CVE-2026-14440

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• 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

0.19% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 9.5% of scored records. A rank, not a probability.

NVD base score

7.6 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

NVD analysis status

Awaiting Analysis. NVD last modified this record on 2026-10-25.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

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

2026-07-01 22:35Z3 MO AGO

Last updated

2026-07-02 19:22Z3 MO AGO

Reserved

2026-07-01

Assigning CNA

cloudflare

Record state

PUBLISHED

Severity

High (CVSS 7.6)

CNA CVSS vector

CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

Weaknesses

• CWE-693Protection Mechanism FailurePillar

Data version

5.2

Document digest

d860018ad92679e637d1eb9407ba47c7e25a9e4d7833a9b021922311848f08a2

• developers.cloudflare.comhttps://developers.cloudflare.com/ssl/edge-certificates/caa-records/
• developers.cloudflare.comhttps://developers.cloudflare.com/ssl/edge-certificates/universal-ssl/limitations/
• www.rfc-editor.orghttps://www.rfc-editor.org/rfc/rfc8657
• www.rfc-editor.orghttps://www.rfc-editor.org/rfc/rfc8659
• david-osipov.visionhttps://david-osipov.vision/en/blog/cybersecurity/cloudflare-ssl-mitm-flaw-2026/technical-descriptionexploit
• community.cloudflare.comhttps://community.cloudflare.com/t/critical-security-gap-cloudflare-must-fully-support-rfc-8657-caa/799999/10related
• community.cloudflare.comhttps://community.cloudflare.com/t/universal-ssl-exposes-domains-to-bgp-leaks-re-venezuela-analysis/879930related
• zenodo.orghttps://zenodo.org/records/18330221technical-descriptionexploit