Vulnerability-Lookup

CVE-2026-20067 (GCVE-0-2026-20067)

Vulnerability from cvelistv5 – Published: 2026-03-04 17:49 – Updated: 2026-03-04 20:45

Title

Multiple Cisco Products Snort 3 TBD Denial of Service Vulnerability

Summary

Multiple Cisco products are affected by a vulnerability in the Snort 3 detection engine that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart, resulting in an interruption of packet inspection.  This vulnerability is due to incomplete error checking when parsing the Multicast DNS fields of the HTTP header. An attacker could exploit this vulnerability by sending crafted HTTP packets through an established connection to be parsed by Snort 3. A successful exploit could allow the attacker to cause a DoS condition when the Snort 3 Detection Engine unexpectedly restarts.

Severity ?

5.8 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L

CWE

CWE-787 - Out-of-bounds Write

Assigner

cisco

References

URL

GHSA-MW99-V56M-J965

Vulnerability from github – Published: 2026-03-04 18:31 – Updated: 2026-03-04 18:31

Details

This vulnerability is due to incomplete error checking when parsing the Multicast DNS fields of the HTTP header. An attacker could exploit this vulnerability by sending crafted HTTP packets through an established connection to be parsed by Snort 3. A successful exploit could allow the attacker to cause a DoS condition when the Snort 3 Detection Engine unexpectedly restarts.

Severity ?

5.8 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L

Show details on source website

JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-20067"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-787"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-03-04T18:16:21Z",
    "severity": "MODERATE"
  },
  "details": "Multiple Cisco products are affected by a vulnerability in the Snort 3 detection engine that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart, resulting in an interruption of packet inspection.\u0026nbsp;\n\nThis vulnerability is due to incomplete error checking when parsing the Multicast DNS fields of the HTTP header. An attacker could exploit this vulnerability by sending crafted HTTP packets through an established connection to be parsed by Snort 3. A successful exploit could allow the attacker to cause a DoS condition when the Snort 3 Detection Engine unexpectedly restarts.",
  "id": "GHSA-mw99-v56m-j965",
  "modified": "2026-03-04T18:31:55Z",
  "published": "2026-03-04T18:31:55Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-20067"
    },
    {
      "type": "WEB",
      "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort3-multi-dos-XFWkWSwz"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L",
      "type": "CVSS_V3"
    }
  ]
}

FKIE_CVE-2026-20067

Vulnerability from fkie_nvd - Published: 2026-03-04 18:16 - Updated: 2026-03-05 19:39

Severity ?

5.8 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L

Summary

References

	URL	Tags
	psirt@cisco.com	https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort3-multi-dos-XFWkWSwz

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Multiple Cisco products are affected by a vulnerability in the Snort 3 detection engine that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart, resulting in an interruption of packet inspection.\u0026nbsp;\r\n\r\nThis vulnerability is due to incomplete error checking when parsing the Multicast DNS fields of the HTTP header. An attacker could exploit this vulnerability by sending crafted HTTP packets through an established connection to be parsed by Snort 3. A successful exploit could allow the attacker to cause a DoS condition when the Snort 3 Detection Engine unexpectedly restarts."
    },
    {
      "lang": "es",
      "value": "M\u00faltiples productos Cisco se ven afectados por una vulnerabilidad en el motor de detecci\u00f3n de Snort 3 que podr\u00eda permitir a un atacante remoto no autenticado provocar el reinicio del motor de detecci\u00f3n de Snort 3, lo que resultar\u00eda en una interrupci\u00f3n de la inspecci\u00f3n de paquetes.\n\nEsta vulnerabilidad se debe a una comprobaci\u00f3n de errores incompleta al analizar los campos de Multicast DNS del encabezado HTTP. Un atacante podr\u00eda explotar esta vulnerabilidad enviando paquetes HTTP manipulados a trav\u00e9s de una conexi\u00f3n establecida para ser analizados por Snort 3. Un exploit exitoso podr\u00eda permitir al atacante causar una condici\u00f3n de DoS cuando el motor de detecci\u00f3n de Snort 3 se reinicia inesperadamente."
    }
  ],
  "id": "CVE-2026-20067",
  "lastModified": "2026-03-05T19:39:11.967",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "LOW",
          "baseScore": 5.8,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 1.4,
        "source": "psirt@cisco.com",
        "type": "Primary"
      }
    ]
  },
  "published": "2026-03-04T18:16:21.950",
  "references": [
    {
      "source": "psirt@cisco.com",
      "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort3-multi-dos-XFWkWSwz"
    }
  ],
  "sourceIdentifier": "psirt@cisco.com",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-787"
        }
      ],
      "source": "psirt@cisco.com",
      "type": "Primary"
    }
  ]
}

