CVE-2026-76435 (GCVE-0-2026-76435)
Vulnerability from cvelistv5 – Published: 2026-10-21 16:14 – Updated: 2026-10-22 13:37
VLAI
EPSS
VEX
Title
Cisco Expressway Series Information Disclosure Vulnerability
Summary
A vulnerability in Cisco Expressway Series could allow an unauthenticated, remote attacker to obtain sensitive information from an affected device.
This vulnerability is due to insufficient authorization checks of HTTP requests during Mobile and Remote Access (MRA) provisioning. An attacker could exploit this vulnerability by submitting a crafted URL request to an affected device. A successful exploit could allow the attacker to access sensitive information that they would otherwise not have authorization to access.
Note: Cisco Expressway Series refers to Cisco Expressway Core (Expressway-C) devices and Cisco Expressway Edge (Expressway-E) devices.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-22 13:22 UTC
CWE
- CWE-497 - Exposure of Sensitive System Information to an Unauthorized Control Sphere
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Cisco | Cisco TelePresence Video Communication Server (VCS) Expressway |
Affected:
X8.11.2
Affected: X8.6 Affected: X8.11.3 Affected: X8.2.2 Affected: X8.8.3 Affected: X8.11.0 Affected: X12.5.2 Affected: X8.1.1 Affected: X8.9 Affected: X12.5.1 Affected: X12.5.6 Affected: X8.7.3 Affected: X12.6.0 Affected: X8.11.1 Affected: X8.5 Affected: X8.9.1 Affected: X8.10.2 Affected: X8.8.2 Affected: X8.5.3 Affected: X8.1 Affected: X8.9.2 Affected: X8.11.4 Affected: X12.5.4 Affected: X8.8.1 Affected: X8.2.1 Affected: X8.5.1 Affected: X8.6.1 Affected: X8.1.2 Affected: X8.8 Affected: X8.10.0 Affected: X12.5.3 Affected: X8.10.1 Affected: X12.5.7 Affected: X8.10.3 Affected: X8.7.1 Affected: X8.2 Affected: X12.5.8 Affected: X8.7 Affected: X8.5.2 Affected: X12.5.9 Affected: X12.5.0 Affected: X8.10.4 Affected: X8.7.2 Affected: X12.5.5 Affected: X12.6.1 Affected: X12.6.2 Affected: X12.6.3 Affected: X12.6.4 Affected: X12.7.0 Affected: X12.7.1 Affected: X14.0.0 Affected: X14.0.1 Affected: X14.0.2 Affected: X14.0.3 Affected: X14.0.4 Affected: X14.0.5 Affected: X14.0.6 Affected: X14.0.7 Affected: X14.0.8 Affected: X14.2.0 Affected: X14.0.9 Affected: X14.2.1 Affected: X14.2.2 Affected: X14.0.11 Affected: X14.2.5 Affected: X14.0.10 Affected: X14.2.6 Affected: X14.2.7 Affected: X14.3.0 Affected: X14.3.1 Affected: X14.3.2 Affected: X14.3.3 Affected: X15.0.0 Affected: X14.3.4 Affected: X14.3.5 Affected: X15.0.1 Affected: X15.0.2 Affected: X15.0.3 Affected: X14.3.6 Affected: X15.2.0 Affected: X15.2.1 Affected: X15.2.2 Affected: X15.2.3 Affected: X14.3.7 Affected: X15.2.4. Affected: X15.2.4 Affected: X15.3.0 Affected: X15.3.1 Affected: X15.3.2 Affected: X15.4.0 Affected: X15.5.0 Affected: X15.5.1 Affected: X15.5.2 |
guessed |
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"options": [
{
"exploitation": "none"
},
{
"automatable": "yes"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-10-22T13:22:06.316293Z",
"version": "2.0.3"
}
}
]
},
"published": "2026-10-21T17:19:06.243",
"references": [
{
"source": "psirt@cisco.com",
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-expressway-inf-disc-vvYqgSTS"
}
],
"sourceIdentifier": "psirt@cisco.com",
"vulnStatus": "Awaiting Analysis",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-497"
}
],
"source": "psirt@cisco.com",
"type": "Secondary"
}
]
}
},
"vulnrichment": {
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-76435",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-10-22T13:22:06.316293Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-10-22T13:36:32.849Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unknown",
"product": "Cisco TelePresence Video Communication Server (VCS) Expressway",
"vendor": "Cisco",
"versions": [
{
"status": "affected",
"version": "X8.11.2"
},
{
"status": "affected",
"version": "X8.6"
},
{
"status": "affected",
"version": "X8.11.3"
},
{
"status": "affected",
"version": "X8.2.2"
},
{
"status": "affected",
"version": "X8.8.3"
},
{
"status": "affected",
"version": "X8.11.0"
},
{
"status": "affected",
"version": "X12.5.2"
},
{
"status": "affected",
"version": "X8.1.1"
},
{
"status": "affected",
"version": "X8.9"
},
{
"status": "affected",
"version": "X12.5.1"
},
{
"status": "affected",
"version": "X12.5.6"
},
{
"status": "affected",
"version": "X8.7.3"
},
{
"status": "affected",
"version": "X12.6.0"
},
{
"status": "affected",
"version": "X8.11.1"
},
{
"status": "affected",
"version": "X8.5"
},
{
"status": "affected",
"version": "X8.9.1"
},
{
"status": "affected",
"version": "X8.10.2"
},
{
"status": "affected",
"version": "X8.8.2"
},
{
"status": "affected",
"version": "X8.5.3"
},
{
"status": "affected",
"version": "X8.1"
},
{
"status": "affected",
"version": "X8.9.2"
},
{
"status": "affected",
"version": "X8.11.4"
},
{
"status": "affected",
"version": "X12.5.4"
},
{
"status": "affected",
"version": "X8.8.1"
},
{
"status": "affected",
"version": "X8.2.1"
},
{
"status": "affected",
"version": "X8.5.1"
},
{
"status": "affected",
"version": "X8.6.1"
},
{
"status": "affected",
"version": "X8.1.2"
},
{
"status": "affected",
"version": "X8.8"
},
{
"status": "affected",
"version": "X8.10.0"
},
{
"status": "affected",
"version": "X12.5.3"
},
{
"status": "affected",
"version": "X8.10.1"
},
{
"status": "affected",
"version": "X12.5.7"
},
{
"status": "affected",
"version": "X8.10.3"
},
{
"status": "affected",
"version": "X8.7.1"
},
{
"status": "affected",
"version": "X8.2"
},
{
"status": "affected",
"version": "X12.5.8"
},
{
"status": "affected",
"version": "X8.7"
},
{
"status": "affected",
"version": "X8.5.2"
},
{
"status": "affected",
"version": "X12.5.9"
},
{
"status": "affected",
"version": "X12.5.0"
},
{
"status": "affected",
"version": "X8.10.4"
},
{
"status": "affected",
"version": "X8.7.2"
},
{
"status": "affected",
"version": "X12.5.5"
},
{
"status": "affected",
"version": "X12.6.1"
},
{
"status": "affected",
"version": "X12.6.2"
},
{
"status": "affected",
"version": "X12.6.3"
},
{
"status": "affected",
"version": "X12.6.4"
},
{
"status": "affected",
"version": "X12.7.0"
},
{
"status": "affected",
"version": "X12.7.1"
},
{
"status": "affected",
"version": "X14.0.0"
},
{
"status": "affected",
"version": "X14.0.1"
},
{
"status": "affected",
"version": "X14.0.2"
},
{
"status": "affected",
"version": "X14.0.3"
},
{
"status": "affected",
"version": "X14.0.4"
},
{
"status": "affected",
"version": "X14.0.5"
},
{
"status": "affected",
"version": "X14.0.6"
},
{
"status": "affected",
"version": "X14.0.7"
},
{
"status": "affected",
"version": "X14.0.8"
},
{
"status": "affected",
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},
{
"status": "affected",
"version": "X14.0.9"
},
{
"status": "affected",
"version": "X14.2.1"
},
{
"status": "affected",
"version": "X14.2.2"
},
{
"status": "affected",
"version": "X14.0.11"
},
{
"status": "affected",
"version": "X14.2.5"
},
{
"status": "affected",
"version": "X14.0.10"
},
{
"status": "affected",
"version": "X14.2.6"
},
{
"status": "affected",
