CVE-2026-50752 (GCVE-0-2026-50752)
Vulnerability from cvelistv5 – Published: 2026-06-08 11:00 – Updated: 2026-06-10 13:36
VLAI
EPSS
VEX
Title
Certificate Validation Bypass in VPN Site-to-Site Connections Using IKEv1
Summary
A weakness in the certificate validation logic of the deprecated IKEv1 key exchange may allow an unauthenticated attacker positioned as a man-in-the-middle to bypass certificate validation in VPN site-to-site connections that use certificate-based authentication. Successful exploitation could allow interception or modification of traffic traversing the VPN tunnel.
Severity
7.4 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-09 03:55 UTC
CWE
- CWE-295 - Improper Certificate Validation.
Assigner
References
1 reference
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| checkpoint | Quantum Security Gateway |
Affected:
R82.10 with Jumbo Hotfix Take 19 or below
Affected: R82 with Jumbo Hotfix Take 103 or below Affected: R81.20 with Jumbo Hotfix Take 141 or below Affected: R81.10, R81, and R80.40 |
guessed | |
| checkpoint | Spark Firewalls |
Affected:
R80.20.X, R81.10.X, and R82.00.X
|
guessed |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-50752",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-06-09T03:55:37.901004Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-06-10T13:36:24.946Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "Quantum Security Gateway",
"vendor": "checkpoint",
"versions": [
{
"status": "affected",
"version": "R82.10 with Jumbo Hotfix Take 19 or below"
},
{
"status": "affected",
"version": "R82 with Jumbo Hotfix Take 103 or below"
},
{
"status": "affected",
"version": "R81.20 with Jumbo Hotfix Take 141 or below"
},
{
"status": "affected",
"version": "R81.10, R81, and R80.40"
}
]
},
{
"product": "Spark Firewalls",
"vendor": "checkpoint",
"versions": [
{
"status": "affected",
"version": "R80.20.X, R81.10.X, and R82.00.X"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "A weakness in the certificate validation logic of the deprecated IKEv1 key exchange may allow an unauthenticated attacker positioned as a man-in-the-middle to bypass certificate validation in VPN site-to-site connections that use certificate-based authentication. Successful exploitation could allow interception or modification of traffic traversing the VPN tunnel."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 7.4,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
"version": "3.1"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-295",
"description": "CWE-295: Improper Certificate Validation.",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-06-08T11:00:38.563Z",
"orgId": "897c38be-0345-43cd-b6cf-fe179e0c4f45",
"shortName": "checkpoint"
},
"references": [
{
"url": "https://support.checkpoint.com/results/sk/sk185035"
}
],
"title": "Certificate Validation Bypass in VPN Site-to-Site Connections Using IKEv1"
}
},
"cveMetadata": {
"assignerOrgId": "897c38be-0345-43cd-b6cf-fe179e0c4f45",
"assignerShortName": "checkpoint",
"cveId": "CVE-2026-50752",
"datePublished": "2026-06-08T11:00:38.563Z",
"dateReserved": "2026-06-07T09:42:08.252Z",
"dateUpdated": "2026-06-10T13:36:24.946Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-50752",
"date": "2026-10-14",
"epss": "0.0026",
"percentile": "0.16464"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"product": "Quantum Security Gateway",
"vendor": "checkpoint",
"versions": [
{
"status": "affected",
"version": "R82.10 with Jumbo Hotfix Take 19 or below"
},
{
"status": "affected",
"version": "R82 with Jumbo Hotfix Take 103 or below"
},
{
"status": "affected",
"version": "R81.20 with Jumbo Hotfix Take 141 or below"
},
{
"status": "affected",
"version": "R81.10, R81, and R80.40"
}
]
},
{
"product": "Spark Firewalls",
"vendor": "checkpoint",
"versions": [
{
"status": "affected",
"version": "R80.20.X, R81.10.X, and R82.00.X"
}
]
}
],
"source": "cve@checkpoint.com"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "A weakness in the certificate validation logic of the deprecated IKEv1 key exchange may allow an unauthenticated attacker positioned as a man-in-the-middle to bypass certificate validation in VPN site-to-site connections that use certificate-based authentication. Successful exploitation could allow interception or modification of traffic traversing the VPN tunnel."