WID-SEC-W-2026-0608

Vulnerability from csaf_certbund - Published: 2026-03-04 23:00 - Updated: 2026-03-04 23:00

Summary

Cisco ASA (Adaptive Security Appliance), Secure Firewall Threat Defense, Cisco IOS XE und Cisco Meraki MX: Mehrere Schwachstellen ermöglichen Denial of Service

Severity

Mittel

Notes

Das BSI ist als Anbieter für die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch dafür verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgfältig im Einzelfall zu prüfen.

Produktbeschreibung: Snort ist ein freies Network Intrusion Prevention System (NIPS) und ein Network Intrusion Detection System (NIDS) der Firma Sourcefire. Die Cisco ASA Appliance bietet Funktionen zur Sicherung von Anwendungssoftware, wie beispielsweise Firewall oder VPN. Cisco Internetwork Operating System (IOS) ist ein Betriebssystem, das für Cisco Geräte wie z. B. Router und Switches eingesetzt wird. Die Cisco Meraki MX-Serie sind cloudverwaltete Sicherheits- und SD-WAN-Appliances Cisco Secure Firewall Threat Defense ist eine Sicherheitslösung, die Funktionen wie Firewall, Intrusion Prevention und erweiterten Malware-Schutz in einer einzigen Appliance integriert.

Angriff: Ein Angreifer kann mehrere Schwachstellen in Cisco ASA (Adaptive Security Appliance), Secure Firewall Threat Defense, Cisco IOS XE und Cisco Meraki MX ausnutzen, um einen Denial of Service Angriff durchzuführen.

Betroffene Betriebssysteme: - Sonstiges

CVE-2006-20005

CVE-2006-20065

CVE-2006-20067

CVE-2026-20005

CVE-2026-20053

CVE-2026-20054

CVE-2026-20057

CVE-2026-20058

CVE-2026-20065

CVE-2026-20066

CVE-2026-20067

CVE-2026-20068

References

URL

CISCO-SA-SNORT3-MULTI-DOS-XFWKWSWZ

Vulnerability from csaf_cisco - Published: 2026-03-04 16:00 - Updated: 2026-03-04 16:00

Summary

Multiple Cisco Products Snort 3 Denial of Service Vulnerabilities

Notes

Summary: Multiple Cisco products are affected by vulnerabilities in the Snort 3 Detection Engine that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart, resulting in an interruption of packet inspection. For more information about these vulnerabilities, see the Details ["#details"] section of this advisory. Cisco has released software updates that address these vulnerabilities. There are no workarounds that address these vulnerabilities. This advisory is part of the March 2026 release of the Cisco Secure Firewall ASA, Secure FMC, and Secure FTD Software Security Advisory Bundled Publication. For a complete list of the advisories and links to them, see Cisco Event Response: March 2026 Semiannual Cisco Secure Firewall ASA, Secure FMC, and Secure FTD Software Security Advisory Bundled Publication ["https://sec.cloudapps.cisco.com/security/center/viewErp.x?alertId=ERP-75736"].

