CVE-2019-16905High· 7.8▾ TwilightOpenSSH 7.7 through 7.9 and 8.x before 8.1, when compiled with an experimental key type, has a pre-authentication integer overflow if a client or server is configured to use a crafted XMSS key. This leads to memory corruption and local c…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 42.9 · likelihood 0.4 · exploitation 0
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Exploit-prediction probability, daily snapshots since Oct 14.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Last analysed / modified upstream
2.2%
2.2% → 2.2%
OpenSSH 7.7 through 7.9 and 8.x before 8.1, when compiled with an experimental key type, has a pre-authentication integer overflow if a client or server is configured to use a crafted XMSS key. This leads to memory corruption and local code execution because of an error in the XMSS key parsing algorithm. NOTE: the XMSS implementation is considered experimental in all released OpenSSH versions, and there is no supported way to enable it when building portable OpenSSH.
openssh >= 7.7, <= 7.9openssh >= 8.0, < 8.1cloud_backupsteelstore_cloud_integrated_storagescalance_x204rna_firmware < 3.2.7scalance_x204rna_ecc_firmware < 3.2.7Upgrade past the affected range:
openssh 8.1scalance_x204rna_firmware 3.2.7scalance_x204rna_ecc_firmware 3.2.7Connected by shared product, vendor, weakness, or advisory.
CVE-2019-6109Medium· 6.8An issue was discovered in OpenSSH 7.9
CVE-2019-6110Medium· 6.8In OpenSSH 7.9, due to accepting and displaying arbitrary stderr output from the server, a malicious server (or Man-in-The-Middle attacker) can manipulate the client output, for example to use ANSI control codes to hide additional files …
CVE-2019-6111Medium· 5.9An issue was discovered in OpenSSH 7.9
CVE-2025-32728Medium· 4.3In sshd in OpenSSH before 10.0, the DisableForwarding directive does not adhere to the documentation stating that it disables X11 and agent forwarding.
CVE-2023-38408Critical· 9.8The PKCS#11 feature in ssh-agent in OpenSSH before 9.3p2 has an insufficiently trustworthy search path, leading to remote code execution if an agent is forwarded to an attacker-controlled system
CVE-2023-25136Medium· 6.5OpenSSH server (sshd) 9.1 introduced a double-free vulnerability during options.kex_algorithms handling