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CVE-2019-15541

22
FAUCET Score

CVE-2019-15541 describes a denial-of-service vulnerability in the rustls crate before version 0.16.0, specifically impacting the rustls-mio/examples/tlsserver.rs component. An unauthenticated attacker can trigger an infinite loop by preventing a client from ever becoming writable. This vulnerability carries a CVSS score of 7.5 (High) due to its network-based attack vector, low attack complexity, and high impact on availability. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.16.0CPE matchmatch criteria
cpe:2.3:a:rustls_project:rustls:*:*:*:*:*:*:*:*

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
2.23%
Probability of exploitation in next 30 days
EPSS Percentile
80.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0223 is in the 66th percentile among its peer group of 51,466 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

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / ctz/rustls/commit/a93ee1abd2ab19ebe4bf9d684d56637ee54a6074
PatchThird Party Advisory
github.com / ctz/rustls/compare/cd66549...17ee52c
Release NotesThird Party Advisory
github.com / ctz/rustls/issues/285
ExploitIssue TrackingThird Party Advisory