Vulnerable Products: For information about which products were affected by these vulnerabilities at the time of publication, see the following sections. Open Source Snort 3 At the time of publication, these vulnerabilities affected Open Source Snort 3. For information about which Snort releases were vulnerable at the time of publication, see the Fixed Software ["#fs"] section of this advisory. For more information on Snort, see the Snort website ["https://www.snort.org/"]. Cisco Secure Firewall Threat Defense Software At the time of publication, these vulnerabilities affected Cisco Secure Firewall Threat Defense (FTD) Software if Snort 3 was configured. For information about which Cisco software releases are vulnerable, see the Fixed Software ["#fs"] section of this advisory. Determine the Snort Configuration on Cisco Secure FTD Software On new installations of Cisco Secure FTD Software releases 7.0.0 and later, Snort 3 is running by default. On devices that were running Cisco Secure FTD Software Release 6.7.0 or earlier and were upgraded to Release 7.0.0 or later, Snort 2 is running by default. To determine if Snort 3 is running on Cisco Secure FTD Software, see Determine the Active Snort Version that Runs on Firepower Threat Defense (FTD) ["https://www.cisco.com/c/en/us/support/docs/security/secure-firewall-threat-defense/220415-determine-the-active-snort-version-that.html"]. Snort 3 has to be active for these vulnerabilities to be exploited. Cisco IOS XE Software At the time of publication, this vulnerability affected the following Cisco products if they were running a vulnerable release of Unified Threat Defense (UTD) Snort IPS Engine for Cisco IOS XE Software or UTD Engine for Cisco IOS XE SD-WAN Software: 1000 Series Integrated Services Routers (ISRs) 4000 Series ISRs 8100 Series Secure Routers 8200 Series Secure Routers 8300 Series Secure Routers 8400 Series Secure Routers Catalyst 8000V Edge Software Catalyst 8200 Series Edge Platforms Catalyst 8300 Series Edge Platforms Catalyst 8500L Edge Platforms Catalyst IR1800 Rugged Series Routers Catalyst IR8340 Rugged Routers Cloud Services Routers 1000V Integrated Services Virtual Routers Note: UTD is not installed on these devices by default. If the UTD file is not installed, the device is not affected by these vulnerabilities. For information about which Cisco software releases were vulnerable at the time of publication, see the Fixed Software ["#fs"] section of this advisory. See the Details section in the bug ID(s) at the top of this advisory for the most complete and current information. Determine Whether UTD Is Enabled To determine whether UTD is enabled on a device, use the show utd engine standard status command. If the output shows a Yes under Running, UTD is enabled. If there is no output, the device is not affected. The following example shows the output on a device that has UTD enabled: Router# show utd engine standard status Engine version : 1.0.19_SV2.9.16.1_XE17.3 Profile : Cloud-Low System memory : Usage : 6.00 % Status : Green Number of engines : 1 Engine Running Health Reason =========================================== Engine(#1): Yes Green None ======================================================= . . . Impact to Cisco Meraki Products At the time of publication, the vulnerability that is described in CVE-2026-20005 affected the following products if they were running a vulnerable release of Meraki Software: MX64 MX64W MX65 MX65W MX67 MX67C MX67W MX68 MX68CW MX75 MX84 MX85 MX95 MX100 MX105 MX250 MX400 MX450 MX600 Impact to Other Cisco Products At the time of publication, the vulnerabilities that are described in CVE-2026-20005, CVE-2026-20067, and CVE-2026-20068 affected Cisco Cyber Vision. For information about which Cisco software releases were vulnerable at the time of publication, see the Fixed Software ["#fs"] section of this advisory. See the Details section in the bug ID(s) at the top of this advisory for the most complete and current information.

Products Confirmed Not Vulnerable: Only products listed in the Vulnerable Products ["#vp"] section of this advisory are known to be affected by these vulnerabilities. Cisco also has confirmed that these vulnerabilities do not affect the following products: Cisco Secure Access Secure Internet Access (SIA) Advantage Cisco Secure Access Secure Private Access (SPA) Advantage Cisco Secure Firewall Adaptive Security Appliance (ASA) Software Cisco Secure Firewall Management Center (FMC) Software Cisco Umbrella Cloud-delivered Firewall (CDFW), formerly Umbrella Secure Internet Gateway (SIG) Open Source Snort 2 Cisco has confirmed that CVE-2026-20065, CVE-2026-20066, CVE-2026-20067, and CVE-2026-20068 do not affect Cisco Meraki products. Cisco has also confirmed that CVE-2026-20065 and CVE-2026-20066 do not affect Cisco Cyber Vision.

