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UK Cyber Defence
VulnerabilityAnalyzed

CVE-2023-36874

Microsoft Windows Error Reporting Service Privilege Escalation Vulnerability

KEVHIGH 7.8EPSS 42.6%

Does this matter?

Known to be exploited in the wild (CISA KEV, CISA remediation deadline 1 August 2023). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.

Description

Windows Error Reporting Service Elevation of Privilege Vulnerability

CVSS 3.1
7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS
42.56% probability · 99th percentile
Public exploits
None in Exploit-DB
CISA KEV
Listed 11 July 2023 · due 1 August 2023
Weakness
CWE-59
Affected
microsoft/windows 10 1507 · microsoft/windows 10 1607 · microsoft/windows 10 1809 · microsoft/windows 10 21h2 · microsoft/windows 10 22h2 · microsoft/windows 11 21h2 · microsoft/windows 11 22h2 · microsoft/windows server 2008 · microsoft/windows server 2012 · microsoft/windows server 2016 · microsoft/windows server 2019 · microsoft/windows server 2022
Source
secure@microsoft.com
EPSS trend
0%23%45%30 October 2026: 42.56%30 October 202630 October 2026

EPSS 42.6% since 30 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

CISA notes

Apply updates per vendor instructions or discontinue use of the product if updates are unavailable. https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2023-36874; https://nvd.nist.gov/vuln/detail/CVE-2023-36874

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.