CVE-2018-1157

Name: CVE-2018-1157
Creator: NVD / NIST
Published: 2018-08-23T19:29:00.457+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 4.38%

Last modified Jun 17, 2026

CVE-2018-1157 is a vulnerability of currently unknown severity. Mikrotik RouterOS before 6.42.7 and 6.40.9 is vulnerable to a memory exhaustion vulnerability. An authenticated remote attacker can crash the HTTP server and in some circumstances reboot the system via a crafted HTTP POST request.. EPSS estimates a 4.38% chance of exploitation in the next 30 days.

Description

Mikrotik RouterOS before 6.42.7 and 6.40.9 is vulnerable to a memory exhaustion vulnerability. An authenticated remote attacker can crash the HTTP server and in some circumstances reboot the system via a crafted HTTP POST request.

Metrics

EPSS Probability

4.38%

90.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-400

Affected Software

Vendor	Product	Versions
Mikrotik	Routeros	< 6.40.9
Mikrotik	Routeros	< 6.42.7

References

http://seclists.org/fulldisclosure/2019/Jul/20
https://mikrotik.com/download/changelogsVendor Advisory
https://mikrotik.com/download/changelogs/bugfix-release-treeVendor Advisory
https://www.tenable.com/security/research/tra-2018-21Exploit, Third Party Advisory
http://seclists.org/fulldisclosure/2019/Jul/20
https://mikrotik.com/download/changelogsVendor Advisory
https://mikrotik.com/download/changelogs/bugfix-release-treeVendor Advisory
https://www.tenable.com/security/research/tra-2018-21Exploit, Third Party Advisory

Timeline

Published: Aug 23, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-1157?

How severe is CVE-2018-1157?

Severity scoring for CVE-2018-1157 is pending analysis. The EPSS model estimates a 4.38% probability of exploitation in the next 30 days.

How do I fix CVE-2018-1157?

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-2018-1157?

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

Scan your code now

Source: NVD / NIST