cvelistv5 - cve-2025-36855

CVE-2025-36855 (GCVE-0-2025-36855)

Vulnerability from cvelistv5 – Published: 2025-09-08 13:57 – Updated: 2025-09-08 14:06

Summary

A vulnerability ( CVE-2025-21176 https://www.cve.org/CVERecord ) exists in DiaSymReader.dll due to buffer over-read. Per CWE-126: Buffer Over-read https://cwe.mitre.org/data/definitions/126.html , Buffer Over-read is when a product reads from a buffer using buffer access mechanisms such as indexes or pointers that reference memory locations after the targeted buffer. This issue affects EOL ASP.NET 6.0.0 <= 6.0.36 as represented in this CVE, as well as 8.0.0 <= 8.0.11 & <= 9.0.0 as represented in CVE-2025-21176. Additionally, if you've deployed self-contained applications https://docs.microsoft.com/dotnet/core/deploying/#self-contained-deployments-scd targeting any of the impacted versions, these applications are also vulnerable and must be recompiled and redeployed. NOTE: This CVE affects only End Of Life (EOL) software components. The vendor, Microsoft, has indicated there will be no future updates nor support provided upon inquiry.

Severity ?

8.8 (High)


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

CWE

CWE-126 - Buffer Over-read

Assigner

HeroDevs

References

URL

Tags

	https://www.herodevs.com/vulnerability-directory/…	third-party-advisory
	https://msrc.microsoft.com/update-guide/vulnerabi…	vendor-advisory

Impacted products

	Vendor	Product	Version
	Microsoft	.NET 6.0	Affected: 6.0.0 , < 6.0.36 (custom)

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2025-36855

Vulnerability from fkie_nvd - Published: 2025-09-08 14:15 - Updated: 2025-09-08 16:25

Severity ?

8.8 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Summary

References

	URL	Tags
	36c7be3b-2937-45df-85ea-ca7133ea542c	https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21176
	36c7be3b-2937-45df-85ea-ca7133ea542c	https://www.herodevs.com/vulnerability-directory/cve-2025-21176

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A vulnerability ( CVE-2025-21176 https://www.cve.org/CVERecord ) exists in DiaSymReader.dll\u00a0due to buffer over-read.\n\n Per  CWE-126: Buffer Over-read https://cwe.mitre.org/data/definitions/126.html , Buffer Over-read is when a product reads from a buffer using buffer access mechanisms such as indexes or pointers that reference memory locations after the targeted buffer.\n\n  This issue affects EOL ASP.NET 6.0.0 \u003c= 6.0.36 as represented in this CVE, as well as 8.0.0 \u003c= 8.0.11 \u0026 \u003c= 9.0.0 as represented in\u00a0CVE-2025-21176.\n\n \n\n Additionally, if you\u0027ve deployed  self-contained applications https://docs.microsoft.com/dotnet/core/deploying/#self-contained-deployments-scd \u00a0targeting any of the impacted versions, these applications are also vulnerable and must be recompiled and redeployed.\n\n NOTE:\u00a0This CVE affects only End Of Life (EOL)\u00a0software components. The vendor, Microsoft, has indicated there will be no future updates nor support provided upon inquiry."
    }
  ],
  "id": "CVE-2025-36855",
  "lastModified": "2025-09-08T16:25:38.810",
  "metrics": {
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          "scope": "UNCHANGED",
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          "version": "3.1"
        },
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        "impactScore": 5.9,
        "source": "36c7be3b-2937-45df-85ea-ca7133ea542c",
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GHSA-642H-GGVV-J2C4

Vulnerability from github – Published: 2025-09-08 15:37 – Updated: 2025-09-08 15:37

Details

A vulnerability ( CVE-2025-21176 https://www.cve.org/CVERecord ) exists in DiaSymReader.dll due to buffer over-read.

Per CWE-126: Buffer Over-read https://cwe.mitre.org/data/definitions/126.html , Buffer Over-read is when a product reads from a buffer using buffer access mechanisms such as indexes or pointers that reference memory locations after the targeted buffer.

This issue affects EOL ASP.NET 6.0.0 <= 6.0.36 as represented in this CVE, as well as 8.0.0 <= 8.0.11 & <= 9.0.0 as represented in CVE-2025-21176.

Additionally, if you've deployed self-contained applications https://docs.microsoft.com/dotnet/core/deploying/#self-contained-deployments-scd targeting any of the impacted versions, these applications are also vulnerable and must be recompiled and redeployed.

NOTE: This CVE affects only End Of Life (EOL) software components. The vendor, Microsoft, has indicated there will be no future updates nor support provided upon inquiry.

Severity ?

8.8 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2025-36855"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-126"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-09-08T14:15:34Z",
    "severity": "HIGH"
  },
  "details": "A vulnerability ( CVE-2025-21176 https://www.cve.org/CVERecord ) exists in DiaSymReader.dll\u00a0due to buffer over-read.\n\n Per  CWE-126: Buffer Over-read https://cwe.mitre.org/data/definitions/126.html , Buffer Over-read is when a product reads from a buffer using buffer access mechanisms such as indexes or pointers that reference memory locations after the targeted buffer.\n\n  This issue affects EOL ASP.NET 6.0.0 \u003c= 6.0.36 as represented in this CVE, as well as 8.0.0 \u003c= 8.0.11 \u0026 \u003c= 9.0.0 as represented in\u00a0CVE-2025-21176.\n\n \n\n Additionally, if you\u0027ve deployed  self-contained applications https://docs.microsoft.com/dotnet/core/deploying/#self-contained-deployments-scd \u00a0targeting any of the impacted versions, these applications are also vulnerable and must be recompiled and redeployed.\n\n NOTE:\u00a0This CVE affects only End Of Life (EOL)\u00a0software components. The vendor, Microsoft, has indicated there will be no future updates nor support provided upon inquiry.",
  "id": "GHSA-642h-ggvv-j2c4",
  "modified": "2025-09-08T15:37:44Z",
  "published": "2025-09-08T15:37:44Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-36855"
    },
    {
      "type": "WEB",
      "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21176"
    },
    {
      "type": "WEB",
      "url": "https://www.herodevs.com/vulnerability-directory/cve-2025-21176"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
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      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

Sightings

Author	Source	Type	Date

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.

Action not permitted

CVE-2025-36855 (GCVE-0-2025-36855)

FKIE_CVE-2025-36855

GHSA-642H-GGVV-J2C4

Tags

Sightings

Nomenclature