Is CVE-2017-0055 in the CISA KEV catalog?

No. CVE-2017-0055 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2017-0055?

CVE-2017-0055 has a CVSS v3 base score of 6.1 (MEDIUM).

What is the EPSS score for CVE-2017-0055?

CVE-2017-0055 has an EPSS score of 16.37% (97th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2017-0055

MEDIUMEPSS 97th pctl

6.1

CVSS v3

NVD

Description

Microsoft Internet Information Server (IIS) in Windows Vista SP2; Windows Server 2008 SP2 and R2; Windows 7 SP1; Windows 8.1; Windows Server 2012 Gold and R2; Windows RT 8.1; Windows 10 Gold, 1511, and 1607; and Windows Server 2016 allows remote attackers to perform cross-site scripting and run script with local user privileges via a crafted request, aka "Microsoft IIS Server XSS Elevation of Privilege Vulnerability."

CWE-79Cross-Site Scripting (XSS)

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeChanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityNone

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

Exploit Intelligence

16.37%probability of exploitation in 30 days

97thpercentile

Very high risk: more likely to be exploited than 97% 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.