CVE-2026-3343 (GCVE-0-2026-3343)

Vulnerability from cvelistv5 – Published: 2026-03-03 13:17 – Updated: 2026-03-04 15:22
VLAI?
Title
WatchGuard Firebox Reflected Cross-Site-Scripting (XSS) Vulnerability in Fireware Web UI
Summary
A reflected cross-site scripting (XSS) vulnerability in the Fireware OS Web UI enabled execution of malicious JavaScript in the context of an authenticated management user's browser when they click on a specially crafted link. This vulnerability affects Fireware OS 12.7 up to and including 12.11.7 and 2025.1 up to and including 2026.1.1.
Severity ?
5.1 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')
Assigner
References
Impacted products
Vendor Product Version
WatchGuard Fireware OS Affected: 12.7 , ≤ 12.11.7 (semver)
Affected: 2025.1 , ≤ 2026.1.1 (semver)
Create a notification for this product.
Credits
btaol
Show details on NVD website
To clipboard 

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      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-3343\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-03-03T14:44:26.500886Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-03-03T14:45:31.213Z\"}}], \"cna\": {\"title\": \"WatchGuard Firebox Reflected Cross-Site-Scripting (XSS) Vulnerability in Fireware Web UI\", \"source\": {\"defect\": [\"FBX-31282\"], \"advisory\": \"WGSA-2026-00004\", \"discovery\": \"EXTERNAL\"}, \"credits\": [{\"lang\": \"en\", \"type\": \"finder\", \"value\": \"btaol\"}], \"impacts\": [{\"capecId\": \"CAPEC-591\", \"descriptions\": [{\"lang\": \"en\", \"value\": \"CAPEC-591 Reflected XSS\"}]}], \"metrics\": [{\"format\": \"CVSS\", \"cvssV4_0\": {\"Safety\": \"NOT_DEFINED\", \"version\": \"4.0\", \"Recovery\": \"NOT_DEFINED\", \"baseScore\": 5.1, \"Automatable\": \"NOT_DEFINED\", \"attackVector\": \"NETWORK\", \"baseSeverity\": \"MEDIUM\", \"valueDensity\": \"NOT_DEFINED\", \"vectorString\": \"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N\", \"providerUrgency\": \"NOT_DEFINED\", \"userInteraction\": \"ACTIVE\", \"attackComplexity\": \"LOW\", \"attackRequirements\": \"NONE\", \"privilegesRequired\": \"NONE\", \"subIntegrityImpact\": \"NONE\", \"vulnIntegrityImpact\": \"LOW\", \"subAvailabilityImpact\": \"NONE\", \"vulnAvailabilityImpact\": \"NONE\", \"subConfidentialityImpact\": \"NONE\", \"vulnConfidentialityImpact\": \"LOW\", \"vulnerabilityResponseEffort\": \"NOT_DEFINED\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"vendor\": \"WatchGuard\", \"product\": \"Fireware OS\", \"versions\": [{\"status\": \"affected\", \"version\": \"12.7\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"12.11.7\"}, {\"status\": \"affected\", \"version\": \"2025.1\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"2026.1.1\"}], \"defaultStatus\": \"unaffected\"}], \"exploits\": [{\"lang\": \"en\", \"value\": \"WatchGuard is not aware of any exploitation of this issue in the wild.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"WatchGuard is not aware of any exploitation of this issue in the wild.\", \"base64\": false}]}], \"references\": [{\"url\": \"https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-00004\"}], \"x_generator\": {\"engine\": \"Vulnogram 0.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"A reflected cross-site scripting (XSS) vulnerability in the Fireware OS Web UI enabled execution of malicious JavaScript in the context of an authenticated management user\u0027s browser when they click on a specially crafted link.\\n\\nThis vulnerability affects Fireware OS 12.7 up to and including 12.11.7 and 2025.1 up to and including 2026.1.1.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"A reflected cross-site scripting (XSS) vulnerability in the Fireware OS Web UI enabled execution of malicious JavaScript in the context of an authenticated management user\u0027s browser when they click on a specially crafted link.\u003cbr\u003e\u003cbr\u003e\u003cdiv\u003e\u003cdiv\u003eThis vulnerability affects Fireware OS 12.7 up to and including 12.11.7 and 2025.1 up to and including 2026.1.1.\u003c/div\u003e\u003c/div\u003e\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-79\", \"description\": \"CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or \u0027Cross-site Scripting\u0027)\"}]}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:a:watchguard:fireware_os:*:*:*:*:*:*:*:12.7\", \"vulnerable\": true, \"versionEndIncluding\": \"12.11.7\", \"versionStartIncluding\": \"12.7\"}, {\"criteria\": \"cpe:2.3:a:watchguard:fireware_os:*:*:*:*:*:*:*:2025.1\", \"vulnerable\": true, \"versionEndIncluding\": \"2026.1.1\", \"versionStartIncluding\": \"2025.1\"}], \"operator\": \"OR\"}], \"operator\": \"OR\"}], \"providerMetadata\": {\"orgId\": \"5d1c2695-1a31-4499-88ae-e847036fd7e3\", \"shortName\": \"WatchGuard\", \"dateUpdated\": \"2026-03-04T15:22:22.283Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-3343\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-03-04T15:22:22.283Z\", \"dateReserved\": \"2026-02-27T15:37:10.115Z\", \"assignerOrgId\": \"5d1c2695-1a31-4499-88ae-e847036fd7e3\", \"datePublished\": \"2026-03-03T13:17:48.810Z\", \"assignerShortName\": \"WatchGuard\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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Tags
Taxonomy of the tags.




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.