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CVE-2017-12319

59
FAUCET Score

CVE-2017-12319 is a critical vulnerability in Cisco IOS XE Software, specifically affecting devices configured for BGP EVPN. An unauthenticated, remote attacker can exploit a flaw in how crafted BGP packets are processed, leading to device reloads or BGP routing table corruption, resulting in a denial of service. With a CVSS score of 5.9 (Medium) and a FAUCET Risk Score of 98/100, this vulnerability is considered severe due to its network-wide impact and low attack complexity. Notably, this CVE is listed in CISA's KEV catalog, indicating active exploitation, despite no public exploit code or Metasploit/Nuclei modules being available. Community discussion is high, suggesting significant awareness and concern.

Impacted Technologies

VendorProductVersion(s)CPE
15.4\(1\)sCPE matchmatch criteria
cpe:2.3:o:cisco:ios:15.4\(1\)s:*:*:*:*:*:*:*
< 16.3CPE matchmatch criteria
cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.9MEDIUM

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.2
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
5.35%
Probability of exploitation in next 30 days
EPSS Percentile
91.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
Added to KEV · Mar 3, 2022
This CVE's current EPSS score of 0.0535 is in the 90th percentile among its peer group of 19,954 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

ciscovendor investigatingvia nvd_reference
View patch

References

cisa.gov / known-exploited-vulnerabilities-catalog
US Government Resource
tools.cisco.com / security/center/content/CiscoSecurityAdvisory/cisco-sa-20171103-bgp
Vendor Advisory
securityfocus.com / bid/101676
Broken LinkThird Party AdvisoryVDB Entry