CVE-2025-6555VulnerabilityPublished 24 Jun 2025Updated 26 Feb 2026

CVE-2025-6555: Google Chrome · Use after free

Affects Google ChromeSource CVE Database V5

Not known to be exploited · CVSS 5.4 Medium : upgrade to 138.0.7204.49 when convenient.

Data as of 25 Oct 2026, 19:02 UTC

CVSS 3.1 base score

5.4Medium

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

EPSS: 0.2% chance of exploitation in 30 days – higher than 10% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 138.0.7204.49

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

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

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: Low: There is some loss of confidentiality. Access to some restricted information is obtained, but the attacker does not have control over what information is obtained, or the amount or kind of loss is limited. The information disclosure does not cause a direct, serious loss to the impacted component.
Integrity: Low: Modification of data is possible, but the attacker does not have control over the consequence of a modification, or the amount of modification is limited. The data modification does not have a direct, serious impact on the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 24 Jun 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 2026-10-25.

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

Upgrade Google Chrome to 138.0.7204.49.

Affected software

Product	Affected	Fixed in
Google Chrome	Affected =138.0.7204.49 <138.0.7204.49	Fixed in 138.0.7204.49

AI-suggested

Organizations and users should promptly update Google Chrome to version 138.0.7204.49 or later, where this vulnerability is addressed. Since no direct patch links were provided, users should rely on official Google Chrome update channels to obtain the fix. Additionally, organizations should implement web filtering to block access to untrusted or suspicious websites that could host malicious HTML content exploiting this vulnerability. Employing endpoint detection and response (EDR) solutions that monitor for anomalous browser behavior can help detect exploitation attempts. User education is critical to reduce risky browsing behaviors, emphasizing caution when clicking unknown links or visiting unfamiliar sites. For high-security environments, consider deploying browser isolation technologies to contain potential exploitation. Regularly reviewing browser extensions and disabling unnecessary ones can reduce attack surface. Finally, maintain an up-to-date inventory of browser versions in use across the organization to ensure timely patch management.

Description

Use after free in Animation in Google Chrome prior to 138.0.7204.49 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: Medium)

Impact

The primary impact of CVE-2025-6555 is on the confidentiality and integrity of user data within the browser environment. Successful exploitation could allow an attacker to execute arbitrary code or manipulate browser memory, potentially leading to data leakage or unauthorized actions within the browser context. However, the vulnerability does not affect system availability and requires user interaction, limiting its ease of exploitation. Given Google Chrome's dominant global market share as a web browser, a large number of users and organizations worldwide are potentially exposed if they run vulnerable versions. This could lead to targeted attacks against high-value users or organizations, especially those relying heavily on web applications. The absence of known exploits in the wild reduces immediate risk but does not eliminate the threat, as attackers may develop exploits once the vulnerability details become widely known. Organizations that delay patching may face increased risk of compromise, data breaches, or browser-based attacks.

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 27 Feb 2026, 04:11 UTC

Technical details

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