Vulnerability-Lookup

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

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.

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	CPE status
Altium	Altium Designer	Affected: 24.9 , ≤ 25.1 (semver)	guessed

Date Public

2025-04-04 15:43

Show details on NVD website

JSON

To clipboard

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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

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": [
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          ],
          "product": "Altium Designer",
          "vendor": "Altium",
          "versions": [
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              "changes": [
                {
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                  "status": "unaffected"
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              ],
              "lessThanOrEqual": "25.1",
              "status": "affected",
              "version": "24.9",
              "versionType": "semver"
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  ],
  "cveTags": [],
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    },
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      "lang": "es",
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    }
  ],
  "id": "CVE-2025-27377",
  "lastModified": "2026-06-17T09:03:29.123",
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GHSA-XFVG-P8X9-F25Q

Vulnerability from github – Published: 2026-01-22 03:31 – Updated: 2026-01-22 03:31

Details

Severity

5.3 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2025-27377"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-295"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-01-22T01:15:50Z",
    "severity": "MODERATE"
  },
  "details": "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.",
  "id": "GHSA-xfvg-p8x9-f25q",
  "modified": "2026-01-22T03:31:27Z",
  "published": "2026-01-22T03:31:27Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-27377"
    },
    {
      "type": "WEB",
      "url": "https://www.altium.com/platform/security-compliance/security-advisories"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}

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.

Action not permitted

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

FKIE_CVE-2025-27377

GHSA-XFVG-P8X9-F25Q

Tags

Sightings

Nomenclature

Related by attack behaviour