CVE-2026-11541 (GCVE-0-2026-11541)

Vulnerability from cvelistv5 – Published: 2026-06-30 20:56 – Updated: 2026-07-29 18:12
VLAI
Title
Inconsistent Interpretation of HTTP Requests in CICS Transaction Gateway for Multiplatforms.
Summary
IBM CICS Transaction Gateway for Multiplatforms 9.1, 9.2, 9.3, and 10.1 IBM WebSphere Application Server 9.0, and 8.5 and IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.6 are affected by an HTTP request smuggling vulnerability.
Severity
7.4 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-01 14:52 UTC
CWE
  • CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
Assigner
ibm
References
URL Tags
https://www.ibm.com/support/pages/node/7281750 vendor-advisorypatch
Impacted products
Vendor Product Version
IBM CICS Transaction Gateway for Multiplatforms Affected: 9.1
Affected: 9.2
Affected: 9.3
Affected: 10.1
Create a notification for this product.
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Link\u003c/a\u003e\u003c/p\u003e\u003cp\u003e\u003ca href=\"https://www.ibm.com/support/fixcentral/quickorder?product=ibm%2FWebSphere%2FCICS+Transaction+Gateway+for+Multiplatforms\u0026amp;fixids=9.3.0.0-CICSTG-PH72094-WIN\u0026amp;source=SAR\" rel=\"nofollow\"\u003eWindows Link\u003c/a\u003e\u003c/p\u003e\u003cp\u003e\u003ca href=\"https://www.ibm.com/support/fixcentral/quickorder?product=ibm%2FWebSphere%2FCICS+Transaction+Gateway+for+Multiplatforms\u0026amp;fixids=9.3.0.0-CICSTG-PH72094-ILNX\u0026amp;source=SAR\" rel=\"nofollow\"\u003eiLinux Link\u003c/a\u003e\u003c/p\u003e\u003cp\u003e\u003ca href=\"https://www.ibm.com/support/fixcentral/quickorder?product=ibm%2FWebSphere%2FCICS+Transaction+Gateway+for+Multiplatforms\u0026amp;fixids=9.3.0.0-CICSTG-PH72094-ZLNX\u0026amp;source=SAR\" rel=\"nofollow\"\u003ezLinux Link\u003c/a\u003e\u003c/p\u003e\u003cp\u003e\u003ca 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          "value": "IBM strongly recommends addressing the vulnerabilities now by downloading and applying the CICS Transaction Gateway for Multiplatforms fixes.\n\n\n\nProduct\n\nVRMF\n\nAPAR\n\nRemediation/First Fix\n\nCICS Transaction Gateway for Multiplatforms9.1.0.0\n\n-\n\nPSIRT fixes for CICS Transaction Gateway for Multiplatforms will be provided only to customers covered by Extended Support and only upon request through an IBM Support case.\n\nCICS Transaction Gateway for Multiplatforms9.2.0.0\n\nPH72094\n\n\n\n AIX Link https://www.ibm.com/support/fixcentral/quickorder \n\n\n\n pLinux Big Endian Link https://www.ibm.com/support/fixcentral/quickorder \n\n\n\n Windows Link https://www.ibm.com/support/fixcentral/quickorder \n\n\n\n iLinux Link https://www.ibm.com/support/fixcentral/quickorder \n\n\n\n zLinux Link https://www.ibm.com/support/fixcentral/quickorder \n\n\n\n\n\nCICS Transaction Gateway for Multiplatforms9.3.0.0\n\nPH72094\n\n\n\n AIX Link https://www.ibm.com/support/fixcentral/quickorder \n\n\n\n pLinux Little Endian Link https://www.ibm.com/support/fixcentral/quickorder \n\n\n\n pLinux Big Endian Link https://www.ibm.com/support/fixcentral/quickorder \n\n\n\n Windows Link https://www.ibm.com/support/fixcentral/quickorder \n\n\n\n iLinux Link https://www.ibm.com/support/fixcentral/quickorder \n\n\n\n zLinux Link https://www.ibm.com/support/fixcentral/quickorder \n\n\n\n x86 Container Link