CVE-2016-1546

Name: CVE-2016-1546
Creator: NVD / NIST
Published: 2016-07-06T14:59:01.503+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 15.33%

Last modified Jun 17, 2026

CVE-2016-1546 is a vulnerability of currently unknown severity. The Apache HTTP Server 2.4.17 and 2.4.18, when mod_http2 is enabled, does not limit the number of simultaneous stream workers for a single HTTP/2 connection, which allows remote attackers to cause a denial of service (stream-processing outage) via modified flow-control windows.. EPSS estimates a 15.33% chance of exploitation in the next 30 days.

Description

The Apache HTTP Server 2.4.17 and 2.4.18, when mod_http2 is enabled, does not limit the number of simultaneous stream workers for a single HTTP/2 connection, which allows remote attackers to cause a denial of service (stream-processing outage) via modified flow-control windows.

Metrics

EPSS Probability

15.33%

96.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-399

Affected Software

Vendor	Product	Versions
Apache	Http Server	2.4.17
Apache	Http Server	2.4.18

References

Timeline

Published: Jul 6, 2016
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2016-1546?

How severe is CVE-2016-1546?

Severity scoring for CVE-2016-1546 is pending analysis. The EPSS model estimates a 15.33% probability of exploitation in the next 30 days.

How do I fix CVE-2016-1546?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2016-1546?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST