by Kastro
Paper/Archive/CVE-2026-70279

CVE-2026-70279

Microsoft Microsoft Exchange Server 2016 Cumulative Update 23 — Microsoft Exchange Server Spoofing Vulnerability

EPSS 1%CVSS 9.3
critical.is priorityof 100
42
CVSS 9.3 (CNA)9.3 / 10 × 3027.9Not in CISA KEV+300.0EPSS percentile 70.1.701 × 2014.0No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network.

Affected

ProductAffectedFixed inSource
Microsoft Exchange Server 2016 Cumulative Update 2315.01.0.0 – < 15.01.2507.07715.01.2507.077CNA
Microsoft Exchange Server 2019 Cumulative Update 1415.02.0.0 – < 15.02.1544.05015.02.1544.050CNA
Microsoft Exchange Server 2019 Cumulative Update 1515.02.0.0 – < 15.02.1748.05515.02.1748.055CNA
Microsoft Exchange Server Subscription Edition RTM15.02.0.0 – < 15.02.2562.05615.02.2562.056CNA

Scores by source

microsoft (CNA)9.3CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N/E:U/RL:O/RC:C
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

patchmsrc.microsoft.com/update-guide/vulnerability/CVE-2026-70279