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PatchSiren cyber security CVE debrief

CVE-2017-16651 Roundcube CVE debrief

CVE-2017-16651 is a Roundcube Webmail file disclosure vulnerability that CISA has listed in the Known Exploited Vulnerabilities catalog. That KEV designation means it should be treated as actively relevant for defense and remediation planning, even though the supplied official sources do not provide deeper technical details here.

Vendor
Roundcube
Product
Roundcube Webmail
CVSS
Unknown
CISA KEV
Listed
Original CVE published
2021-11-03
Original CVE updated
2021-11-03
Advisory published
2021-11-03
Advisory updated
2021-11-03

Who should care

Organizations running Roundcube Webmail, especially internet-facing deployments, plus mailbox administrators, vulnerability management teams, and incident responders responsible for webmail exposure.

Technical summary

The official records supplied identify CVE-2017-16651 as a file disclosure vulnerability in Roundcube Webmail. CISA’s KEV catalog marks it as known exploited and directs defenders to apply updates per vendor instructions. No additional exploit mechanics are included in the provided source corpus.

Defensive priority

High. CISA KEV inclusion is a strong signal to prioritize remediation, validate exposure, and confirm the vulnerable Roundcube Webmail instances are updated according to vendor guidance.

Recommended defensive actions

  • Identify all Roundcube Webmail deployments, including externally reachable instances.
  • Check whether any instance is running a version addressed by vendor updates for CVE-2017-16651.
  • Apply vendor-recommended updates as directed in the KEV entry.
  • Review access logs and related telemetry for suspicious file-access or disclosure activity around Roundcube systems.
  • If immediate patching is not possible, reduce exposure by restricting access to the webmail service until remediation is complete.

Evidence notes

This debrief is based only on the supplied official sources: the CISA KEV catalog entry, the CVE record, and the NVD detail page referenced by the source corpus. The corpus provides the vulnerability type, product, and KEV status, but not a full technical write-up or CVSS score.

Sources and references

Verified primary and authoritative sources

  • CVE-2017-16651 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2017-16651

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2017-16651 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2017-16651

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

  • CISA Known Exploited Vulnerabilities catalog

    Publisher, destination, and source semantics verified

    URL: https://www.cisa.gov/known-exploited-vulnerabilities-catalog

    Cybersecurity and Infrastructure Security Agency - Official CISA catalog of vulnerabilities known to be exploited in the wild.

Supplemental references

  • Source item URL

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json

    cisa_kev

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.