CVE-2025-9132VulnerabilityPublished 20 Aug 2025Updated 26 Feb 2026

CVE-2025-9132: Google Chrome · Out of bounds write

Affects Google ChromeSource CVE Database V5

Not known to be exploited · CVSS 8.8 High · fixed in 139.0.7258.138 : patch Google Chrome soon.

Data as of 26 Oct 2026, 06:26 UTC

CVSS 3.1 base score

8.8High

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 3.2% chance of exploitation in 30 days – higher than 88% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 139.0.7258.138

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: Required
Scope: Unchanged
Confidentiality: High
Integrity: High
Availability: High

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: Required: Successful exploitation of this vulnerability requires a user to take some action before the vulnerability can be exploited.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: High: There is total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact.
Integrity: High: There is a total loss of integrity, or a complete loss of protection. For example, the attacker is able to modify any/all files protected by the impacted component. Alternatively, only some files can be modified, but malicious modification would present a direct, serious consequence to the impacted component.
Availability: High: There is total loss of availability, resulting in the attacker being able to fully deny access to resources in the impacted component; this loss is either sustained (while the attacker continues to deliver the attack) or persistent (the condition persists even after the attack has completed). Alternatively, the attacker has the ability to deny some availability, but the loss of availability presents a direct, serious consequence to the impacted component (e.g., the attacker cannot disrupt existing connections, but can prevent new connections; the attacker can repeatedly exploit a vulnerability that, in each instance of a successful attack, leaks a only small amount of memory, but after repeated exploitation causes a service to become completely unavailable).

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 20 Aug 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-26.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Affected software

Product	Affected	Fixed in
Google Chrome	Affected =139.0.7258.138	Fixed in–

AI-suggested

To mitigate CVE-2025-9132, organizations should immediately update all instances of Google Chrome to version 139.0.7258.138 or later, as this version contains the fix for the vulnerability. Automated patch management systems should be leveraged to ensure rapid deployment across all endpoints. Beyond patching, organizations should implement browser hardening techniques such as disabling unnecessary plugins and extensions, enabling sandboxing features, and enforcing strict content security policies to limit exposure to malicious web content. Network-level defenses like web filtering and intrusion prevention systems should be configured to block access to known malicious domains and suspicious URLs. User awareness training is critical to reduce the risk of phishing attacks that could deliver the exploit payload. Additionally, monitoring browser behavior for anomalies and employing endpoint detection and response (EDR) solutions can help detect exploitation attempts. For high-security environments, consider restricting browser usage or employing virtualized browsing solutions to contain potential compromises. Regular vulnerability scanning and threat intelligence updates will help maintain awareness of emerging exploits related to this vulnerability.

Description

Out of bounds write in V8 in Google Chrome prior to 139.0.7258.138 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: High)

Impact

The potential impact of CVE-2025-9132 is significant for organizations worldwide due to the ubiquity of Google Chrome as a primary web browser. Successful exploitation can lead to arbitrary code execution within the browser context, enabling attackers to bypass security controls, steal sensitive information such as credentials and session tokens, and deploy malware or ransomware. This can result in data breaches, loss of intellectual property, disruption of business operations, and reputational damage. Since the vulnerability requires only that a user visit a malicious webpage, it can be exploited via phishing campaigns or malicious advertisements, increasing the attack surface. The cross-platform nature of Chrome means that organizations using diverse operating systems are all at risk. Additionally, compromised browsers can serve as entry points for lateral movement within corporate networks, escalating the threat to enterprise environments. The absence of known exploits in the wild currently provides a window for proactive patching, but the high severity score indicates that exploitation could have widespread and severe consequences if weaponized.

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 27 Feb 2026, 04:27 UTC

Technical details

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