"version": "X14.2.7"
},
{
"status": "affected",
"version": "X14.3.0"
},
{
"status": "affected",
"version": "X14.3.1"
},
{
"status": "affected",
"version": "X14.3.2"
},
{
"status": "affected",
"version": "X14.3.3"
},
{
"status": "affected",
"version": "X15.0.0"
},
{
"status": "affected",
"version": "X14.3.4"
},
{
"status": "affected",
"version": "X14.3.5"
},
{
"status": "affected",
"version": "X15.0.1"
},
{
"status": "affected",
"version": "X15.0.2"
},
{
"status": "affected",
"version": "X15.0.3"
},
{
"status": "affected",
"version": "X14.3.6"
},
{
"status": "affected",
"version": "X15.2.0"
},
{
"status": "affected",
"version": "X15.2.1"
},
{
"status": "affected",
"version": "X15.2.2"
},
{
"status": "affected",
"version": "X15.2.3"
},
{
"status": "affected",
"version": "X14.3.7"
},
{
"status": "affected",
"version": "X15.2.4."
},
{
"status": "affected",
"version": "X15.2.4"
},
{
"status": "affected",
"version": "X15.3.0"
},
{
"status": "affected",
"version": "X15.3.1"
},
{
"status": "affected",
"version": "X15.3.2"
},
{
"status": "affected",
"version": "X15.4.0"
},
{
"status": "affected",
"version": "X15.5.0"
},
{
"status": "affected",
"version": "X15.5.1"
},
{
"status": "affected",
"version": "X15.5.2"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability in Cisco Expressway Series could allow an unauthenticated, remote attacker to obtain sensitive information from an affected device.\r\n\r\nThis vulnerability is due to insufficient authorization checks of HTTP requests during Mobile and Remote Access (MRA) provisioning. An attacker could exploit this vulnerability by submitting a crafted URL request to an affected device. A successful exploit could allow the attacker to access sensitive information that they would otherwise not have authorization to access.\r\nNote: Cisco Expressway Series refers to Cisco Expressway Core (Expressway-C) devices and Cisco Expressway Edge (Expressway-E) devices."
}
],
"exploits": [
{
"lang": "en",
"value": "The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerabilities that are described in this advisory."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
"version": "3.1"
},
"format": "cvssV3_1"
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-497",
"description": "Exposure of Sensitive System Information to an Unauthorized Control Sphere",
"lang": "en",
"type": "cwe"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-10-21T16:14:19.230Z",
"orgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
"shortName": "cisco"
},
"references": [
{
"name": "cisco-sa-expressway-inf-disc-vvYqgSTS",
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-expressway-inf-disc-vvYqgSTS"
}
],
"source": {
"advisory": "cisco-sa-expressway-inf-disc-vvYqgSTS",
"defects": [
"CSCww11368"
],
"discovery": "EXTERNAL"
},
"title": "Cisco Expressway Series Information Disclosure Vulnerability"
}
},
"cveMetadata": {
"assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
"assignerShortName": "cisco",
"cveId": "CVE-2026-76435",
"datePublished": "2026-10-21T16:14:19.230Z",
"dateReserved": "2026-08-19T12:02:03.634Z",
"dateUpdated": "2026-10-21T16:14:19.230Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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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
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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.
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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.