https://www.ibm.com/support/fixcentral/quickorder \n\n\n\n 390x Container Link https://www.ibm.com/support/fixcentral/quickorder \n\nCICS Transaction Gateway for Multiplatforms10.1.0.0\n\nPH72095\n\n\n\n AIX Link https://www.ibm.com/support/fixcentral/quickorder \n\n\n\n pLinux Little Endian Link https://www.ibm.com/support/fixcentral/quickorder \n\n\n\n Windows Link https://www.ibm.com/support/fixcentral/quickorder \n\n\n\n iLinux Link https://www.ibm.com/support/fixcentral/quickorder \n\n\n\n zLinux Link https://www.ibm.com/support/fixcentral/quickorder \n\n\n\n x86 Container Link https://www.ibm.com/support/fixcentral/quickorder \n\n\n\n 390x Container Link https://www.ibm.com/support/fixcentral/quickorder"
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    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-11541\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-07-01T14:52:04.153923Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-07-01T14:52:11.835Z\"}}], \"cna\": {\"title\": \"Inconsistent Interpretation of HTTP Requests in CICS Transaction Gateway for Multiplatforms.\", \"metrics\": [{\"format\": \"CVSS\", \"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 7.4, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"HIGH\", \"availabilityImpact\": \"NONE\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"HIGH\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"vendor\": \"IBM\", \"product\": \"CICS Transaction Gateway for Multiplatforms\", \"versions\": [{\"status\": \"affected\", \"version\": \"9.1\"}, {\"status\": \"affected\", \"version\": \"9.2\"}, {\"status\": \"affected\", \"version\": \"9.3\"}, {\"status\": \"affected\", \"version\": \"10.1\"}]}], \"solutions\": [{\"lang\": \"en\", \"value\": \"IBM strongly recommends addressing the vulnerabilities now by downloading and applying the CICS Transaction Gateway for Multiplatforms fixes.\\n\\n\\n\\nProduct\\n\\nVRMF\\n\\nAPAR\\n\\nRemediation/First Fix\\n\\nCICS Transaction Gateway for Multiplatforms9.1.0.0\\n\\n-\\n\\nPSIRT fixes for CICS Transaction Gateway for Multiplatforms will be provided only to customers covered by Extended Support and only upon request through an IBM Support case.\\n\\nCICS Transaction Gateway for Multiplatforms9.2.0.0\\n\\nPH72094\\n\\n\\n\\n AIX Link https://www.ibm.com/support/fixcentral/quickorder \\n\\n\\n\\n pLinux Big Endian Link https://www.ibm.com/support/fixcentral/quickorder \\n\\n\\n\\n Windows Link https://www.ibm.com/support/fixcentral/quickorder \\n\\n\\n\\n iLinux Link https://www.ibm.com/support/fixcentral/quickorder \\n\\n\\n\\n zLinux Link https://www.ibm.com/support/fixcentral/quickorder \\n\\n\\n\\n\\n\\nCICS Transaction Gateway for Multiplatforms9.3.0.0\\n\\nPH72094\\n\\n\\n\\n AIX Link https://www.ibm.com/support/fixcentral/quickorder \\n\\n\\n\\n pLinux Little Endian Link https://www.ibm.com/support/fixcentral/quickorder \\n\\n\\n\\n pLinux Big Endian Link https://www.ibm.com/support/fixcentral/quickorder \\n\\n\\n\\n Windows Link https://www.ibm.com/support/fixcentral/quickorder \\n\\n\\n\\n iLinux Link https://www.ibm.com/support/fixcentral/quickorder \\n\\n\\n\\n zLinux Link https://www.ibm.com/support/fixcentral/quickorder \\n\\n\\n\\n x86 Container Link https://www.ibm.com/support/fixcentral/quickorder \\n\\n\\n\\n 390x Container Link