CVE-2017-6672: n/a Cisco ASR 5000 Series Aggregation Services…

CVE-2017-6672: A vulnerability in certain filtering mechanisms of access control lists (ACLs) for Cisco ASR 5000 Series Ag...

A vulnerability in certain filtering mechanisms of access control lists (ACLs) for Cisco ASR 5000 Series Aggregation Services Routers through 21.x could allow an unauthenticated, remote attacker to bypass ACL rules that have been configured for an affected device. More Information: CSCvb99022 CSCvc16964 CSCvc37351 CSCvc54843 CSCvc63444 CSCvc77815 CSCvc88658 CSCve08955 CSCve14141 CSCve33870.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 5, 2024, 15:33 UTC (UTC+00:00)

Security readout for executives and security teams

CVE-2017-6672 is an ACL bypass issue in Cisco ASR 5000 Series Aggregation Services Routers through 21.x. A remote unauthenticated attacker could bypass configured ACL rules, weakening network access controls. The source bundle does not provide CVSS, severity, exploit evidence, or fixed-release details. Exposure is likely limited to organizations operating Cisco ASR 5000 Series Aggregation Services Routers on software through 21.x, especially where ACLs enforce traffic separation or perimeter controls. Prioritize if ASR 5000 routers protect mobile, carrier, or high-value network boundaries. The main business risk is misplaced trust in ACL controls. If the product is not deployed, practical exposure is low. Mitigation focus: Identify Cisco ASR 5000 devices and software versions in production.; Review Cisco advisory cisco-sa-20170719-asr1 for fixed releases or official workarounds.; Engage Cisco TAC if advisory details are unavailable or ambiguous..

Prepared: Jun 12, 2026, 22:05 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Jul 25, 2017, 19:00 UTC (UTC+00:00)

Official CVE source material

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.

0CVSS vectors

0Timeline events

0ADP providers

2Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170719-asr1CVE reference · x_refsource_CONFIRM

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/aCisco ASR 5000 Series Aggregation Services RoutersCisco ASR 5000 Series Aggregation Services RoutersListed

Weakness

CWE details

No CWE listed

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