CVE-2025-6558
Insufficient validation of untrusted input in ANGLE and GPU in Google Chrome prior to 138.0.7204.157 allowed a remote attacker to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: High)
do firstApply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Can a WAF block it? No. The attack involves a crafted HTML page delivered via a web request, but the malicious input exploits a sandbox escape through GPU and ANGLE components, which likely looks like normal web content to a firewall and does not contain distinct patterns to filter.
Also consider: patch
Based on an AI reading of the CVE description, and no vendor rule found yet. We check Cloudflare, AWS, Google Cloud Armor and Azure; for Akamai, Imperva, Fastly, F5, ask your vendor.
Is CVE-2025-6558 being exploited?
Yes. CVE-2025-6558 appears in CISA's Known Exploited Vulnerabilities catalog, which means exploitation in the wild has been confirmed and reported. Treat it as active rather than theoretical, and patch it ahead of higher-scoring vulnerabilities that carry no exploitation evidence.
How severe is CVE-2025-6558?
CVE-2025-6558 is rated High with a CVSS score of 8.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2025-6558?
Yes. A fix has been recorded for CVE-2025-6558. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2025-6558 affect?
CVE-2025-6558 affects google:chrome, debian:debian_linux, apple:safari, apple:ipados, and 6 further products or versions. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
- affected< 138.0.7204.157
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.
public exploits
Unvetted proof-of-concept code on GitHub: 2 GitHub proofs of concept
Listed so you can judge urgency, not as a recommendation to run anything. GitHub “proofs of concept” are unvetted: some are fake or carry malware. Exploit-DB marks the entries its staff verified.
cisa ssvc
- exploitation
- active
- automatable
- no
- technical impact
- total
Assessed by CISA 22 Jul 2025 (SSVC 2.0.3).
timeline
- 15 Jul 2025Published
- 22 Jul 2025Added to CISA KEV (exploited in the wild) · 6 days later
- 22 Jul 2025First proof-of-concept repository on GitHub (unvetted) · same day later
- 22 Jul 2025CISA SSVC assessment: exploitation active · same day later
- 12 Aug 2025CISA remediation due date (US federal agencies) · 21 days later
- 1 Oct 2026CVE record last updated · 415 days (about 1 year) later
- 2 Nov 2026Analysed by vulneraibility.com · 33 days later
- Linkchromereleases.googleblog.com /2025/07/stable-channel-update-for-desktop_15.html
- Linkissues.chromium.org /issues/427162086
- Linkcisa.gov /known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-6558
- Linklists.debian.org /debian-lts-announce/2025/08/msg00015.html
- Linkseclists.org /fulldisclosure/2025/Aug/0
- Linkseclists.org /fulldisclosure/2025/Jul/37
- Linkseclists.org /fulldisclosure/2025/Jul/35
- Linkseclists.org /fulldisclosure/2025/Jul/32
Show 3 more
- Linkseclists.org /fulldisclosure/2025/Jul/30
- Linkopenwall.com /lists/oss-security/2025/08/02/1
- Linkopenwall.com /lists/oss-security/2026/09/30/18
sources
- CVE List (CVE.org): description, affected versions, references; CVE Terms of Use
- NVD: CVSS and CPE data
- CISA KEV catalog: exploitation, date added, due date
- CISA Vulnrichment (ADP): SSVC decision points
- FIRST EPSS: exploit probability and percentile
- PoC-in-GitHub: GitHub repositories that claim a proof of concept
- Summary, impact and triage tags: written by our AI analysis pipeline from the sources above. Check them against the sources.