What’s Vulnerable › Vulnerabilities

CVE-2018-18913

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-03-21 · updated 2026-06-17
• Weakness: CWE-426

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.

Affected products

• Opera Browser: before 57.0.3098.106 — fixed in 57.0.3098.106

How to fix

Upgrade to a fixed version: Opera Browser 57.0.3098.106. Check the vendor advisory for mitigations.

References

• https://blogs.opera.com/desktop/changelog-for-57/
• https://lucideustech.blogspot.com/2019/02/opera-search-order-hijacking-cve-2018-18913.html
• https://blogs.opera.com/desktop/changelog-for-57/
• https://lucideustech.blogspot.com/2019/02/opera-search-order-hijacking-cve-2018-18913.html

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