CVE-2025-6558

Exploitation

Exploited in the wild. Listed in the CISA Known Exploited Vulnerabilities catalog on 2025-07-22. Federal remediation due 2025-08-12.

SSVC decision

• ExploitationactiveCISA reports credible evidence of active exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

9.59% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 95.2% of scored records. A rank, not a probability.

NVD base score

8.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Analyzed. NVD last modified this record on 2026-06-17.

Red Hat severity

Important. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2025-07-15 18:12Z1 YR AGO

Last updated

2026-02-26 17:50Z6 MO AGO

Reserved

2025-06-23

Assigning CNA

Chrome

Record state

PUBLISHED

Severity

High (CVSS 8.8)

CNA CVSS vector

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

Weaknesses

• CWE-20Improper Input ValidationClass
• CWE-76Improper Neutralization of Equivalent Special ElementsBase

Data version

5.2

Document digest

b65d87caf4be7744d2207129aaccebab076df423ade33cffb754cb71946195b0

• chromereleases.googleblog.comhttps://chromereleases.googleblog.com/2025/07/stable-channel-update-for-desktop_15.html
• issues.chromium.orghttps://issues.chromium.org/issues/427162086
• www.cisa.govhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-6558government-resource
• lists.debian.orghttps://lists.debian.org/debian-lts-announce/2025/08/msg00015.html
• seclists.orghttp://seclists.org/fulldisclosure/2025/Aug/0
• seclists.orghttp://seclists.org/fulldisclosure/2025/Jul/37
• seclists.orghttp://seclists.org/fulldisclosure/2025/Jul/35
• seclists.orghttp://seclists.org/fulldisclosure/2025/Jul/32
• seclists.orghttp://seclists.org/fulldisclosure/2025/Jul/30
• www.openwall.comhttp://www.openwall.com/lists/oss-security/2025/08/02/1