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PatchSiren cyber security CVE debrief

CVE-2017-3881 Cisco CVE debrief

CVE-2017-3881 is identified in the supplied official records as a remote code execution vulnerability affecting Cisco IOS and IOS XE. CISA has listed it in the Known Exploited Vulnerabilities catalog, which makes it a high-priority remediation item for any organization running the affected Cisco platform family. The supplied metadata directs defenders to apply vendor updates per Cisco instructions, with a KEV remediation due date of 2022-04-15.

Vendor
Cisco
Product
IOS and IOS XE
CVSS
CRITICAL 9.8
CISA KEV
Listed
Original CVE published
2022-03-25
Original CVE updated
2022-03-25
Advisory published
2022-03-25
Advisory updated
2022-03-25

Who should care

Organizations operating Cisco IOS or Cisco IOS XE devices should treat this as a priority, especially asset owners, network operations teams, and vulnerability management programs responsible for remediation tracking.

Technical summary

The supplied corpus identifies CVE-2017-3881 as a Cisco IOS and IOS XE remote code execution vulnerability. CISA's KEV entry marks it as known exploited and references vendor-directed updates as the required action. No additional technical specifics, affected versions, or CVSS score were provided in the supplied source set.

Defensive priority

Urgent

Recommended defensive actions

  • Identify all Cisco IOS and IOS XE assets in your environment and confirm ownership for remediation.
  • Apply Cisco vendor updates per the guidance referenced by CISA's KEV entry.
  • Track remediation against the KEV due date of 2022-04-15 and escalate any overdue systems.
  • Verify that patching or upgrade plans account for maintenance windows and rollback needs.
  • Monitor official Cisco and CISA sources for any follow-up guidance tied to this CVE.

Evidence notes

Evidence in this debrief is limited to the supplied CISA KEV metadata and the official CVE.org and NVD record links. The corpus does not include Cisco advisory text, affected version ranges, exploit mechanics, or a CVSS score, so those details are intentionally omitted.

Sources and references

Verified primary and authoritative sources

  • CVE-2017-3881 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2017-3881

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

  • CVE-2017-3881 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2017-3881

    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.