How severe is CVE-2017-6603?

CVE-2017-6603 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2017-6603 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-6603?

CVE-2017-6603 affects Cisco Asr 900 Series Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-6603?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2017-6603 published?

CVE-2017-6603 was published on 2017-04-07 and last updated on 2026-06-17.

CVE-2017-6603

CVE-2017-6603 is a medium-severity vulnerability in Cisco Asr 900 Series Firmware with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 6.1
EPSS exploit prediction: 1% (47th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Cisco Asr 900 Series Firmware
Published: 2017-04-07
Last modified: 2026-06-17

Description

A vulnerability in Cisco ASR 903 or ASR 920 Series Devices running with an RSP2 card could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on a targeted system because of incorrect IPv6 Packet Processing. More Information: CSCuy94366. Known Affected Releases: 15.4(3)S3.15. Known Fixed Releases: 15.6(2)SP 15.6(1.31)SP.

Frequently asked questions

What is CVE-2017-6603?: A vulnerability in Cisco ASR 903 or ASR 920 Series Devices running with an RSP2 card could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on a targeted system because of incorrect IPv6 Packet Processing. More Information: CSCuy94366. Known Affected Releases: 15.4(3)S3.15. Known Fixed Releases: 15.6(2)SP 15.6(1.31)SP.
How severe is CVE-2017-6603?: CVE-2017-6603 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2017-6603 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-6603?: CVE-2017-6603 affects Cisco Asr 900 Series Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-6603?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2017-6603 published?: CVE-2017-6603 was published on 2017-04-07 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:cisco:asr_900_series_firmware:15.4\(3\)s3.15:*:*:*:*:*:*:*