---
title: "CVE-2018-0824: Microsoft COM for Windows Deserialization of Untrusted Data Vulnerability"
url: https://erroneo.us/security/cve/CVE-2018-0824/
description: "CVE-2018-0824 (Microsoft Windows): Exploited in the wild (CISA KEV). A remote code execution vulnerability exists in \"Microsoft COM for Windows\" when it…"
type: vulnerability-record
section: "Security Digest"
date_published: 2018-05-09
date_modified: 2025-10-21
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2018-0824"
kev: true
cvss: 7.5
epss: 0.73037
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2018-0824: Microsoft COM for Windows Deserialization of Untrusted Data Vulnerability

**Signal:** Exploited: patch now if you run it. CISA has confirmed exploitation in the wild. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Yes, if you run Microsoft Windows. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2024-08-05, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2024-08-26 ; treat that as the outer limit, not the target.
- EPSS 73.0% , percentile 99: FIRST’s model estimates a 73.0% chance of exploitation activity in the next 30 days, higher than 99% of all scored CVEs (very high). EPSS is a probability, not a verdict.
- Needs a user to click or open something. Phishing makes that realistic, but it is not wormable.

## What it is

A remote code execution vulnerability exists in "Microsoft COM for Windows" when it fails to properly handle serialized objects, aka "Microsoft COM for Windows Remote Code Execution Vulnerability." This affects Windows 7, Windows Server 2012 R2, Windows RT 8.1, Windows Server 2008, Windows Server 2012, Windows 8.1, Windows Server 2016, Windows Server 2008 R2, Windows 10, Windows 10 Servers.

## Affected products (CVE record)

- n/a n/a: see advisory

## Severity

- CISA-ADP CVSS 3.1: 7.5 `CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H`

## Exploitation

- CISA KEV: added 2024-08-05; federal due date 2024-08-26. Known ransomware use: Unknown.
- CISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- CISA SSVC assessment: exploitation active , automatable no , technical impact total .
- FIRST EPSS (model of 2026-10-21): 73.04% probability of exploitation activity in the next 30 days; percentile 99.

## Sources

- [Listed in CISA KEV notes (msrc.microsoft.com)](https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2018-0824)
- [CVE.org record CVE-2018-0824](https://www.cve.org/CVERecord?id=CVE-2018-0824)
- [NVD entry CVE-2018-0824](https://nvd.nist.gov/vuln/detail/CVE-2018-0824)
- [CISA Known Exploited Vulnerabilities catalog entry](https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-0824)
- [1040848](http://www.securitytracker.com/id/1040848)
- [44906](https://www.exploit-db.com/exploits/44906/)
- [104030](http://www.securityfocus.com/bid/104030)
- [portal.msrc.microsoft.com](https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0824)

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Source page: https://erroneo.us/security/cve/CVE-2018-0824/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt