Vulnerability-Lookup

FKIE_CVE-2025-27377

Vulnerability from fkie_nvd - Published: 2026-01-22 01:15 - Updated: 2026-06-17 09:03

Severity

5.3 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N

Summary

Altium Designer version 24.9.0 does not validate self-signed server certificates for cloud connections. An attacker capable of performing a man-in-the-middle (MITM) attack could exploit this issue to intercept or manipulate network traffic, potentially exposing authentication credentials or sensitive design data.

References

	URL	Tags
	4760f414-e1ae-4ff1-bdad-c7a9c3538b79	https://www.altium.com/platform/security-compliance/security-advisories	Vendor Advisory

Impacted products

	Vendor	Product	Version
	altium	designer	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "modules": [
            "Cloud connections"
          ],
          "platforms": [
            "Web"
          ],
          "product": "Altium Designer",
          "vendor": "Altium",
          "versions": [
            {
              "changes": [
                {
                  "at": "25.2",
                  "status": "unaffected"
                }
              ],
              "lessThanOrEqual": "25.1",
              "status": "affected",
              "version": "24.9",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "4760f414-e1ae-4ff1-bdad-c7a9c3538b79"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:altium:designer:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "4A0921CB-9CB8-4B03-A534-3C3655C0A756",
              "versionEndExcluding": "25.2.0",
              "versionStartIncluding": "24.9.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Altium Designer version 24.9.0 does not validate self-signed server certificates for cloud connections. An attacker capable of performing a man-in-the-middle (MITM) attack could exploit this issue to intercept or manipulate network traffic, potentially exposing authentication credentials or sensitive design data."
    },
    {
      "lang": "es",
      "value": "Altium Designer versi\u00f3n 24.9.0 no valida los certificados de servidor autofirmados para conexiones en la nube. Un atacante capaz de realizar un ataque man-in-the-middle (MitM) podr\u00eda explotar este problema para interceptar o manipular el tr\u00e1fico de red, exponiendo potencialmente credenciales de autenticaci\u00f3n o datos de dise\u00f1o sensibles."
    }
  ],
  "id": "CVE-2025-27377",
  "lastModified": "2026-06-17T09:03:29.123",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 1.6,
        "impactScore": 3.6,
        "source": "4760f414-e1ae-4ff1-bdad-c7a9c3538b79",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-27377",
          "options": [
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              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-01-22T14:41:09.462402Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-01-22T01:15:50.510",
  "references": [
    {
      "source": "4760f414-e1ae-4ff1-bdad-c7a9c3538b79",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://www.altium.com/platform/security-compliance/security-advisories"
    }
  ],
  "sourceIdentifier": "4760f414-e1ae-4ff1-bdad-c7a9c3538b79",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-295"
        }
      ],
      "source": "4760f414-e1ae-4ff1-bdad-c7a9c3538b79",
      "type": "Secondary"
    }
  ]
}

CVE-2025-27377 (GCVE-0-2025-27377)

Vulnerability from cvelistv5 – Published: 2026-01-22 00:16 – Updated: 2026-01-22 14:41

Title

Missing Validation of Self-Signed Certificates in Altium Designer Allows Man-in-the-Middle Attacks

Summary

Severity

5.3 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-01-22 14:41 UTC

CWE

CWE-295 - – Improper Certificate Validation

Assigner

Altium mitre root

References

1 reference

URL	Tags
https://www.altium.com/platform/security-complian…

Impacted products

1 product

Vendor	Product	Version
Altium	Altium Designer	Affected: 24.9 , ≤ 25.1 (semver)

Date Public

2025-04-04 15:43

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-27377",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-22T14:41:09.462402Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
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      }
    ],
    "cna": {
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          "defaultStatus": "unaffected",
          "modules": [
            "Cloud connections"
          ],
          "platforms": [
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          ],
          "product": "Altium Designer",
          "vendor": "Altium",
          "versions": [
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                {
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                  "status": "unaffected"
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              ],
              "lessThanOrEqual": "25.1",
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              "version": "24.9",
              "versionType": "semver"
            }
          ]
        }
      ],
      "datePublic": "2025-04-04T15:43:00.000Z",
      "descriptions": [
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          "lang": "en",
          "supportingMedia": [
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              "value": "Altium Designer version 24.9.0 does not validate self-signed server certificates for cloud connections. An attacker capable of performing a man-in-the-middle (MITM) attack could exploit this issue to intercept or manipulate network traffic, potentially exposing authentication credentials or sensitive design data.\u003cbr\u003e\u003cbr\u003e"
            }
          ],
          "value": "Altium Designer version 24.9.0 does not validate self-signed server certificates for cloud connections. An attacker capable of performing a man-in-the-middle (MITM) attack could exploit this issue to intercept or manipulate network traffic, potentially exposing authentication credentials or sensitive design data."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-94",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-94 Man-in-the-Middle Attack"
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
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          },
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          "scenarios": [
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          ]
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      "problemTypes": [
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          "descriptions": [
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              "cweId": "CWE-295",
              "description": "CWE-295 \u2013 Improper Certificate Validation",
              "lang": "en",
              "type": "CWE"
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      "providerMetadata": {
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      },
      "references": [
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          "url": "https://www.altium.com/platform/security-compliance/security-advisories"
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
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      "title": "Missing Validation of Self-Signed Certificates in Altium Designer Allows Man-in-the-Middle Attacks",
      "x_generator": {
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  },
  "cveMetadata": {
    "assignerOrgId": "4760f414-e1ae-4ff1-bdad-c7a9c3538b79",
    "assignerShortName": "Altium",
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    "datePublished": "2026-01-22T00:16:04.634Z",
    "dateReserved": "2025-02-23T21:02:12.105Z",
    "dateUpdated": "2026-01-22T14:41:16.446Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

Detection rules are retrieved from Rulezet.

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.

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.