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CVE-2017-6632

20
FAUCET Score

CVE-2017-6632 describes a denial-of-service vulnerability in Cisco FirePOWER System Software versions 5.3.0 through 6.2.2, specifically when configured to log connections via SSL policy default actions. An unauthenticated, remote attacker can exploit this by sending a flood of crafted TCP packets, leading to high system resource consumption and a DoS condition. Rated 7.5 High (CVSSv3), the attack requires low complexity and no user interaction, impacting availability. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
5.3.0CPE matchmatch criteria
cpe:2.3:a:cisco:firepower_threat_defense:5.3.0:*:*:*:*:*:*:*
5.4.0CPE matchmatch criteria
cpe:2.3:a:cisco:firepower_threat_defense:5.4.0:*:*:*:*:*:*:*
6.0.0CPE matchmatch criteria
cpe:2.3:a:cisco:firepower_threat_defense:6.0.0:*:*:*:*:*:*:*
6.0.1CPE matchmatch criteria
cpe:2.3:a:cisco:firepower_threat_defense:6.0.1:*:*:*:*:*:*:*
6.0.1.3CPE matchmatch criteria
cpe:2.3:a:cisco:firepower_threat_defense:6.0.1.3:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.39%
Probability of exploitation in next 30 days
EPSS Percentile
82.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0239 is in the 68th percentile among its peer group of 51,506 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

ciscovendor investigatingvia nvd_reference
View patch

References

tools.cisco.com / security/center/content/CiscoSecurityAdvisory/cisco-sa-20170517-fpwr
Vendor Advisory
securityfocus.com / bid/98523
Third Party AdvisoryVDB Entry