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CVE-2026-20355

Опубликовано: 02 сент. 2026
Источник: nvd
CVSS3: 5.9
EPSS Низкий

Описание

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.

EPSS

Процентиль: 4%
0.00149
Низкий

5.9 Medium

CVSS3

Дефекты

CWE-345

Связанные уязвимости

CVSS3: 5.9
github
19 дней назад

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.

EPSS

Процентиль: 4%
0.00149
Низкий

5.9 Medium

CVSS3

Дефекты

CWE-345