CVE-2018-18913

Name: CVE-2018-18913
Creator: NVD / NIST
Published: 2019-03-21T22:29:00.237+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.40%

Last modified Jun 17, 2026

CVE-2018-18913 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. Opera before 57.0.3098.106 is vulnerable to a DLL Search Order hijacking attack where an attacker can send a ZIP archive composed of an HTML page along with a malicious DLL to the target. Once the document is opened, it may allow the attacker to take full control of the system from any location within the system. EPSS estimates a 0.40% chance of exploitation in the next 30 days.

Description

Opera before 57.0.3098.106 is vulnerable to a DLL Search Order hijacking attack where an attacker can send a ZIP archive composed of an HTML page along with a malicious DLL to the target. Once the document is opened, it may allow the attacker to take full control of the system from any location within the system. The issue lies in the loading of the shcore.dll and dcomp.dll files: these files are being searched for by the program in the same system-wide directory where the HTML file is executed.

Metrics

CVSS 3.1

7.8/10

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

EPSS Probability

0.40%

31.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-426

Affected Software

Vendor	Product	Versions
Opera	Opera Browser	< 57.0.3098.106

References

https://blogs.opera.com/desktop/changelog-for-57/Vendor Advisory
https://lucideustech.blogspot.com/2019/02/opera-search-order-hijacking-cve-2018-18913.htmlThird Party Advisory
https://blogs.opera.com/desktop/changelog-for-57/Vendor Advisory
https://lucideustech.blogspot.com/2019/02/opera-search-order-hijacking-cve-2018-18913.htmlThird Party Advisory

Timeline

Published: Mar 21, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-18913?

How severe is CVE-2018-18913?

CVE-2018-18913 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.40% probability of exploitation in the next 30 days.

How do I fix CVE-2018-18913?

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-2018-18913?

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

Scan your code now

Source: NVD / NIST