Is CVE-2021-3326 in the CISA KEV catalog?

No. CVE-2021-3326 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-3326?

CVE-2021-3326 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2021-3326?

CVE-2021-3326 has an EPSS score of 3.09% (86th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-3326?

Upgrade glibc on debian 11 to 2.31-10 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2021-3326

HIGHEPSS 86th pctl

7.5

CVSS v3

NVD

Description

The iconv function in the GNU C Library (aka glibc or libc6) 2.32 and earlier, when processing invalid input sequences in the ISO-2022-JP-3 encoding, fails an assertion in the code path and aborts the program, potentially resulting in a denial of service.

CWE-617

How to fix

Remediation Available

glibcDebian

Fixed in:2.31-10CVE-2021-3326

glibcUbuntu

Fixed in:2.23-0ubuntu11.3+esm2USN-5699-1

Fixed in:2.27-3ubuntu1.5USN-5310-1

Fixed in:2.31-0ubuntu9.7USN-5310-1

libc6Ubuntu

Fixed in:2.23-0ubuntu11.3+esm2USN-5699-1

Fixed in:2.27-3ubuntu1.5USN-5310-1

Fixed in:2.31-0ubuntu9.7USN-5310-1

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

3.09%probability of exploitation in 30 days

86thpercentile

Elevated risk: more likely to be exploited than 86% of all known CVEs.

References

Patch1

oracle.com

Third-Party Advisory5

Other references2

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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 2025-06-09.