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Vulnerabilities

Vulnerability · CVE-2017-17762

episerver episerver Improper Restriction of XML External Entity Reference

Published Jan 14, 2026 · catalog updated Jan 14, 2026 · episerver episerver Improper Restriction

Patch now

CVE-2017-17762 is in the CISA known-exploited catalog. Confirm episerver episerver Improper Restriction against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (episerver episerver Improper Restriction).
  • No version range is stored. A customer cannot check an installed version against this record.
Severity
Unknown—
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
4.65%
Remediation
Remediation guidance
Affected products
vendor episerver episerver

XML external entity (XXE) vulnerability in Episerver 7 patch 4 and earlier allows remote attackers to read arbitrary files via a crafted DTD in an XML request involving util/xmlrpc/Handler.ashx.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor episerver episerverversion unspecified

How to fix CVE-2017-17762

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2017-17762 is in the CISA known-exploited catalog. Confirm episerver episerver Improper Restriction against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Affected version ranges are not on this record. Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

What should an analyst verify?

No weakness class is stored. EPSS 4.65%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Jan 14, 2026 · VulnCheck KEV

    Detected

    XML external entity (XXE) vulnerability in Episerver 7 patch 4 and earlier allows remote attackers to read arbitrary files via a crafted DTD in an XML request involving util/xmlrpc/Handler.ashx.

  2. Jan 14, 2026 · CISA KEV

    Known exploited

    Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

Sources

  • CVE.orgVulnerability recordCVE-2017-17762

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2017-17762

    30-day exploitation probability 4.6%

    first.org
  • VulnCheck KEVConfirmed exploitationCVE-2017-17762

    XML external entity (XXE) vulnerability in Episerver 7 patch 4 and earlier allows remote attackers to read arbitrary files via a crafted DTD in an XML request involving util/xmlrpc/Handler.ashx.

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.