Is CVE-2017-7674 in the CISA KEV catalog?

No. CVE-2017-7674 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2017-7674?

CVE-2017-7674 has a CVSS v3 base score of 4.3 (MEDIUM).

What is the EPSS score for CVE-2017-7674?

CVE-2017-7674 has an EPSS score of 8.04% (94th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2017-7674?

Upgrade libtomcat7-java on ubuntu 14.04 to 7.0.52-1ubuntu0.13 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2017-7674

MEDIUMEPSS 94th pctl

4.3

CVSS v3

NVD

Description

The CORS Filter in Apache Tomcat 9.0.0.M1 to 9.0.0.M21, 8.5.0 to 8.5.15, 8.0.0.RC1 to 8.0.44 and 7.0.41 to 7.0.78 did not add an HTTP Vary header indicating that the response varies depending on Origin. This permitted client and server side cache poisoning in some circumstances.

CWE-345

How to fix

Remediation Available

libtomcat7-javaUbuntu

Fixed in:7.0.52-1ubuntu0.13USN-3519-1

libtomcat8-javaUbuntu

Fixed in:8.0.32-1ubuntu1.5USN-3519-1

tomcat7Ubuntu

Fixed in:7.0.52-1ubuntu0.13USN-3519-1

tomcat8Ubuntu

Fixed in:8.0.32-1ubuntu1.5USN-3519-1

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 InteractionRequired

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityLow

AvailabilityNone

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

Exploit Intelligence

8.04%probability of exploitation in 30 days

94thpercentile

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

References

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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.