Vulnerability-Lookup

CVE-2026-78010 (GCVE-0-2026-78010)

Vulnerability from cvelistv5 – Published: 2026-08-27 23:24 – Updated: 2026-09-03 20:49

Title

Fireware OS Stack-Based Buffer Overflow in iked Allows Unauthenticated Denial of Service

Summary

A stack-based buffer overflow vulnerability in the WatchGuard Fireware OS iked process iallows a remote unauthenticated attacker to create a Denial of Service (DoS) condition in VPN processing by sending specially crafted network traffic.

Severity

8.7 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-28 16:53 UTC

CWE

Assigner

WatchGuard mitre root

References

1 reference

URL	Tags
https://psirt.watchguard.com/CVE-2026-78010	vendor-advisory

Impacted products

2 products

Vendor	Product	Version	CPE status
WatchGuard	Fireware OS	Affected: 2025.0 , < 2026.2.2 (custom) Affected: 12.0 , < 12.12.2 (custom) Affected: 2026.3 , < 2026.3.1 (custom)	guessed
WatchGuard	Fireware OS	Affected: 12.0 , < 12.5.20 (custom)	guessed

Date Public

2026-08-27 23:24

Credits

Discovered Internally by WatchGuard AI Security Research

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-78010

Vulnerability from fkie_nvd - Published: 2026-08-28 02:16 - Updated: 2026-09-03 21:17

Severity

8.7 (High) - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Summary

References

	URL	Tags
	5d1c2695-1a31-4499-88ae-e847036fd7e3	https://psirt.watchguard.com/CVE-2026-78010

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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        }
      ],
      "source": "5d1c2695-1a31-4499-88ae-e847036fd7e3",
      "type": "Secondary"
    }
  ]
}

GHSA-HJXC-CXCG-9XJH

Vulnerability from github – Published: 2026-08-28 03:31 – Updated: 2026-08-28 03:31

Details

Severity

8.7 (High)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

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{
  "affected": [],
  "aliases": [
    "CVE-2026-78010"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-121"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-28T02:16:22Z",
    "severity": "HIGH"
  },
  "details": "A stack-based buffer overflow vulnerability in the WatchGuard Fireware OS iked process iallows a remote unauthenticated attacker to create a Denial of Service (DoS) condition in VPN processing by sending specially crafted network traffic.",
  "id": "GHSA-hjxc-cxcg-9xjh",
  "modified": "2026-08-28T03:31:24Z",
  "published": "2026-08-28T03:31:24Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-78010"
    },
    {
      "type": "WEB",
      "url": "https://psirt.watchguard.com/CVE-2026-78010"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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Confirmed: The vulnerability has been validated from an analyst's perspective.
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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-2026-78010 (GCVE-0-2026-78010)

FKIE_CVE-2026-78010

GHSA-HJXC-CXCG-9XJH

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Related by attack behaviour