WID-SEC-W-2026-3156

Vulnerability from csaf_certbund - Published: 2026-09-02 22:00 - Updated: 2026-09-02 22:00
Summary
Cisco Secure Email Gateway: Mehrere Schwachstellen ermöglichen Umgehen von Sicherheitsvorkehrungen
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: Cisco AsyncOS ist ein Betriebssystem für Cisco Appliances. Das Cisco Secure Email Gateway ist eine Sicherheitslösung zum Schutz der E-Mail Kommunikation.
Angriff: Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Cisco AsyncOS und Cisco Secure Email Gateway ausnutzen, um Sicherheitsvorkehrungen zu umgehen.
Betroffene Betriebssysteme: - CISCO Appliance
CVE-2026-20354
Affected products
Product Identifier Version Remediation
Cisco Secure Email Gateway
Cisco
 cpe:/h:cisco:secure_email_gateway:- —
Product Identifier Version Remediation
Cisco AsyncOS <=16.5.0
Cisco / AsyncOS
 <=16.5.0
CVE-2026-20355
Affected products
Known affected 1 product, the same list as for CVE-2026-20354
Last affected 1 product, the same list as for CVE-2026-20354
References
To clipboard 

{
  "document": {
    "aggregate_severity": {
      "text": "mittel"
    },
    "category": "csaf_base",
    "csaf_version": "2.0",
    "distribution": {
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "de-DE",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "Das BSI ist als Anbieter f\u00fcr die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch daf\u00fcr verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgf\u00e4ltig im Einzelfall zu pr\u00fcfen."
      },
      {
        "category": "description",
        "text": "Cisco AsyncOS ist ein Betriebssystem f\u00fcr Cisco Appliances.\r\nDas Cisco Secure Email Gateway ist eine Sicherheitsl\u00f6sung zum Schutz der E-Mail Kommunikation.",
        "title": "Produktbeschreibung"
      },
      {
        "category": "summary",
        "text": "Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Cisco AsyncOS und Cisco Secure Email Gateway ausnutzen, um Sicherheitsvorkehrungen zu umgehen.",
        "title": "Angriff"
      },
      {
        "category": "general",
        "text": "- CISCO Appliance",
        "title": "Betroffene Betriebssysteme"
      }
    ],
    "publisher": {
      "category": "other",
      "contact_details": "csaf-provider@cert-bund.de",
      "name": "Bundesamt f\u00fcr Sicherheit in der Informationstechnik",
      "namespace": "https://www.bsi.bund.de"
    },
    "references": [
      {
        "category": "self",
        "summary": "WID-SEC-W-2026-3156 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-3156.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2026-3156 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-3156"
      },
      {
        "category": "external",
        "summary": "Cisco Security Advisory cisco-sa-esa-smime-disc-dzw4rEdY vom 2026-09-02",
        "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-esa-smime-disc-dzw4rEdY"
      }
    ],
    "source_lang": "en-US",
    "title": "Cisco Secure Email Gateway: Mehrere Schwachstellen erm\u00f6glichen Umgehen von Sicherheitsvorkehrungen",
    "tracking": {
      "current_release_date": "2026-09-02T22:00:00.000+00:00",
      "generator": {
        "date": "2026-09-03T11:26:12.082+00:00",
        "engine": {
          "name": "BSI-WID",
          "version": "1.6.0"
        }
      },
      "id": "WID-SEC-W-2026-3156",
      "initial_release_date": "2026-09-02T22:00:00.000+00:00",
      "revision_history": [
        {
          "date": "2026-09-02T22:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c=16.5.0",
                "product": {
                  "name": "Cisco AsyncOS \u003c=16.5.0",
                  "product_id": "T059007"
                }
              },
              {
                "category": "product_version_range",
                "name": "\u003c=16.5.0",
                "product": {
                  "name": "Cisco AsyncOS \u003c=16.5.0",
                  "product_id": "T059007-fixed"
                }
              }
            ],
            "category": "product_name",
            "name": "AsyncOS"
          },
          {
            "category": "product_name",
            "name": "Cisco Secure Email Gateway",
            "product": {
              "name": "Cisco Secure Email Gateway",
              "product_id": "T049501",
              "product_identification_helper": {
                "cpe": "cpe:/h:cisco:secure_email_gateway:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Cisco"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-20354",
      "product_status": {
        "known_affected": [
          "T049501"
        ],
        "last_affected": [
          "T059007"
        ]
      },
      "release_date": "2026-09-02T22:00:00.000+00:00",
      "title": "CVE-2026-20354"
    },
    {
      "cve": "CVE-2026-20355",
      "product_status": {
        "known_affected": [
          "T049501"
        ],
        "last_affected": [
          "T059007"
        ]
      },
      "release_date": "2026-09-02T22:00:00.000+00:00",
      "title": "CVE-2026-20355"
    }
  ]
}



Log in or create an account to share your comment.




Tags
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.



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.