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CVE-2026-13371 (GCVE-0-2026-13371)

Vulnerability from cvelistv5 – Published: 2026-07-02 23:04 – Updated: 2026-08-27 22:58
VLAI
Title
WatchGuard Firebox Management Web UI Denial of Service via Unsafe Deserialization
Summary
An authenticated administrator can trigger a denial-of-service condition in the Fireware Management Web UI by sending malformed or crafted data to the put_data endpoint, which performs unsafe deserialization of the attacker-supplied input.
Severity
6.9 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/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 2026-07-06 18:04 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
WatchGuard Fireware OS Affected: 2025.1 , < 2026.2.1 (custom)
Affected: 12.0 , < 12.12.1 (custom)
guessed Create a notification for this product.
WatchGuard Fireware OS Affected: 12.0 , < 12.11.9 (custom)
guessed Create a notification for this product.
WatchGuard Fireware OS Affected: 12.0 , < 12.5.19 (custom)
guessed Create a notification for this product.
Date Public
2026-07-02 23:04
Credits
Cody Sixteen
Show details on NVD website
To clipboard 

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      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-13371\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-07-06T18:04:59.649744Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-07-06T18:05:00.842Z\"}}], \"cna\": {\"title\": \"WatchGuard Firebox Management Web UI Denial of Service via Unsafe Deserialization\", \"credits\": [{\"lang\": \"en\", \"type\": \"finder\", \"value\": \"Cody Sixteen\"}], \"metrics\": [{\"cvssV4_0\": {\"version\": \"4.0\", \"baseScore\": 6.9, \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N\"}}], \"affected\": [{\"vendor\": \"WatchGuard\", \"product\": \"Fireware OS\", \"versions\": [{\"status\": \"affected\", \"version\": \"2025.1\", \"lessThan\": \"2026.2.1\", \"versionType\": \"custom\"}, {\"status\": \"affected\", \"version\": \"12.0\", \"lessThan\": \"12.12.1\", \"versionType\": \"custom\"}], \"platforms\": [\"Default\"], \"defaultStatus\": \"unaffected\"}, {\"vendor\": \"WatchGuard\", \"product\": \"Fireware OS\", \"versions\": [{\"status\": \"affected\", \"version\": \"12.0\", \"lessThan\": \"12.11.9\", \"versionType\": \"custom\"}], \"platforms\": [\"EUCC\"], \"defaultStatus\": \"unaffected\"}, {\"vendor\": \"WatchGuard\", \"product\": \"Fireware OS\", \"versions\": [{\"status\": \"affected\", \"version\": \"12.0\", \"lessThan\": \"12.5.19\", \"versionType\": \"custom\"}], \"platforms\": [\"T15/T35\"], \"defaultStatus\": \"unaffected\"}], \"exploits\": [{\"lang\": \"en\", \"value\": \"WatchGuard is not aware of any exploitation of this vulnerability in the wild.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"WatchGuard is not aware of any exploitation of this vulnerability in the wild.\", \"base64\": false}]}], \"solutions\": [{\"lang\": \"en\", \"value\": \"Fireware OS 2026.2.1, Fireware OS 12.12.1, Fireware OS 12.11.9, Fireware OS 12.5.19\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cp\u003eFireware OS 2026.2.1, Fireware OS 12.12.1, Fireware OS 12.11.9, Fireware OS 12.5.19\u003c/p\u003e\", \"base64\": false}]}], \"datePublic\": \"2026-07-02T23:04:42.674Z\", \"references\": [{\"url\": \"https://psirt.watchguard.com/CVE-2026-13371\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-00014\", \"tags\": [\"vendor-advisory\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"An authenticated administrator can trigger a denial-of-service condition in the Fireware Management Web UI by sending malformed or crafted data to the put_data endpoint, which performs unsafe deserialization of the attacker-supplied input.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-502\", \"description\": \"CWE-502\"}]}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:a:watchguard:fireware_os:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"12.11.9\", \"versionStartIncluding\": \"12.0\"}, {\"criteria\": \"cpe:2.3:a:watchguard:fireware_os:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"12.5.19\", \"versionStartIncluding\": \"12.0\"}, {\"criteria\": \"cpe:2.3:a:watchguard:fireware_os:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"2026.2.1\", \"versionStartIncluding\": \"2025.1\"}, {\"criteria\": \"cpe:2.3:a:watchguard:fireware_os:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"12.12.1\", \"versionStartIncluding\": \"12.0\"}], \"operator\": \"OR\"}], \"operator\": \"OR\"}], \"providerMetadata\": {\"orgId\": \"5d1c2695-1a31-4499-88ae-e847036fd7e3\", \"shortName\": \"WatchGuard\", \"dateUpdated\": \"2026-08-27T22:58:26.802Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-13371\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-27T22:58:26.802Z\", \"dateReserved\": \"2026-06-25T19:43:53.207Z\", \"assignerOrgId\": \"5d1c2695-1a31-4499-88ae-e847036fd7e3\", \"datePublished\": \"2026-07-02T23:04:42.674Z\", \"assignerShortName\": \"WatchGuard\"}",
      "dataType": "CVE_RECORD",
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    }
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}



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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.


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.