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CVE-2026-20323

🗓️ 16 Sep 2026 20:15:35Reported by ciscoType 
cve
 cve🔗 web.nvd.nist.gov👁 45 Views

Unauthenticated root access in Cisco Secure FMC/FTD sftunnel via crafted TLS certificate.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
bdu_fstec
BDU FSTEC		The vulnerability of the Cisco Secure Firewall Management Center (formerly known as Cisco Firepower Management Center) and the Cisco Secure Firewall Threat Defense (FTD) software lies in errors related to the authentication process. These errors allow attackers to bypass existing security mechanisms or cause service interruptions.
23 Sep 202600:00
–bdu_fstec
cisco
Cisco		Cisco Secure Firewall Management Center and Secure Firewall Threat Defense Software sftunnel Vulnerabilities
16 Sep 202616:00
–cisco
nessus
Tenable Nessus		Cisco Secure Firewall Threat Defense Software sftunnel Authentication Bypass (cisco-sa-fmcftd-sftun-multivulns-WGVHOrN3)
18 Sep 202600:00
–nessus
nessus
Tenable Nessus		Cisco Secure Firewall Management Center Software sftunnel Authentication Bypass (cisco-sa-fmcftd-sftun-multivulns-WGVHOrN3)
18 Sep 202600:00
–nessus
cvelist
Cvelist		CVE-2026-20323 Cisco Secure Firewall Management Center and Secure Firewall Threat Defense Software sftunnel Unauthorized Authentication Bypass Vulnerability
16 Sep 202620:15
–cvelist
euvd
EUVD		EUVD-2026-81139
16 Sep 202620:15
–euvd
nvd
NVD		CVE-2026-20323
16 Sep 202621:17
–nvd
ptsecurity
Positive Technologies		PT-2026-93979
16 Sep 202600:00
–ptsecurity
rapid7
Rapid7 Vulnerability Database (full)		CVE-2026-20323: Improper Certificate Validation
16 Sep 202600:00
–rapid7
vulnrichment
Vulnrichment		CVE-2026-20323 Cisco Secure Firewall Management Center and Secure Firewall Threat Defense Software sftunnel Unauthorized Authentication Bypass Vulnerability
16 Sep 202620:15
–vulnrichment
[
  {
    "vendor": "Cisco",
    "product": "Cisco Secure Firewall Management Center (FMC)",
    "versions": [
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        "version": "7.0.0",
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      {
        "version": "7.0.0.1",
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        "version": "7.0.1",
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        "version": "7.0.1.1",
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      {
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        "version": "7.3.1",
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      {
        "version": "7.2.3",
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      {
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        "version": "7.2.5.1",
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      {
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        "version": "7.0.6.3",
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        "version": "7.4.6",
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      {
        "version": "10.0.1",
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      {
        "version": "7.4.7",
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      {
        "version": "7.0.10",
        "status": "affected"
      }
    ],
    "defaultStatus": "unknown"
  },
  {
    "vendor": "Cisco",
    "product": "Cisco Secure Firewall Threat Defense (FTD) Software",
    "versions": [
      {
        "version": "7.0.0",
        "status": "affected"
      },
      {
        "version": "7.0.0.1",
        "status": "affected"
      },
      {
        "version": "7.0.1",
        "status": "affected"
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      {
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        "version": "7.0.5",
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      {
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        "status": "affected"
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        "version": "7.2.5",
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        "version": "7.2.4.1",
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        "version": "7.0.6.1",
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      {
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      },
      {
        "version": "7.4.1.1",
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      },
      {
        "version": "7.2.7",
        "status": "affected"
      },
      {
        "version": "7.2.5.2",
        "status": "affected"
      },
      {
        "version": "7.3.1.2",
        "status": "affected"
      },
      {
        "version": "7.2.8",
        "status": "affected"
      },
      {
        "version": "7.6.0",
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      },
      {
        "version": "7.4.2",
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      },
      {
        "version": "7.2.8.1",
        "status": "affected"
      },
      {
        "version": "7.0.6.3",
        "status": "affected"
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      {
        "version": "7.4.2.1",
        "status": "affected"
      },
      {
        "version": "7.2.9",
        "status": "affected"
      },
      {
        "version": "7.0.7",
        "status": "affected"
      },
      {
        "version": "7.7.0",
        "status": "affected"
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      {
        "version": "7.4.2.2",
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      },
      {
        "version": "7.2.10",
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      },
      {
        "version": "7.6.1",
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      {
        "version": "7.4.2.3",
        "status": "affected"
      },
      {
        "version": "7.0.8",
        "status": "affected"
      },
      {
        "version": "7.6.2",
        "status": "affected"
      },
      {
        "version": "7.7.10",
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      },
      {
        "version": "7.7.11",
        "status": "affected"
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      {
        "version": "7.0.8.1",
        "status": "affected"
      },
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        "version": "7.6.2.1",
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      {
        "version": "7.7.10.1",
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      },
      {
        "version": "7.4.2.4",
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      },
      {
        "version": "7.2.10.2",
        "status": "affected"
      },
      {
        "version": "7.4.3",
        "status": "affected"
      },
      {
        "version": "7.6.4",
        "status": "affected"
      },
      {
        "version": "10.0.0",
        "status": "affected"
      },
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        "version": "7.4.4",
        "status": "affected"
      },
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        "version": "7.0.9",
        "status": "affected"
      },
      {
        "version": "7.2.11",
        "status": "affected"
      },
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        "version": "7.4.7",
        "status": "affected"
      },
      {
        "version": "7.0.10",
        "status": "affected"
      }
    ],
    "defaultStatus": "unknown"
  }
]

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18 Sep 2026 13:28Current
7.7High risk
Vulners AI Score7.7
CVSS 3.18.3
EPSS0.00089
SSVC
CWE-295
Cisco Secure Firewallsftunnelauthentication bypassTLS certificateroot access
45