How severe is CVE-2017-8390?

CVE-2017-8390 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2017-8390 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-8390?

CVE-2017-8390 primarily affects Paloaltonetworks Pan-os. In total, 31 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2017-8390?

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

When was CVE-2017-8390 published?

CVE-2017-8390 was published on 2017-08-02 and last updated on 2026-06-17.

CVE-2017-8390

CVE-2017-8390 is a critical-severity vulnerability in Paloaltonetworks Pan-os with a CVSS 3.x base score of 9.8. 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-20.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 10.0
EPSS exploit prediction: 6% (93rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Paloaltonetworks Pan-os
Published: 2017-08-02
Last modified: 2026-06-17

Description

The DNS Proxy in Palo Alto Networks PAN-OS before 6.1.18, 7.x before 7.0.16, 7.1.x before 7.1.11, and 8.x before 8.0.3 allows remote attackers to execute arbitrary code via a crafted domain name.

Frequently asked questions

What is CVE-2017-8390?: The DNS Proxy in Palo Alto Networks PAN-OS before 6.1.18, 7.x before 7.0.16, 7.1.x before 7.1.11, and 8.x before 8.0.3 allows remote attackers to execute arbitrary code via a crafted domain name.
How severe is CVE-2017-8390?: CVE-2017-8390 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2017-8390 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-8390?: CVE-2017-8390 primarily affects Paloaltonetworks Pan-os. In total, 31 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2017-8390?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2017-8390 published?: CVE-2017-8390 was published on 2017-08-02 and last updated on 2026-06-17.

References

Affected products (31)

cpe:2.3:o:paloaltonetworks:pan-os:*:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:7.0.1:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:7.0.2:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:7.0.3:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:7.0.4:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:7.0.5:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:7.0.6:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:7.0.7:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:7.0.8:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:7.0.9:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:7.0.10:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:7.0.11:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:7.0.12:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:7.0.13:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:7.0.14:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:7.0.15:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:7.1.0:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:7.1.1:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:7.1.2:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:7.1.3:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:7.1.4:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:7.1.4-h2:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:7.1.6:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:7.1.7:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:7.1.8:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:7.1.9:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:7.1.9-h2:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:7.1.10:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:8.0.0:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:8.0.1:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:8.0.2:*:*:*:*:*:*:*

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