Details: The vulnerabilities are not dependent on one another. Exploitation of one of the vulnerabilities is not required to exploit another vulnerability. In addition, a software release that is affected by one of the vulnerabilities may not be affected by the other vulnerabilities. Details about the vulnerabilities are as follows: CVE-2026-20005: Multiple Cisco Products Snort 3 SSL Denial of Service Vulnerability Multiple Cisco products are affected by a vulnerability in the Snort 3 Detection Engine that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart, resulting in an interruption of packet inspection. This vulnerability is due to incomplete parsing of the SSL handshake ingress packets by the Snort 3 Detection Engine. An attacker could exploit this vulnerability by sending crafted SSL handshake packets. A successful exploit could allow the attacker to cause a denial of service (DoS) condition when the Snort 3 Detection Engine restarts unexpectedly. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. Bug ID(s): CSCwn65473 ["https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwn65473"] and CSCwp99280 ["https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwp99280"] CVE ID: CVE-2026-20005 Security Impact Rating (SIR): Medium CVSS Base Score: 5.8 CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L CVE-2026-20065: Multiple Cisco Products Snort 3 Binder DoS Vulnerability Multiple Cisco products are affected by a vulnerability in the Snort 3 Detection Engine that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart, resulting in an interruption of packet inspection. This vulnerability is due to an error in the binder module initialization logic of the Snort Detection Engine. An attacker could exploit this vulnerability by sending certain packets through an established connection that is parsed by Snort 3. A successful exploit could allow the attacker to cause a DoS condition when the Snort 3 Detection Engine restarts unexpectedly. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. Bug ID(s): CSCwn49805 ["https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwn49805"] CVE ID: CVE-2026-20065 Security Impact Rating (SIR): Medium CVSS Base Score: 5.8 CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L CVE-2026-20066: Multiple Cisco Products Snort 3 JSTokenizer DoS Vulnerability Multiple Cisco products are affected by a vulnerability in the Snort 3 Detection Engine that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart, resulting in an interruption of packet inspection. This vulnerability is due to an error in the JSTokenizer normalization logic when the HTTP inspection normalizes JavaScript. An attacker could exploit this vulnerability by sending crafted HTTP packets through an established connection that is parsed by Snort 3. A successful exploit could allow the attacker to cause a DoS condition when the Snort 3 Detection Engine restarts unexpectedly. JSTokenizer is not enabled by default. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. Bug ID(s): CSCwq23374 ["https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwq23374"] CVE ID: CVE-2026-20066 Security Impact Rating (SIR): Medium CVSS Base Score: 5.8 CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L CVE-2026-20067: Multiple Cisco Products Snort 3 Multicast DNS DoS Vulnerability Multiple Cisco products are affected by a vulnerability in the Snort 3 detection engine that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart, resulting in an interruption of packet inspection. This vulnerability is due to incomplete error checking when parsing the Multicast DNS fields of the HTTP header. An attacker could exploit this vulnerability by sending crafted HTTP packets through an established connection to be parsed by Snort 3. A successful exploit could allow the attacker to cause a DoS condition when the Snort 3 Detection Engine unexpectedly restarts. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. Bug ID(s): CSCwq01530 ["https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwq01530"] CVE ID: CVE-2026-20067 Security Impact Rating (SIR): Medium CVSS Base Score: 5.8 CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L CVE-2026-20068: Multiple Cisco Products Snort 3 RPC DoS Vulnerability Multiple Cisco products are affected by a vulnerability in the Snort 3 detection engine that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart, resulting in an interruption of packet inspection. This vulnerability is due to incomplete error checking when parsing remote procedure call (RPC) data. An attacker could exploit this vulnerability by sending crafted RPC packets through an established connection to be parsed by Snort 3. A successful exploit could allow the attacker to cause a DoS condition when the Snort 3 Detection Engine unexpectedly restarts. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. Bug ID(s): CSCwq01529 ["https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwq01529"] CVE ID: CVE-2026-20068 Security Impact Rating (SIR): Medium CVSS Base Score: 5.8 CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L

Workarounds: There are no workarounds that address these vulnerabilities.

