CVE-2026-70331 Microsoft Edge for iOS Spoofing Vulnerability

What is CVE-2026-70331?

CVE-2026-70331 is a medium-severity vulnerability in Microsoft Edge, published on 28 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

Improper neutralization of input used for llm prompting in Microsoft Edge for iOS allows an unauthorized attacker to perform spoofing over a network.

Weakness: CWE-1427

Which versions are affected by CVE-2026-70331?

It affects 2 products.

Products include Microsoft Edge, Microsoft Edge Chromium.

How do I fix CVE-2026-70331?

No fix has been published for CVE-2026-70331 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-70331 being exploited?

There is no known exploitation of CVE-2026-70331 in the wild and no public exploit code.

Other vulnerabilities in Microsoft Edge

• CVE-2021-26411 Microsoft Internet Explorer Memory Corruption Exploited High 8.8
• CVE-2016-7200 Microsoft Edge Memory Corruption Exploited High 8.8
• CVE-2016-7201 Microsoft Edge Memory Corruption Exploited High 8.8
• CVE-2017-0037 Microsoft Edge and Internet Explorer Type Confusion Exploited High 8.1
• CVE-2016-3351 Microsoft Internet Explorer and Edge Information Disclosure Exploited Medium 6.5

All Microsoft Edge vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-wjm5-2899-cw52.