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CVE-2019-1833

21
FAUCET Score

CVE-2019-1833 describes a medium-severity vulnerability in Cisco Firepower Threat Defense (FTD) Software's SSL/TLS protocol parser. This flaw, caused by improper parsing of TLS packet header attributes, allows an unauthenticated, remote attacker to bypass configured security policies. A successful exploit could enable uninspected traffic to flow through the system. While no public exploit code or active exploitation has been observed, and community discussion is minimal, organizations using affected Cisco Secure Firewall Management Center products should be aware of this potential policy bypass.

Impacted Technologies

VendorProductVersion(s)CPE
6.1.0CPE matchmatch criteria
cpe:2.3:a:cisco:secure_firewall_management_center:6.1.0:*:*:*:*:*:*:*
6.2.0CPE matchmatch criteria
cpe:2.3:a:cisco:secure_firewall_management_center:6.2.0:*:*:*:*:*:*:*
6.2.1CPE matchmatch criteria
cpe:2.3:a:cisco:secure_firewall_management_center:6.2.1:*:*:*:*:*:*:*
6.2.2CPE matchmatch criteria
cpe:2.3:a:cisco:secure_firewall_management_center:6.2.2:*:*:*:*:*:*:*
6.2.3CPE matchmatch criteria
cpe:2.3:a:cisco:secure_firewall_management_center:6.2.3:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.8MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.71%
Probability of exploitation in next 30 days
EPSS Percentile
75.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0171 is in the 61st percentile among its peer group of 23,705 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 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-20190515-ftd-ssltls-bypass
Vendor Advisory
securityfocus.com / bid/108338
Third Party AdvisoryVDB Entry