker could overflow a buffer and gain lower level privileges. IBM X-Force ID: 214439.
How severe is CVE-2021-39049?: CVE-2021-39049 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-39049 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-39049?: CVE-2021-39049 affects Ibm I2 Analysts Notebook. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-39049?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-39049 published?: CVE-2021-39049 was published on 2021-12-13 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:ibm:i2_analysts_notebook:*:*:*:*:*:*:*:*

More vulnerabilities in Ibm I2 Analysts Notebook

CVE-2021-39050 — High (CVSS 7.8): IBM i2 Analyst's Notebook 9.2.0, 9.2.1, and 9.2.2 is vulnerable to a stack-based buffer overflow, caused by improper…
CVE-2020-4724 — High (CVSS 7.8): IBM i2 Analyst Notebook 9.2.0 and 9.2.1 could allow a local attacker to execute arbitrary code on the system, caused by…
CVE-2020-4723 — High (CVSS 7.8): IBM i2 Analyst Notebook 9.2.0 and 9.2.1 could allow a local attacker to execute arbitrary code on the system, caused by…
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CVE-2020-4721 — High (CVSS 7.8): IBM i2 Analyst Notebook 9.2.0 and 9.2.1 could allow a local attacker to execute arbitrary code on the system, caused by…
CVE-2020-4554 — High (CVSS 7.8): IBM i2 Analyst Notebook 9.2.1 and 9.2.2 could allow a local attacker to execute arbitrary code on the system, caused by…

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