https://www.ibm.com/support/fixcentral/quickorder \\n\\nCICS Transaction Gateway for Multiplatforms10.1.0.0\\n\\nPH72095\\n\\n\\n\\n AIX Link https://www.ibm.com/support/fixcentral/quickorder \\n\\n\\n\\n pLinux Little Endian Link https://www.ibm.com/support/fixcentral/quickorder \\n\\n\\n\\n Windows Link https://www.ibm.com/support/fixcentral/quickorder \\n\\n\\n\\n iLinux Link https://www.ibm.com/support/fixcentral/quickorder \\n\\n\\n\\n zLinux Link https://www.ibm.com/support/fixcentral/quickorder \\n\\n\\n\\n x86 Container Link https://www.ibm.com/support/fixcentral/quickorder \\n\\n\\n\\n 390x Container Link https://www.ibm.com/support/fixcentral/quickorder\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cdiv\u003e\u003cp\u003e\u003cstrong\u003eIBM strongly recommends addressing the vulnerabilities now by downloading and applying the CICS Transaction Gateway for Multiplatforms fixes.\u003c/strong\u003e\u003c/p\u003e\u003c/div\u003e\u003cdiv\u003e\u003ctable\u003e\u003ctbody\u003e\u003ctr\u003e\u003ctd\u003e\u003cdiv\u003e\u003cstrong\u003eProduct\u003c/strong\u003e\u003c/div\u003e\u003c/td\u003e\u003ctd\u003e\u003cdiv\u003e\u003cstrong\u003eVRMF\u003c/strong\u003e\u003c/div\u003e\u003c/td\u003e\u003ctd\u003e\u003cdiv\u003e\u003cstrong\u003eAPAR\u003c/strong\u003e\u003c/div\u003e\u003c/td\u003e\u003ctd\u003e\u003cdiv\u003e\u003cstrong\u003eRemediation/First Fix\u003c/strong\u003e\u003c/div\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003eCICS Transaction Gateway for Multiplatforms\u003c/td\u003e\u003ctd\u003e9.1.0.0\u003c/td\u003e\u003ctd\u003e\u003cp\u003e-\u003c/p\u003e\u003c/td\u003e\u003ctd\u003e\u003cdiv\u003ePSIRT fixes for CICS Transaction Gateway for Multiplatforms will be provided only to customers covered by Extended Support and only upon request through an IBM Support case.\u003c/div\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003eCICS Transaction Gateway for Multiplatforms\u003c/td\u003e\u003ctd\u003e9.2.0.0\u003c/td\u003e\u003ctd\u003e\u003cp\u003ePH72094\u003c/p\u003e\u003c/td\u003e\u003ctd\u003e\u003cp\u003e\u003ca href=\\\"https://www.ibm.com/support/fixcentral/quickorder?product=ibm%2FWebSphere%2FCICS+Transaction+Gateway+for+Multiplatforms\u0026amp;fixids=9.2.0.2-CICSTG-PH72094-AIX\u0026amp;source=SAR\\\" rel=\\\"nofollow\\\"\u003eAIX Link\u003c/a\u003e\u003c/p\u003e\u003cp\u003e\u003ca href=\\\"https://www.ibm.com/support/fixcentral/quickorder?product=ibm%2FWebSphere%2FCICS+Transaction+Gateway+for+Multiplatforms\u0026amp;fixids=9.2.0.2-CICSTG-PH72094-PLNX\u0026amp;source=SAR\\\" rel=\\\"nofollow\\\"\u003epLinux Big Endian Link\u003c/a\u003e\u003c/p\u003e\u003cp\u003e\u003ca href=\\\"https://www.ibm.com/support/fixcentral/quickorder?product=ibm%2FWebSphere%2FCICS+Transaction+Gateway+for+Multiplatforms\u0026amp;fixids=9.2.0.2-CICSTG-PH72094-WIN\u0026amp;source=SAR\\\" rel=\\\"nofollow\\\"\u003eWindows Link\u003c/a\u003e\u003c/p\u003e\u003cp\u003e\u003ca href=\\\"https://www.ibm.com/support/fixcentral/quickorder?product=ibm%2FWebSphere%2FCICS+Transaction+Gateway+for+Multiplatforms\u0026amp;fixids=9.2.0.2-CICSTG-PH72094-ILNX\u0026amp;source=SAR\\\" rel=\\\"nofollow\\\"\u003eiLinux Link\u003c/a\u003e\u003c/p\u003e\u003cp\u003e\u003ca