CVE-2019-12659

Name: CVE-2019-12659
Creator: NVD / NIST
Published: 2019-09-25T21:15:11.03+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.82%

Last modified Jun 17, 2026

CVE-2019-12659 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. A vulnerability in the HTTP server code of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause the HTTP server to crash. The vulnerability is due to a logical error in the logging mechanism. EPSS estimates a 1.82% chance of exploitation in the next 30 days.

Description

A vulnerability in the HTTP server code of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause the HTTP server to crash. The vulnerability is due to a logical error in the logging mechanism. An attacker could exploit this vulnerability by generating a high amount of long-lived connections to the HTTP service on the device. A successful exploit could allow the attacker to cause the HTTP server to crash.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

1.82%

76.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Cisco	Ios Xe	16.10.1

References

Timeline

Published: Sep 25, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-12659?

How severe is CVE-2019-12659?

CVE-2019-12659 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.82% probability of exploitation in the next 30 days.

How do I fix CVE-2019-12659?

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-2019-12659?

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

Scan your code now

Source: NVD / NIST