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CVE-2017-8390

31
FAUCET Score

CVE-2017-8390 is a critical arbitrary code execution vulnerability affecting the DNS Proxy in Palo Alto Networks PAN-OS versions before 6.1.18, 7.x before 7.0.16, 7.1.x before 7.1.11, and 8.x before 8.0.3. With a CVSS score of 9.8, this vulnerability can be exploited remotely without authentication via a crafted domain name, leading to complete compromise of confidentiality, integrity, and availability. Despite its high severity, there is no evidence of active exploitation, publicly available exploit code, or significant community discussion or media coverage at this time.

Impacted Technologies

VendorProductVersion(s)CPE
<= 6.1.17CPE matchmatch criteria
cpe:2.3:o:paloaltonetworks:pan-os:*:*:*:*:*:*:*:*
7.0.1CPE matchmatch criteria
cpe:2.3:o:paloaltonetworks:pan-os:7.0.1:*:*:*:*:*:*:*
7.0.2CPE matchmatch criteria
cpe:2.3:o:paloaltonetworks:pan-os:7.0.2:*:*:*:*:*:*:*
7.0.3CPE matchmatch criteria
cpe:2.3:o:paloaltonetworks:pan-os:7.0.3:*:*:*:*:*:*:*
7.0.4CPE matchmatch criteria
cpe:2.3:o:paloaltonetworks:pan-os:7.0.4:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
6.07%
Probability of exploitation in next 30 days
EPSS Percentile
92.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0607 is in the 87th percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

security.paloaltonetworks.com / CVE-2017-8390
securityfocus.com / bid/99911
Third Party AdvisoryVDB Entry
securitytracker.com / id/1038976
Third Party AdvisoryVDB Entry