by Kastro
Paper/Archive/CVE-2026-70242

CVE-2026-70242

Microsoft Microsoft 365 Apps for Enterprise — Microsoft Office Outlook Remote Code Execution Vulnerability

EPSS 2%CVSS 9.8
critical.is priorityof 100
45
CVSS 9.8 (CNA)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 75.3.753 × 2015.1No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

Heap-based buffer overflow in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.

Affected

ProductAffectedFixed inSource
Microsoft 365 Apps for Enterprise16.0.1 – < https://aka.ms/OfficeSecurityReleaseshttps://aka.ms/OfficeSecurityReleasesCNA
Microsoft Office LTSC 202116.0.1 – < 16.0.14334.2097416.0.14334.20974CNA
Microsoft Office LTSC 202416.0.0 – < 16.0.17932.2105616.0.17932.21056CNA

Scores by source

microsoft (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

patchmsrc.microsoft.com/update-guide/vulnerability/CVE-2026-70242