Fixed Software: Cisco considers any workarounds and mitigations (if applicable) to be temporary solutions until an upgrade to a fixed software release is available. To fully remediate these vulnerabilities and avoid future exposure as described in this advisory, Cisco strongly recommends that customers upgrade to the fixed software indicated in this advisory. Fixed Releases For information about fixed releases, see the following sections. Open Source Snort Software At the time of publication, the release information in the following table was accurate. Snort 3 Release First Fixed Release for CVE-2026-20005 and CVE-2026-20068 First Fixed Release for CVE-2026-20065 First Fixed Release for CVE-2026-20066 First Fixed Release for CVE-2026-20067 3.x 3.9.2.0 and later 3.6.3.0 and later 3.9.7.0 and later 3.9.5.0 and later Cisco Secure Firewall ASA, Secure FMC, and Secure FTD Software To help customers determine their exposure to vulnerabilities in Cisco Secure Firewall ASA, Secure FMC, and Secure FTD Software, Cisco provides the Cisco Software Checker ["https://sec.cloudapps.cisco.com/security/center/softwarechecker.x"]. This tool identifies any Cisco security advisories that impact a specific software release and the earliest release that fixes the vulnerabilities that are described in each advisory (“First Fixed”). If applicable, the tool also returns the earliest release that fixes all the vulnerabilities that are described in all the advisories that the Software Checker identifies (“Combined First Fixed”). To use the tool, go to the Cisco Software Checker ["https://sec.cloudapps.cisco.com/security/center/softwarechecker.x"] page and follow the instructions. Alternatively, use the following form to search for vulnerabilities that affect a specific software release. To use the form, follow these steps: Choose which advisories the tool will search—all advisories, only advisories with a Critical or High Security Impact Rating (SIR) ["https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html#asr"], or only this advisory. Choose the appropriate software. Choose the appropriate platform. Enter a release number—for example, 9.20.3.4 for Cisco Secure Firewall ASA Software or 7.4.2 for Cisco Secure FTD Software. Click Check. Only this advisory All Critical and High advisories All advisories Cisco ASA Software Cisco FMC Software Cisco FTD Software Any Platform 3000 Series Industrial Security Appliances (ISA) ASA 5500-X Series Firewalls ASA Service Module Adaptive Security Virtual Appliance (ASAv) Firepower 1000 Series Firepower 2100 Series Firepower 4100 Series Firepower 9000 Series Firepower NGFW Virtual Secure Firewall 1200 Series Secure Firewall 3100 Series Secure Firewall 4200 Series Firepower Management Center Appliances Additional Resources For help determining the best Cisco Secure Firewall ASA, Secure FMC, or Secure FTD Software release, see the following Recommended Releases documents. If a security advisory recommends a later release, Cisco recommends following the advisory guidance. Cisco Secure Firewall ASA Compatibility ["https://www.cisco.com/c/en/us/td/docs/security/asa/compatibility/asamatrx.html"] Cisco Secure Firewall ASA Upgrade Guide ["https://www.cisco.com/c/en/us/td/docs/security/asa/upgrade/asa-upgrade/planning.html"] Cisco Secure Firewall Threat Defense Compatibility Guide ["https://www.cisco.com/c/en/us/td/docs/security/secure-firewall/compatibility/threat-defense-compatibility.html"] Other Platforms At the time of publication, the release information in the following tables was accurate. The left column lists Cisco software releases, and the right column indicates whether a release was affected by the vulnerabilities that are described in this advisory and which release included the fix for these vulnerabilities. Meraki MX Security Appliances Snort is integrated natively into Cisco Meraki security appliances as part of the threat protection services that are managed automatically through the Meraki Dashboard. No customer action is required to download Meraki firmware or the Snort 3 package for Meraki devices. As of February 5, 2026, all Meraki models listed in this advisory that are online and connected to the Cisco Meraki Dashboard have been automatically updated with the Snort 3 package, which fixes all vulnerabilities in Snort 3 for the February 2026 Cisco Secure Firewall ASA, Secure FMC, and Secure FTD Software Security Advisory Bundled Publication. UTD Software: CSCwo93207 ["https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwo93207"], CSCwq82404 ["https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwq82404"], CSCwr21398 ["https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwr21398"], CSCwq97644 ["https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwq97644"], CSCwq97624 ["https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwq97624"] Cisco IOS XE Software Release First Fixed Release Earlier than 17.12 Not vulnerable. 17.12 17.12.7 (Mar 2026) 17.15 17.15.5 17.18 17.18.3 (Apr 2026) 26.1 26.1.1 (Mar 2026) Cyber Vision: CSCwo93208 ["https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwo93208"], CSCwq97649 ["https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwq97649"], CSCwq03411 ["https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwq03411"] Cisco Cyber Vision Release First Fixed Release for CVE-2026-20005, CVE-2026-20067, and CVE-2026-20068 Earlier than 5.3 Migrate to a fixed release. 5.3 5.3.3 The Cisco Product Security Incident Response Team (PSIRT) validates only the affected and fixed release information that is documented in this advisory.

