SSH vulnerabilitiesNone on the known-exploited list.
SSH has 47 published vulnerabilities across 13 products in our catalogue. None of them is on the list of flaws known to be exploited today. The most affected product is SSH, with 23. If you run SSH software, patch the exploited flaws first.
We keep watching the known-exploited list.
Which SSH products have the most vulnerabilities?
SSH leads with 23 published vulnerabilities. Open a product to see its versions and which of its flaws criminals are already using.
Which SSH vulnerabilities are being exploited?
This is the list that matters most: flaws criminals are using now.
None of SSH's published vulnerabilities is on the list of flaws known to be exploited today. We keep watching that list.
Which SSH flaws are most likely to be used?
Ranked by the latest exploit-likelihood forecast: the chance each flaw is used in an attack in the next 30 days. A high severity score on its own doesn't tell you that. Flaws shared by many other makers' products are left out.
- 94%CVE-2023-48795Medium
The SSH transport protocol with certain OpenSSH extensions, found in OpenSSH before 9.6 and other products, allows remote attackers to bypass integrity checks such that some packets are omitted (from the extension...
- 36%CVE-2012-5975Critical
The SSH USERAUTH CHANGE REQUEST feature in SSH Tectia Server 6.0.4 through 6.0.20, 6.1.0 through 6.1.12, 6.2.0 through 6.2.5, and 6.3.0 through 6.3.2 on UNIX and Linux, when old-style password authentication is...
- 32%CVE-2001-0144Critical
CORE SDI SSH1 CRC-32 compensation attack detector allows remote attackers to execute arbitrary commands on an SSH server or client via an integer overflow.
- 7.9%CVE-2002-1645Critical
Buffer overflow in the URL catcher feature for SSH Secure Shell for Workstations client 3.1 to 3.2.0 allows remote attackers to execute arbitrary code via a long URL.
- 7.1%CVE-2001-0572High
The SSH protocols 1 and 2 (aka SSH-2) as implemented in OpenSSH and other packages have various weaknesses which can allow a remote attacker to obtain the following information via sniffing: (1) password lengths or...
- 6.3%CVE-2001-1473High
The SSH-1 protocol allows remote servers to conduct man-in-the-middle attacks and replay a client challenge response to a target server by creating a Session ID that matches the Session ID of the target, but which...
- 6.0%CVE-2000-0992Medium
Directory traversal vulnerability in scp in sshd 1.2.xx allows a remote malicious scp server to overwrite arbitrary files via a ..
- 5.6%CVE-2001-0471High
SSH daemon version 1 (aka SSHD-1 or SSH-1) 1.2.30 and earlier does not log repeated login attempts, which could allow remote attackers to compromise accounts without detection via a brute force attack.
- 3.6%CVE-2002-1646High
SSH Secure Shell for Servers 3.0.0 to 3.1.1 allows remote attackers to override the AllowedAuthentications configuration and use less secure authentication schemes (e.g.
All SSH products we track.
12 products, most vulnerabilities first. Find the ones you run, then open a product to see its versions and exploited flaws.
- SSHssh23 vulnerabilities32 versions
- Tectia Servertectia_server12 vulnerabilities115 versions
- Ssh2ssh29 vulnerabilities28 versions
- Tectia Clienttectia_client7 vulnerabilities81 versions
- