Vulnerability-Lookup

CVE-2026-78008 (GCVE-0-2026-78008)

Vulnerability from cvelistv5 – Published: 2026-08-27 23:24 – Updated: 2026-08-29 03:56

Title

Fireware OS Authenticated Buffer Overflow in wgagent

Summary

A buffer overflow vulnerability in the WatchGuard Fireware OS Management Web UI allows an authenticated administrator with network access to cause a denial of service (DoS) condition or potentially execute arbitrary code by sending specially crafted network traffic.

Severity

8.6 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-28 00:00 UTC

CWE

CWE-787

Assigner

WatchGuard mitre root

References

1 reference

URL	Tags
https://psirt.watchguard.com/CVE-2026-78008	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)	guessed
WatchGuard	Fireware OS	Affected: 12.0 , < 12.5.20 (custom)	guessed

Credits

Cody Sixteen

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-78008

Vulnerability from fkie_nvd - Published: 2026-08-28 02:16 - Updated: 2026-08-29 04:18

Severity

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

Summary

References

	URL	Tags
	5d1c2695-1a31-4499-88ae-e847036fd7e3	https://psirt.watchguard.com/CVE-2026-78008

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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GHSA-48WP-98WM-5FPP

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

Details

Severity

8.6 (High)


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

Show details on source website

JSON

To clipboard

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  },
  "details": "A buffer overflow vulnerability in the WatchGuard Fireware OS Management Web UI allows an authenticated administrator with network access to cause a denial of service (DoS) condition or potentially execute arbitrary code by sending specially crafted network traffic.",
  "id": "GHSA-48wp-98wm-5fpp",
  "modified": "2026-08-28T03:31:24Z",
  "published": "2026-08-28T03:31:24Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-78008"
    },
    {
      "type": "WEB",
      "url": "https://psirt.watchguard.com/CVE-2026-78008"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/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

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.

Action not permitted

CVE-2026-78008 (GCVE-0-2026-78008)

FKIE_CVE-2026-78008

GHSA-48WP-98WM-5FPP

Tags

Sightings

Nomenclature