Vulnerability Policy: To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy ["http://www.cisco.com/web/about/security/psirt/security_vulnerability_policy.html"]. This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco.

Exploitation and Public Announcements: The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerabilities that are described in this advisory.

Source: CVE-2026-20005 and CVE-2026-20065: These vulnerabilities were found during the resolution of a Cisco Technical Assistance Center (TAC) support case. CVE-2026-20066, CVE-2026-20067, and CVE-2026-20068: These vulnerabilities were found during internal security testing by Jason Crowder of the Cisco Advanced Security Initiatives Group (ASIG).

Legal Disclaimer: SOFTWARE DOWNLOADS AND TECHNICAL SUPPORT The Cisco Support and Downloads ["https://www.cisco.com/c/en/us/support/index.html"] page on Cisco.com provides information about licensing and downloads. This page can also display customer device support coverage for customers who use the My Devices tool. Please note that customers may download only software that was procured from Cisco directly or through a Cisco authorized reseller or partner and for which the license is still valid. Customers who purchase directly from Cisco but do not hold a Cisco service contract and customers who make purchases through third-party vendors but are unsuccessful in obtaining fixed software through their point of sale should obtain upgrades by contacting the Cisco Technical Assistance Center (TAC) ["https://www.cisco.com/c/en/us/support/web/tsd-cisco-worldwide-contacts.html"]. Customers should have the product serial number available and be prepared to provide the URL of this advisory as evidence of entitlement to a free upgrade. When considering software upgrades ["https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html#fixes"], customers are advised to regularly consult the advisories ["https://www.cisco.com/go/psirt"] for the relevant Cisco products to determine exposure and a complete upgrade solution. In all cases, customers should ensure that the devices to be upgraded contain sufficient memory and confirm that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, customers are advised to contact the Cisco Technical Assistance Center (TAC) ["https://www.cisco.com/c/en/us/support/web/tsd-cisco-worldwide-contacts.html"] or their contracted maintenance providers. LEGAL DISCLAIMER DETAILS CISCO DOES NOT MAKE ANY EXPRESS OR IMPLIED GUARANTEES OR WARRANTIES OF ANY KIND, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. WITHOUT LIMITING THE GENERALITY OF THE FOREGOING, CISCO DOES NOT GUARANTEE THE ACCURACY OR COMPLETENESS OF THIS INFORMATION. THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME. Copies or summaries of the information contained in this Security Advisory may lack important information or contain factual errors. Customers are advised to visit the Cisco Security Advisories ["https://www.cisco.com/go/psirt"] page for the most recent version of this Security Advisory. The Cisco Product Security Incident Response Team (PSIRT) assesses only the affected and fixed release information that is documented in this advisory. See the Cisco Security Vulnerability Policy ["https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html#fixes"] for more information.

CVE-2026-20005

5.8 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L