href=\\\"https://www.ibm.com/support/fixcentral/quickorder?product=ibm%2FWebSphere%2FCICS+Transaction+Gateway+for+Multiplatforms\u0026amp;fixids=9.2.0.2-CICSTG-PH72094-ZLNX\u0026amp;source=SAR\\\" rel=\\\"nofollow\\\"\u003ezLinux Link\u003c/a\u003e\u003c/p\u003e\u003cp\u003e\u003c/p\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003eCICS Transaction Gateway for Multiplatforms\u003c/td\u003e\u003ctd\u003e9.3.0.0\u003c/td\u003e\u003ctd\u003e\u003cp\u003ePH72094\u003c/p\u003e\u003c/td\u003e\u003ctd\u003e\u003cp\u003e\u003ca href=\\\"https://www.ibm.com/support/fixcentral/quickorder?product=ibm%2FWebSphere%2FCICS+Transaction+Gateway+for+Multiplatforms\u0026amp;fixids=9.3.0.0-CICSTG-PH72094-AIX\u0026amp;source=SAR\\\" rel=\\\"nofollow\\\"\u003eAIX Link\u003c/a\u003e\u003c/p\u003e\u003cp\u003e\u003ca href=\\\"https://www.ibm.com/support/fixcentral/quickorder?product=ibm%2FWebSphere%2FCICS+Transaction+Gateway+for+Multiplatforms\u0026amp;fixids=9.3.0.0-CICSTG-PH72094-PLXLE\u0026amp;source=SAR\\\" rel=\\\"nofollow\\\"\u003epLinux Little Endian Link\u003c/a\u003e\u003c/p\u003e\u003cp\u003e\u003ca href=\\\"https://www.ibm.com/support/fixcentral/quickorder?product=ibm%2FWebSphere%2FCICS+Transaction+Gateway+for+Multiplatforms\u0026amp;fixids=9.3.0.0-CICSTG-PH72094-PLNX\u0026amp;source=SAR\\\" rel=\\\"nofollow\\\"\u003epLinux Big Endian Link\u003c/a\u003e\u003c/p\u003e\u003cp\u003e\u003ca href=\\\"https://www.ibm.com/support/fixcentral/quickorder?product=ibm%2FWebSphere%2FCICS+Transaction+Gateway+for+Multiplatforms\u0026amp;fixids=9.3.0.0-CICSTG-PH72094-WIN\u0026amp;source=SAR\\\" rel=\\\"nofollow\\\"\u003eWindows Link\u003c/a\u003e\u003c/p\u003e\u003cp\u003e\u003ca href=\\\"https://www.ibm.com/support/fixcentral/quickorder?product=ibm%2FWebSphere%2FCICS+Transaction+Gateway+for+Multiplatforms\u0026amp;fixids=9.3.0.0-CICSTG-PH72094-ILNX\u0026amp;source=SAR\\\" rel=\\\"nofollow\\\"\u003eiLinux Link\u003c/a\u003e\u003c/p\u003e\u003cp\u003e\u003ca href=\\\"https://www.ibm.com/support/fixcentral/quickorder?product=ibm%2FWebSphere%2FCICS+Transaction+Gateway+for+Multiplatforms\u0026amp;fixids=9.3.0.0-CICSTG-PH72094-ZLNX\u0026amp;source=SAR\\\" rel=\\\"nofollow\\\"\u003ezLinux Link\u003c/a\u003e\u003c/p\u003e\u003cp\u003e\u003ca href=\\\"https://www.ibm.com/support/fixcentral/quickorder?product=ibm%2FWebSphere%2FCICS+Transaction+Gateway+for+Multiplatforms\u0026amp;fixids=9.3.0.0-CICSTG-PH72094-x86Container\u0026amp;source=SAR\\\" rel=\\\"nofollow\\\"\u003ex86 Container Link\u003c/a\u003e\u003c/p\u003e\u003cp\u003e\u003ca href=\\\"https://www.ibm.com/support/fixcentral/quickorder?product=ibm%2FWebSphere%2FCICS+Transaction+Gateway+for+Multiplatforms\u0026amp;fixids=9.3.0.0-CICSTG-PH72094-s390xContainer\u0026amp;source=SAR\\\" rel=\\\"nofollow\\\"\u003e390x Container Link\u003c/a\u003e\u003c/p\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003eCICS Transaction Gateway for Multiplatforms\u003c/td\u003e\u003ctd\u003e10.1.0.0\u003c/td\u003e\u003ctd\u003e\u003cp\u003ePH72095\u003c/p\u003e\u003c/td\u003e\u003ctd\u003e\u003cp\u003e\u003ca href=\\\"https://www.ibm.com/support/fixcentral/quickorder?product=ibm%2FWebSphere%2FCICS+Transaction+Gateway+for+Multiplatforms\u0026amp;fixids=10.1.0.0-CICSTG-PH72095-AIX\u0026amp;source=SAR\\\" rel=\\\"nofollow\\\"\u003eAIX Link\u003c/a\u003e\u003c/p\u003e\u003cp\u003e\u003ca