Security readout for executives and security teams
This Cisco IOS XE flaw can crash routers or destabilize routing when BGP EVPN is enabled. The attacker must already be a BGP peer, but successful exploitation can disrupt network availability. CISA lists it in KEV, so treat exposed EVPN routers as urgent. Exposure is limited to Cisco IOS XE releases before 16.3 that support and are configured for BGP EVPN. Devices without EVPN configuration are not vulnerable, according to the source bundle. Prioritize this above ordinary medium-severity backlog items because CISA KEV marks it as known exploited and the impact is network availability. The practical scope is narrower: only IOS XE EVPN deployments before 16.3 are in scope. Mitigation focus: Upgrade affected IOS XE EVPN devices to release 16.3 or a Cisco-listed fixed release.; Disable EVPN on devices where it is not operationally required.; Review Cisco advisory guidance before changing routing infrastructure..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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Open ATT&CK lookupCVE-2017-12319 mapping review
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Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.9 (3.1)
- Known Exploited
- Yes
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CISA KEV status
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H2.23.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.9MediumVector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171103-bgpCVE reference · x_refsource_CONFIRM
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-12319CVE reference · government-resource
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Input Validation
Improper Input Validation represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.