Is CVE-2017-9473 in the CISA KEV catalog?

No. CVE-2017-9473 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2017-9473?

CVE-2017-9473 has a CVSS v3 base score of 5.5 (MEDIUM).

What is the EPSS score for CVE-2017-9473?

CVE-2017-9473 has an EPSS score of 1.19% (64th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2017-9473?

Upgrade libytnef on debian 11 to 1.9.3-1 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2017-9473

MEDIUM

5.5

CVSS v3

NVD

Description

In ytnef 1.9.2, the TNEFFillMapi function in lib/ytnef.c allows remote attackers to cause a denial of service (memory consumption) via a crafted file.

How to fix

Remediation Available

libytnefDebian

Fixed in:1.9.3-1CVE-2017-9473

libytnefUbuntu

Fixed in:1.5-6ubuntu0.2USN-3667-1

libytnef0Ubuntu

Fixed in:1.5-6ubuntu0.2USN-3667-1

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 ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Exploit Intelligence

1.19%probability of exploitation in 30 days

64thpercentile

Moderate risk: more likely to be exploited than 64% of all known CVEs.

References

Exploit1

blogs.gentoo.org

Third-Party Advisory1

usn.ubuntu.com

Other references1

lists.fedoraproject.org

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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 2026-05-13.