BIG-IP SSL/TLS vulnerability_CVE-2026-40629

7.5 / 10

HIGH

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

Description

When SSL profiles are configured on a virtual server, undisclosed traffic can cause the virtual server to stop processing new client connections. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Basic Information

ID CVE-2026-40629

Source f5

Published May 13, 2026 at 14:12

Affected Product

Vendor F5

Product BIG-IP

Version 21.0.0

Affected Versions F5 BIG-IP 17.5.0
F5 BIG-IP 17.1.0
F5 BIG-IP 16.1.0
F5 BIG-IP Next SPK 2.0.0
F5 BIG-IP Next SPK 1.7.0
F5 BIG-IP Next CNF 2.0.0
F5 BIG-IP Next CNF 1.1.0
F5 BIG-IP Next for Kubernetes 2.0.0

CWE Classification

CWE-770

References

my.f5.com /manage/s/article/K000158978

{
    "lastseen": "",
    "description": "When SSL profiles are configured on a virtual server, undisclosed traffic can cause the virtual server to stop processing new client connections.\u00a0\u00a0Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.",
    "published": "2026-05-13T14:12:32.862Z",
    "modified": "2026-05-13T14:12:32.862Z",
    "type": "cve",
    "title": "BIG-IP SSL/TLS vulnerability",
    "source": "f5",
    "references": "https://my.f5.com/manage/s/article/K000158978",
    "id": "CVE-2026-40629",
    "bulletinFamily": "",
    "cwe": [
        "CWE-770"
    ],
    "cvelist": null,
    "sourceData": "F5 BIG-IP 17.5.0\nF5 BIG-IP 17.1.0\nF5 BIG-IP 16.1.0\nF5 BIG-IP Next SPK 2.0.0\nF5 BIG-IP Next SPK 1.7.0\nF5 BIG-IP Next CNF 2.0.0\nF5 BIG-IP Next CNF 1.1.0\nF5 BIG-IP Next for Kubernetes 2.0.0",
    "sourceHref": "",
    "cvss": {
        "score": 7.5,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "BIG-IP",
    "version": "21.0.0",
    "vendor": "F5",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}