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CVE-2021-27080
critical
CVSS 9.3
Azure Sphere Unsigned Code Execution Vulnerability This CVE ID is unique from CVE-2021-27074.
Summary
Azure Sphere Unsigned Code Execution Vulnerability This CVE ID is unique from CVE-2021-27074.
AI summary snake-internal / snake-template-v1
A weakness called CVE-2021-27080 was discovered in Microsoft.
Severity is Critical (CVSS 9.3/10). If exploited, attackers can fully take over the affected system.
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-2021-27080".
CVE-2021-27080 (Microsoft). Severity: Critical / CVSSv3 9.3.
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-2021-27080) 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: Critical (CVSS 9.3/10). If exploited, attackers can fully take over the affected system.
🔧 How to fix
Update to the patched release as listed in the vendor advisory.
🛡️ 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.
References
- web https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-27080
- web https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-27080
- web https://www.talosintelligence.com/vulnerability_reports/TALOS-2021-1250
- web https://nvd.nist.gov/vuln/detail/CVE-2021-27080
- web https://github.com/advisories/GHSA-rqr5-7m2q-c54f