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CVE-2021-42308
low
CVSS 3.1
Microsoft Edge (Chromium-based) Spoofing Vulnerability
Summary
Microsoft Edge (Chromium-based) Spoofing Vulnerability
AI summary snake-internal / snake-template-v1
A weakness called CVE-2021-42308 was discovered in Microsoft.
Severity is Low (CVSS 3.1/10). Real-world exploitation is unlikely but a fix is still recommended.
What you should do: update the affected software to the latest version. If unsure, ask your IT team or search the vendor's site for "Microsoft CVE-2021-42308".
CVE-2021-42308 (Microsoft). Severity: Low / CVSSv3 3.1. Category: CWE-290.
Response plan:
1. Check the vendor advisory for affected versions and the patched release.
2. If a vulnerable version is running in production, schedule maintenance (urgency from KEV/CVSS).
3. If no patch yet, mitigate via WAF rule, disabling the affected feature, etc.
4. Monitor logs / SIEM for known IOC and PoC signatures of this CVE.
PoCs and fix commits: see the 'References' section, MITRE, and NVD.
❓ What is the problem
A weakness (CVE-2021-42308) in Microsoft. A serious software flaw has been identified.
📍 Affected scope
Target versions of Microsoft (see vendor advisory). If running in production, identify exposure immediately.
🔥 Severity
Severity: Low (CVSS 3.1/10). Real-world exploitation is unlikely but a fix is still recommended.
🔧 How to fix
Update to the patched release as listed in the vendor advisory. (Typical mitigation pattern for CWE-290)
🛡️ Workaround
If a patch is not yet available, consider disabling the affected feature, applying WAF rules, blocking via network ACLs, or isolating the vulnerable version.
🔍 Detection
Check version information, scan dependencies via SBOM, and monitor SIEM for IOC and PoC signatures related to this CVE.