Cisco Secure Email
Monthly
Plaintext recovery from S/MIME-encrypted email is possible in Cisco Secure Email due to insufficient message integrity validation during decryption. An unauthenticated remote attacker positioned as a machine-in-the-middle between email gateways can intercept and manipulate ciphertext, exploiting the CWE-345 flaw to extract plaintext content from messages that senders believed were encrypted end-to-end. No public exploit code or CISA KEV listing has been identified at time of analysis, and the AC:H vector reflects the non-trivial MITM positioning requirement.
Plaintext recovery from S/MIME-encrypted email is possible in Cisco Secure Email due to insufficient validation of message integrity during decryption. An unauthenticated remote attacker who achieves a machine-in-the-middle position between email gateways can intercept and manipulate encrypted messages in transit, causing the decryption process to yield recoverable plaintext. No public exploit code or active exploitation has been identified at time of analysis, but confidentiality impact is rated High given complete plaintext disclosure.
Plaintext recovery from S/MIME-encrypted email is possible in Cisco Secure Email due to insufficient message integrity validation during decryption. An unauthenticated remote attacker positioned as a machine-in-the-middle between email gateways can intercept and manipulate ciphertext, exploiting the CWE-345 flaw to extract plaintext content from messages that senders believed were encrypted end-to-end. No public exploit code or CISA KEV listing has been identified at time of analysis, and the AC:H vector reflects the non-trivial MITM positioning requirement.
Plaintext recovery from S/MIME-encrypted email is possible in Cisco Secure Email due to insufficient validation of message integrity during decryption. An unauthenticated remote attacker who achieves a machine-in-the-middle position between email gateways can intercept and manipulate encrypted messages in transit, causing the decryption process to yield recoverable plaintext. No public exploit code or active exploitation has been identified at time of analysis, but confidentiality impact is rated High given complete plaintext disclosure.