CVE-2026-20354

mediumPriorität · verfolgen · 24EPSS 0.002 · 10. PerzentilNLUS
grimoire priorityP3 · Track
Exploitable?
—
no known exploitation
Likely / severe?
0.20% (10th) EPSS
CVSS 5.9 · medium
Is it mine?
32 products
Prüfe deine Angriffsfläche
Who says so?
2 sources
cisco_csaf · ncsc_nl

EPSS · bewertet 2026-10-27

Multiple vulnerabilities in the Secure/Multipurpose Internet Mail Extensions (S/MIME) decryption functionality of Cisco Secure Email could allow an unauthenticated, remote attacker to recover plain text from encrypted email messages. These vulnerabilities are due to insufficient validation of message integrity. An attacker could exploit these vulnerabilities by using a machine-in-the-middle technique to intercept and modify traffic between email gateways. A successful exploit could allow the attacker to obtain plaintext content from the encrypted communication.

01

Behebungen

Hersteller-Fix, Mitigation oder Workaround, wie von den Quellen veröffentlicht.

Ein Hersteller-Fix ist verfügbar.

02

cvss

Technischer Schweregrad, 0–10. Eine Zeile je Quelle.

5.9
010

Basiswert 0–10 · höher = schwerwiegender · Vektor überfahren zum Auflösen

v3.15.9mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:Nprimary · psirt@cisco.com USAusnutzbarkeit 2.2 · Auswirkung 3.6
v3.15.4mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)
v3.15.9mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:Nsecondary · NCSC-NL NL
v3.15.9mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:Nsecondary · Cisco PSIRT US
03

schwächen

Die CWE-Schwächeklassen, zu denen dies gehört.

04

betroffene Produkte (32)

Betroffene Produkte und Versionsbereiche.

05

Advisories (2)

Hersteller- und Ökosystem-Meldungen dazu.

  • NCSC-2026-0338Kwetsbaarheden verholpen in Cisco Nexus 9000 Series, IOS XR Software en Secure EmailNL2026-09-03csaf · ncsc_nlNL

    Cisco heeft kwetsbaarheden verholpen in Cisco Nexus 9000 Series Switches met Silicon One technologie, Cisco IOS XR Software en Cisco Secure Email.

  • cisco-sa-esa-smime-disc-dzw4rEdYCisco Secure Email Secure/Multipurpose Internet Mail Extensions Ciphertext Decryption Vulnerabilities2026-09-02csaf · cisco_csafUS

    Multiple vulnerabilities in the Secure/Multipurpose Internet Mail Extensions (S/MIME) decryption functionality of Cisco Secure Email could allow an unauthenticated, remote attacker to recover plain text from encrypted email messages. These vulnerabilities are due to insufficient validation of message integrity. An attacker could exploit these vulnerabilities by using a machine-in-the-middle technique to intercept and modify traffic between email gateways. A successful exploit could allow the attacker to obtain plaintext content from the encrypted communication. There are no workarounds that address these vulnerabilities.

06

quellen

Welche Quellen diesen Datensatz belegen und wann.

veröffentlicht 2026-09-02geändert 2026-09-02
07

Referenzen (1) nvd

Externe Belege — Patches, Meldungen, Analysen.

scry

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