VulnTideExploited vulnerabilities, by vendor. Data as of .
Not in CISA KEVPublished EPSS 20.3% probability of exploitation in 30 days
Microsoft

CVE-2026-45502: Microsoft Exchange Server Information Disclosure Vulnerability

Is it exploited?

Not on CISA's list. CISA has not added it to the Known Exploited Vulnerabilities catalog as of . If CISA adds it, this page shows it as known exploited.

How likely is exploitation in the next 30 days?
20.3%

EPSS score, percentile 97.5 of all scored records. A probability estimated by FIRST, not a report of exploitation.

How severe?
5.0 Medium

CVSS v3.1 base score, given by the CNA

What should I do?

CISA has set no required action, because the vulnerability is not in KEV.

Advisories and patches (1)

Which versions are affected?

Affected

  • from 15.01.0.0 to before 15.01.2507.071
  • from 15.02.0.0 to before 15.02.1544.043
  • from 15.02.0.0 to before 15.02.1748.048
  • from 15.02.0.0 to before 15.02.2562.045

Versions by product

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of ; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of ; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of . About the data.

What to do

Advisories and patches

Affected products and versions

As listed in the CVE record.

Microsoft Microsoft Exchange Server 2016 Cumulative Update 23
StatusVersions
Affectedfrom 15.01.0.0 to before 15.01.2507.071
Microsoft Microsoft Exchange Server 2019 Cumulative Update 14
StatusVersions
Affectedfrom 15.02.0.0 to before 15.02.1544.043
Microsoft Microsoft Exchange Server 2019 Cumulative Update 15
StatusVersions
Affectedfrom 15.02.0.0 to before 15.02.1748.048
Microsoft Microsoft Exchange Server Subscription Edition RTM
StatusVersions
Affectedfrom 15.02.0.0 to before 15.02.2562.045

Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of . About the data.

About this vulnerability

Server-side request forgery (ssrf) in Microsoft Exchange Server allows an authorized attacker to disclose information over a network.

Summary: CVE record, as of .

  • CISA has not added CVE-2026-45502 to its Known Exploited Vulnerabilities (KEV) catalog, as of 28 Oct 2026.
  • The CVE record was published on 9 Jun 2026.
  • The CVE record carries a CVSS v3.1 base score of 5.0 (Medium), given by its CNA.
  • FIRST's EPSS model puts the probability of exploitation in the next 30 days at 20.3% (percentile 97.5), as of 28 Oct 2026. EPSS is a statistical estimate, not a report of exploitation.
  • CISA's SSVC assessment in the CVE record: exploitation none, automatable no, technical impact partial.

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of ; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of ; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of . About the data.

Description

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.

Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of . About the data.

Weakness

  • CWE-918: Server-Side Request Forgery (SSRF)

CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record.

Timeline

DateEvent
CVE record published
CVE record last updated

Known exploited Microsoft vulnerabilities

  • CVE-2026-96951: Microsoft Windows Command Injection Vulnerability (added )
  • CVE-2026-65660: Microsoft SharePoint Code Injection Vulnerability (added )
  • CVE-2026-81963: Microsoft Windows Link Following Vulnerability (added )
  • CVE-2026-85880: Microsoft Windows Heap-Based Buffer Overflow Vulnerability (added )
  • CVE-2019-1068: Microsoft SQL Server Remote Code Execution Vulnerability (added )