Is there a public PoC exploit available for CVE-2018-25242?

Yes, a public proof-of-concept exploit is available for CVE-2018-25242. Prioritise patching immediately. EPSS: 0.0%.

Microsoft CVE-2018-25242

Q: What is the CVSS score of CVE-2018-25242?

CVE-2018-25242 has a CVSS 4.0 base score of 6.9 (Medium). CVSS vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X. EPSS exploitation probability: 0.0%.

EUVD-2018-21738 MEDIUM

Incorrect Parsing of Numbers with Different Radices (CWE-1389)

2026-04-04 VulnCheck

GHSA-c84p-gr27-9c8h

Denial Of Service Microsoft

6.9

CVSS 4.0 · NVD

Severity by source

NVD PRIMARY

6.9 MEDIUM

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Lifecycle Timeline

PoC Detected

Apr 07, 2026 - 13:20 vuln.today

Public exploit code

EUVD ID Assigned

Apr 04, 2026 - 14:00 euvd

EUVD-2018-21738

CVE Published

Apr 04, 2026 - 13:51 nvd

MEDIUM 6.9

DescriptionCVE.org

Microsoft One Search 1.1.0.0 contains a denial of service vulnerability that allows local attackers to crash the application by submitting excessively long input strings to the search functionality. Attackers can paste a buffer of 950 or more characters into the search bar to trigger an unhandled exception that crashes the application.

AnalysisAI

Microsoft One Search 1.1.0.0 contains a denial of service vulnerability that allows local attackers to crash the application by submitting excessively long input strings to the search functionality. Rated medium severity (CVSS 6.9), this vulnerability is no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified under CWE-1389. Microsoft One Search 1.1.0.0 contains a denial of service vulnerability that allows local attackers to crash the application by submitting excessively long input strings to the search functionality. Attackers can paste a buffer of 950 or more characters into the search bar to trigger an unhandled exception that crashes the application. Affected products include: Onesearch One Search.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.