---
title: "CVE-2025-2783: Google Chromium Mojo Sandbox Escape Vulnerability"
url: https://erroneo.us/security/cve/CVE-2025-2783/
description: "CVE-2025-2783 (Google Chromium Mojo): Exploited in the wild (CISA KEV). Incorrect handle provided in unspecified circumstances in Mojo in Google Chrome on…"
type: vulnerability-record
section: "Security Digest"
date_published: 2025-03-26
date_modified: 2026-10-21
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2025-2783"
kev: true
cvss: 8.3
epss: 0.09238
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2025-2783: Google Chromium Mojo Sandbox Escape 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 Google Chromium Mojo. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2025-03-27, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2025-04-17 ; treat that as the outer limit, not the target.
- EPSS 9.2% , percentile 95: FIRST’s model estimates a 9.2% chance of exploitation activity in the next 30 days, higher than 95% 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.
- Editorial verdict: Most can relax. Chrome CVE-2025-2783: Mojo Sandbox Escape Zero-Day — A real zero-day used for espionage in early 2025, long since fixed by Chrome's automatic updates; the lasting lesson is to make sure auto-update actually works on your fleet.

## What it is

Incorrect handle provided in unspecified circumstances in Mojo in Google Chrome on Windows prior to 134.0.6998.177 allowed a remote attacker to perform a sandbox escape via a malicious file. (Chromium security severity: High)

## Affected products (CVE record)

- Google Chrome: 134.0.6998.177 < 134.0.6998.177

## Severity

- CISA-ADP CVSS 3.1: 8.3 `CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H`

## Exploitation

- CISA KEV: added 2025-03-27; federal due date 2025-04-17. Known ransomware use: Unknown.
- CISA required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, 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): 9.24% probability of exploitation activity in the next 30 days; percentile 95.

## Sources

- [Listed in CISA KEV notes (chromereleases.googleblog.com)](https://chromereleases.googleblog.com/2025/03/stable-channel-update-for-desktop_25.html)
- [CVE.org record CVE-2025-2783](https://www.cve.org/CVERecord?id=CVE-2025-2783)
- [NVD entry CVE-2025-2783](https://nvd.nist.gov/vuln/detail/CVE-2025-2783)
- [CISA Known Exploited Vulnerabilities catalog entry](https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-2783)
- [issues.chromium.org](https://issues.chromium.org/issues/405143032)

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Source page: https://erroneo.us/security/cve/CVE-2025-2783/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt