Is CVE-2021-3828 in the CISA KEV catalog?

No. CVE-2021-3828 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-3828?

CVE-2021-3828 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2021-3828?

CVE-2021-3828 has an EPSS score of 1.65% (74th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-3828?

Upgrade nltk on debian 12 to 3.6.5-1 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2021-3828

HIGHEPSS 74th pctl

7.5

CVSS v3

NVD

Description

nltk is vulnerable to Inefficient Regular Expression Complexity

CWE-1333 CWE-697

How to fix

Remediation Available

nltkDebian

Fixed in:3.6.5-1CVE-2021-3828

nltkUbuntu

Fixed in:3.1-1ubuntu0.1+esm1USN-5215-1

Fixed in:3.2.5-1ubuntu0.1+esm1USN-5215-1

Fixed in:3.4.5-2ubuntu0.1~esm1USN-5215-1

python-nltkUbuntu

Fixed in:3.1-1ubuntu0.1+esm1USN-5215-1

Fixed in:3.2.5-1ubuntu0.1+esm1USN-5215-1

python3-nltkUbuntu

Fixed in:3.1-1ubuntu0.1+esm1USN-5215-1

Fixed in:3.2.5-1ubuntu0.1+esm1USN-5215-1

Fixed in:3.4.5-2ubuntu0.1~esm1USN-5215-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploit Intelligence

1.65%probability of exploitation in 30 days

74thpercentile

Elevated risk: more likely to be exploited than 74% of all known CVEs.

References

Patch2

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.