Is CVE-2021-20208 in the CISA KEV catalog?

No. CVE-2021-20208 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-20208?

CVE-2021-20208 has a CVSS v3 base score of 6.1 (MEDIUM).

What is the EPSS score for CVE-2021-20208?

CVE-2021-20208 has an EPSS score of 0.64% (46th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-20208?

Upgrade cifs-utils on debian 11 to 2:6.11-3 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2021-20208

MEDIUM

6.1

CVSS v3

NVD

Description

A flaw was found in cifs-utils in versions before 6.13. A user when mounting a krb5 CIFS file system from within a container can use Kerberos credentials of the host. The highest threat from this vulnerability is to data confidentiality and integrity.

CWE-266 CWE-269Improper Privilege Management

How to fix

Remediation Available

cifs-utilsDebian

Fixed in:2:6.11-3CVE-2021-20208

cifs-utilsUbuntu

Fixed in:2:6.0-1ubuntu2+esm1USN-7688-1

Fixed in:2:6.4-1ubuntu1.1+esm1USN-7688-1

Fixed in:2:6.8-1ubuntu1.2USN-5459-1

Fixed in:2:6.9-1ubuntu0.2USN-5459-1

Fixed in:2:6.14-1ubuntu0.1USN-5459-1

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 VectorLocal

Attack ComplexityHigh

Privileges RequiredLow

User InteractionRequired

ScopeChanged

Impact

ConfidentialityLow

IntegrityHigh

AvailabilityNone

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

Exploit Intelligence

0.64%probability of exploitation in 30 days

46thpercentile

Moderate risk: more likely to be exploited than 46% of all known CVEs.

References

Patch1

bugzilla.samba.org

Third-Party Advisory1

bugzilla.redhat.com

Other references3

Related Vulnerabilities

Other CWE-266 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-28000	Critical	9.8	68%	-	Fix
CVE-2025-27007	Critical	9.8	51%	-	-
CVE-2025-47539	Critical	9.8	31%	-	Fix
CVE-2022-20759	High	8.8	28%	-	Fix
CVE-2024-13106	Medium	5.3	27%	-	-
CVE-2024-3013	Medium	6.3	23%	-	-

Embed a live status badge for CVE-2021-20208

Markdown

[![CVE-2021-20208](https://tridentstack.com/cve/badge/CVE-2021-20208.svg)](https://tridentstack.com/cve/CVE-2021-20208)

HTML

<a href="https://tridentstack.com/cve/CVE-2021-20208"><img src="https://tridentstack.com/cve/badge/CVE-2021-20208.svg" alt="CVE-2021-20208"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

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.