Is CVE-2021-3331 in the CISA KEV catalog?

No. CVE-2021-3331 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-3331?

CVE-2021-3331 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2021-3331?

CVE-2021-3331 has an EPSS score of 7.41% (94th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-3331?

Upgrade WinSCP to 5.17.10 or later.

CVE & CISA-KEV Catalog

CVE-2021-3331

CRITICALEPSS 94th pctl

9.8

CVSS v3

NVD

Description

WinSCP before 5.17.10 allows remote attackers to execute arbitrary programs when the URL handler encounters a crafted URL that loads session settings. (For example, this is exploitable in a default installation in which WinSCP is the handler for sftp:// URLs.)

How to fix

Remediation Available

WinSCPWindows application

Affected:5.17.10Fixed in:5.17.10Martin Prikryl

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

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

7.41%probability of exploitation in 30 days

94thpercentile

High risk: more likely to be exploited than 94% of all known CVEs.

References

Patch2

Vendor Advisory2

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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.