href=\\\"https://www.ibm.com/support/fixcentral/quickorder?product=ibm%2FWebSphere%2FCICS+Transaction+Gateway+for+Multiplatforms\u0026amp;fixids=10.1.0.0-CICSTG-PH72095-PLXLE\u0026amp;source=SAR\\\" rel=\\\"nofollow\\\"\u003epLinux Little Endian Link\u003c/a\u003e\u003c/p\u003e\u003cp\u003e\u003ca href=\\\"https://www.ibm.com/support/fixcentral/quickorder?product=ibm%2FWebSphere%2FCICS+Transaction+Gateway+for+Multiplatforms\u0026amp;fixids=10.1.0.0-CICSTG-PH72095-WIN\u0026amp;source=SAR\\\" rel=\\\"nofollow\\\"\u003eWindows Link\u003c/a\u003e\u003c/p\u003e\u003cp\u003e\u003ca href=\\\"https://www.ibm.com/support/fixcentral/quickorder?product=ibm%2FWebSphere%2FCICS+Transaction+Gateway+for+Multiplatforms\u0026amp;fixids=10.1.0.0-CICSTG-PH72095-ILNX\u0026amp;source=SAR\\\" rel=\\\"nofollow\\\"\u003eiLinux Link\u003c/a\u003e\u003c/p\u003e\u003cp\u003e\u003ca href=\\\"https://www.ibm.com/support/fixcentral/quickorder?product=ibm%2FWebSphere%2FCICS+Transaction+Gateway+for+Multiplatforms\u0026amp;fixids=10.1.0.0-CICSTG-PH72095-ZLNX\u0026amp;source=SAR\\\" rel=\\\"nofollow\\\"\u003ezLinux Link\u003c/a\u003e\u003c/p\u003e\u003cp\u003e\u003ca href=\\\"https://www.ibm.com/support/fixcentral/quickorder?product=ibm%2FWebSphere%2FCICS+Transaction+Gateway+for+Multiplatforms\u0026amp;fixids=10.1.0.0-CICSTG-PH72095-x86Container\u0026amp;source=SAR\\\" rel=\\\"nofollow\\\"\u003ex86 Container Link\u003c/a\u003e\u003c/p\u003e\u003cp\u003e\u003ca href=\\\"https://www.ibm.com/support/fixcentral/quickorder?product=ibm%2FWebSphere%2FCICS+Transaction+Gateway+for+Multiplatforms\u0026amp;fixids=10.1.0.0-CICSTG-PH72095-s390xContainer\u0026amp;source=SAR\\\" rel=\\\"nofollow\\\"\u003e390x Container Link\u003c/a\u003e\u003c/p\u003e\u003c/td\u003e\u003c/tr\u003e\u003c/tbody\u003e\u003c/table\u003e\u003c/div\u003e\u003cp\u003e\u003c/p\u003e\", \"base64\": false}]}], \"references\": [{\"url\": \"https://www.ibm.com/support/pages/node/7281750\", \"tags\": [\"vendor-advisory\", \"patch\"]}], \"x_generator\": {\"engine\": \"ibm-cvegen\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"IBM CICS Transaction Gateway for Multiplatforms 9.1, 9.2, 9.3, and 10.1 IBM WebSphere Application Server 9.0, and 8.5 and IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.6 are affected by an HTTP request smuggling vulnerability.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cp\u003eIBM CICS Transaction Gateway for Multiplatforms 9.1, 9.2, 9.3, and 10.1 IBM WebSphere Application Server 9.0, and 8.5 and IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.6 are affected by an HTTP request smuggling vulnerability.\u003c/p\u003e\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-444\", \"description\": \"CWE-444 Inconsistent Interpretation of HTTP Requests (\u0027HTTP Request/Response Smuggling\u0027)\"}]}], \"providerMetadata\": {\"orgId\": \"9a959283-ebb5-44b6-b705-dcc2bbced522\", \"shortName\": \"ibm\", \"dateUpdated\": \"2026-07-29T18:12:49.178Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-11541\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-07-29T18:12:49.178Z\", \"dateReserved\": \"2026-06-08T02:55:08.653Z\", \"assignerOrgId\": \"9a959283-ebb5-44b6-b705-dcc2bbced522\", \"datePublished\": \"2026-06-30T20:56:04.135Z\", \"assignerShortName\": \"ibm\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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.