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CVE-2019-3554

20
FAUCET Score

CVE-2019-3554 describes a denial-of-service vulnerability in Facebook's Wangle library, affecting versions prior to v2019.01.14.00. The flaw stems from an incorrect socket cast when Wangle's AcceptRoutingHandler processes TLS 1.3 connections. This medium-severity vulnerability (CVSS 5.9) can be exploited remotely with high attack complexity, leading to a denial of service. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 2019.01.14.00CPE matchmatch criteria
cpe:2.3:a:facebook:wangle:*:*:*:*:*:*:*:*
< v2019.01.14.00CPE match
cpe:2.3:a:facebook:wangle:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.9MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.2
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.05%
Probability of exploitation in next 30 days
EPSS Percentile
60.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0106 is in the 21st percentile among its peer group of 19,955 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 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

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / facebook/wangle/commit/3b17ba10a82c71e7808760e027ac6af687e06074
PatchThird Party Advisory