Linked CVE review

Deploy Microsoft Server Software security update KB5103212

Linked CVEs: 7
Confirmed exploited: 0
PoC or lab evidence: 0
Maximum CVSS: 8.8

Evidence is kept separate

Confirmed exploitation, public exploit material, EPSS probability and CVSS severity answer different questions. “No confirmation recorded” means the checked sources do not currently confirm exploitation. It is not proof that exploitation has not occurred.

7 of 7 linked CVEs shown

Confirmed exploitedCVSS above 9.0

CVE and description	Severity	Exploit reality	Forecast and access	Remediation
CVE-2026-45503 Scheduled assessment Microsoft Exchange Server Information Disclosure Vulnerability Improper authorization in Microsoft Exchange Server allows an authorized attacker to disclose information over a network.	8.1 · CVSS 3.1 · HighSource: CNA	No confirmation recordedNo CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.None recordedNo exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.	EPSS: 0.86% · 57.3th percentileForecast date: 2026-10-07NETWORK · LOW complexity · LOW privileges · NONE user interaction	Within 7 daysHigh technical severity; prioritise exposed affected systems while verifying vendor guidance.Awaiting fix. No fixed version is explicitly recorded in the structured CVE data.
CVE-2026-45504 Scheduled assessment Microsoft Exchange Server Elevation of Privilege Vulnerability Server-side request forgery (ssrf) in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.	8.8 · CVSS 3.1 · HighSource: CNA	No confirmation recordedNo CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.None recordedNo exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.	EPSS: 0.78% · 54.5th percentileForecast date: 2026-10-07NETWORK · LOW complexity · LOW privileges · NONE user interaction	Within 7 daysHigh technical severity; prioritise exposed affected systems while verifying vendor guidance.Awaiting fix. No fixed version is explicitly recorded in the structured CVE data.
CVE-2026-45583 Scheduled assessment Microsoft Exchange Server Remote Code Execution Vulnerability Improper control of generation of code ('code injection') in Microsoft Exchange Server allows an unauthorized attacker to execute code over a network.	7.5 · CVSS 3.1 · HighSource: CNA	No confirmation recordedNo CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.None recordedNo exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.	EPSS: 0.70% · 51.5th percentileForecast date: 2026-10-07NETWORK · HIGH complexity · NONE privileges · REQUIRED user interaction	Within 7 daysHigh technical severity; prioritise exposed affected systems while verifying vendor guidance.Awaiting fix. No fixed version is explicitly recorded in the structured CVE data.
CVE-2026-47631 Scheduled assessment Microsoft Exchange Server Spoofing Vulnerability 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.	8.1 · CVSS 3.1 · HighSource: CNA	No confirmation recordedNo CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.None recordedNo exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.	EPSS: 0.47% · 38.3th percentileForecast date: 2026-10-07NETWORK · LOW complexity · NONE privileges · REQUIRED user interaction	Within 7 daysHigh technical severity; prioritise exposed affected systems while verifying vendor guidance.Awaiting fix. No fixed version is explicitly recorded in the structured CVE data.
CVE-2026-45502 Scheduled assessment Microsoft Exchange Server Information Disclosure Vulnerability Server-side request forgery (ssrf) in Microsoft Exchange Server allows an authorized attacker to disclose information over a network.	5.0 · CVSS 3.1 · MediumSource: CNA	No confirmation recordedNo CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.None recordedNo exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.	EPSS: 0.64% · 49.1th percentileForecast date: 2026-10-07NETWORK · LOW complexity · LOW privileges · NONE user interaction	ScheduledMedium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.Awaiting fix. No fixed version is explicitly recorded in the structured CVE data.
CVE-2026-45501 Scheduled assessment Microsoft Exchange Server Spoofing Vulnerability Server-side request forgery (ssrf) in Microsoft Exchange Server allows an authorized attacker to perform spoofing over a network.	6.5 · CVSS 3.1 · MediumSource: CNA	No confirmation recordedNo CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.None recordedNo exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.	EPSS: 0.46% · 37.6th percentileForecast date: 2026-10-07NETWORK · LOW complexity · LOW privileges · NONE user interaction	ScheduledMedium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.Awaiting fix. No fixed version is explicitly recorded in the structured CVE data.
CVE-2026-45500 Scheduled assessment Microsoft Exchange Server Spoofing Vulnerability 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.	6.1 · CVSS 3.1 · MediumSource: CNA	No confirmation recordedNo CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.None recordedNo exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.	EPSS: 0.41% · 33.5th percentileForecast date: 2026-10-07NETWORK · LOW complexity · NONE privileges · REQUIRED user interaction	ScheduledMedium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.Awaiting fix. No fixed version is explicitly recorded in the structured CVE data.