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CVE-2019-1669

27
FAUCET Score

CVE-2019-1669 is a high-severity vulnerability in Cisco Firepower Threat Defense (FTD) Software's data acquisition component. It allows an unauthenticated, remote attacker to bypass access control policies or cause a denial of service by sending specific traffic patterns that exhaust system memory resources. This can lead to the FTD Software failing open (ceasing inspection) or failing closed (DoS), requiring manual intervention. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
6.3.0CPE matchmatch criteria
cpe:2.3:a:cisco:firepower_threat_defense:6.3.0:*:*:*:*:*:*:*
6.4.0CPE matchmatch criteria
cpe:2.3:a:cisco:firepower_threat_defense:6.4.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

8.6HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
4.0
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.25%
Probability of exploitation in next 30 days
EPSS Percentile
66.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0125 is in the 46th percentile among its peer group of 51,553 CVEs.

Social Chatter

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-20190123-firepowertds-bypass
Vendor Advisory
securityfocus.com / bid/106721
Third Party Advisory