CVE-2017-6678

highpriority · track · 31EPSS 0.017 · 78 %ileEUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

1.74% (78th) EPSS

CVSS 7.8 · high

Is it mine?

7 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · nvd

EPSS · scored 2026-10-27

A vulnerability in the ingress UDP packet processing functionality of Cisco Virtualized Packet Core-Distributed Instance (VPC-DI) Software 19.2 through 21.0 could allow an unauthenticated, remote attacker to cause both control function (CF) instances on an affected system to reload, resulting in a denial of service (DoS) condition. The vulnerability is due to insufficient handling of user-supplied data by the affected software. An attacker could exploit this vulnerability by sending crafted UDP packets to the distributed instance (DI) network addresses of both CF instances on an affected system. A successful exploit could allow the attacker to cause an unhandled error condition on the affected system, which would cause the CF instances to reload and consequently cause the entire VPC to reload, resulting in the disconnection of all subscribers and a DoS condition on the affected system. This vulnerability can be exploited via IPv4 traffic only. Cisco Bug IDs: CSCvc01665 CSCvc35565.

cvss

Technical severity, 0–10. One row per scoring source.

7.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.9–7.8

v2.07.8highAV:N/AC:L/Au:N/C:N/I:N/A:Cprimary · NVD / NIST USexploitability 10 · impact 6.9

v3.07.5highCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.06.9mediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-755USprimaryCWE-399US

affected products (7)

Products and version ranges known to be affected.

n/a Cisco Virtualized Packet Core-Distributed Instance≤ Cisco Virtualized Packet Core-Distributed Instanceenisa_euvdEU
cisco virtualized packet core= v19.2_basenvdUScpe:2.3:a:cisco:virtualized_packet_core:*:*:*:*:*:*:*:*
cisco virtualized packet core= v19.3_basenvdUScpe:2.3:a:cisco:virtualized_packet_core:*:*:*:*:*:*:*:*
cisco virtualized packet core= v20.0_basenvdUScpe:2.3:a:cisco:virtualized_packet_core:*:*:*:*:*:*:*:*
cisco virtualized packet core= v20.1_basenvdUScpe:2.3:a:cisco:virtualized_packet_core:*:*:*:*:*:*:*:*
cisco virtualized packet core= v20.2_basenvdUScpe:2.3:a:cisco:virtualized_packet_core:*:*:*:*:*:*:*:*
cisco virtualized packet core= v21.0_basenvdUScpe:2.3:a:cisco:virtualized_packet_core:*:*:*:*:*:*:*:*

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd NVD CVE.org MITRE

published 2017-06-26modified 2026-06-17

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+702 more

references (6)

External citations — patches, advisories, analysis.

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