How severe is CVE-2017-6672?

CVE-2017-6672 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2017-6672 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-6672?

CVE-2017-6672 primarily affects Cisco Asr 5000 Series Software. In total, 23 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2017-6672?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2017-6672 published?

CVE-2017-6672 was published on 2017-07-25 and last updated on 2026-06-17.

CVE-2017-6672

CVE-2017-6672 is a high-severity vulnerability in Cisco Asr 5000 Series Software with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-863.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 2% (76th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-863
Affected product: Cisco Asr 5000 Series Software
Published: 2017-07-25
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2017-6672?: 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.
How severe is CVE-2017-6672?: CVE-2017-6672 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2017-6672 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-6672?: CVE-2017-6672 primarily affects Cisco Asr 5000 Series Software. In total, 23 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2017-6672?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2017-6672 published?: CVE-2017-6672 was published on 2017-07-25 and last updated on 2026-06-17.

References

Affected products (23)

cpe:2.3:a:cisco:asr_5000_series_software:19.3.5:*:*:*:*:*:*:*
cpe:2.3:a:cisco:asr_5000_series_software:19.3.11:*:*:*:*:*:*:*
cpe:2.3:a:cisco:asr_5000_series_software:19.3.12:*:*:*:*:*:*:*
cpe:2.3:a:cisco:asr_5000_series_software:19.6.0:*:*:*:*:*:*:*
cpe:2.3:a:cisco:asr_5000_series_software:19.6.3:*:*:*:*:*:*:*
cpe:2.3:a:cisco:asr_5000_series_software:19.6.6:*:*:*:*:*:*:*
cpe:2.3:a:cisco:asr_5000_series_software:20.1.v5:*:*:*:*:*:*:*
cpe:2.3:a:cisco:asr_5000_series_software:20.2.4:*:*:*:*:*:*:*
cpe:2.3:a:cisco:asr_5000_series_software:20.2.12:*:*:*:*:*:*:*
cpe:2.3:a:cisco:asr_5000_series_software:20.3.0:*:*:*:*:*:*:*
cpe:2.3:a:cisco:asr_5000_series_software:20.3.1:*:*:*:*:*:*:*
cpe:2.3:a:cisco:asr_5000_series_software:21.0.v1.66638:*:*:*:*:*:*:*
cpe:2.3:a:cisco:asr_5000_series_software:21.0.v2:*:*:*:*:*:*:*
cpe:2.3:a:cisco:asr_5000_series_software:21.1.0:*:*:*:*:*:*:*
cpe:2.3:a:cisco:asr_5000_series_software:21.1.2:*:*:*:*:*:*:*
cpe:2.3:a:cisco:asr_5000_series_software:21.1.m0.65710:*:*:*:*:*:*:*
cpe:2.3:a:cisco:asr_5000_series_software:21.1.m0.65921:*:*:*:*:*:*:*
cpe:2.3:a:cisco:asr_5000_series_software:21.1.m0.65931:*:*:*:*:*:*:*
cpe:2.3:a:cisco:asr_5000_series_software:21.1.m0.65986:*:*:*:*:*:*:*
cpe:2.3:a:cisco:asr_5000_series_software:21.1.v0:*:*:*:*:*:*:*
cpe:2.3:a:cisco:asr_5000_series_software:21.2.a0.65914:*:*:*:*:*:*:*
cpe:2.3:a:cisco:asr_5000_series_software:21.2.a0.65995:*:*:*:*:*:*:*
cpe:2.3:a:cisco:asr_5000_series_software:21.3.0:*:*:*:*:*:*:*

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