},
{
"lang": "es",
"value": "Una debilidad en la l\u00f3gica de validaci\u00f3n de certificados del intercambio de claves IKEv1 obsoleto podr\u00eda permitir a un atacante no autenticado posicionado como un man-in-the-middle eludir la validaci\u00f3n de certificados en conexiones VPN de sitio a sitio que utilizan autenticaci\u00f3n basada en certificados. Una explotaci\u00f3n exitosa podr\u00eda permitir la interceptaci\u00f3n o modificaci\u00f3n del tr\u00e1fico que atraviesa el t\u00fanel VPN."
}
],
"id": "CVE-2026-50752",
"lastModified": "2026-07-23T07:10:00.113",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 7.4,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
"version": "3.1"
},
"exploitabilityScore": 2.2,
"impactScore": 5.2,
"source": "cve@checkpoint.com",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-50752",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-06-09T03:55:37.901004Z",
"version": "2.0.3"
}
}
]
},
"published": "2026-06-08T12:16:32.503",
"references": [
{
"source": "cve@checkpoint.com",
"url": "https://support.checkpoint.com/results/sk/sk185035"
}
],
"sourceIdentifier": "cve@checkpoint.com",
"vulnStatus": "Awaiting Analysis",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-295"
}
],
"source": "cve@checkpoint.com",
"type": "Secondary"
}
]
}
},
"redhat_vex": {
"current_release_date": "2026-06-10T14:59:43+00:00",
"cve": "CVE-2026-50752",
"id": "CVE-2026-50752",
"initial_release_date": "2026-01-01T00:00:00+00:00",
"product_status:known_not_affected": "1",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "Certificate Validation Bypass in VPN Site-to-Site Connections Using IKEv1",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-50752.json",
"version": "3"
},
"vulnrichment": {
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-50752",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-06-09T03:55:37.901004Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-06-08T12:55:47.994Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "Quantum Security Gateway",
"vendor": "checkpoint",
"versions": [
{
"status": "affected",
"version": "R82.10 with Jumbo Hotfix Take 19 or below"
},
{
"status": "affected",
"version": "R82 with Jumbo Hotfix Take 103 or below"
},
{
"status": "affected",
"version": "R81.20 with Jumbo Hotfix Take 141 or below"
},
{
"status": "affected",
"version": "R81.10, R81, and R80.40"
}
]
},
{
"product": "Spark Firewalls",
"vendor": "checkpoint",
"versions": [
{
"status": "affected",
"version": "R80.20.X, R81.10.X, and R82.00.X"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "A weakness in the certificate validation logic of the deprecated IKEv1 key exchange may allow an unauthenticated attacker positioned as a man-in-the-middle to bypass certificate validation in VPN site-to-site connections that use certificate-based authentication. Successful exploitation could allow interception or modification of traffic traversing the VPN tunnel."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 7.4,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
"version": "3.1"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-295",
"description": "CWE-295: Improper Certificate Validation.",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-06-08T11:00:38.563Z",
"orgId": "897c38be-0345-43cd-b6cf-fe179e0c4f45",
"shortName": "checkpoint"
},
"references": [
{
"url": "https://support.checkpoint.com/results/sk/sk185035"
}
],
"title": "Certificate Validation Bypass in VPN Site-to-Site Connections Using IKEv1"
}
},
"cveMetadata": {
"assignerOrgId": "897c38be-0345-43cd-b6cf-fe179e0c4f45",
"assignerShortName": "checkpoint",
"cveId": "CVE-2026-50752",
"datePublished": "2026-06-08T11:00:38.563Z",
"dateReserved": "2026-06-07T09:42:08.252Z",
"dateUpdated": "2026-06-10T13:36:24.946Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
Loading timeline…
Loading…
Loading…
The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Loading…
Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.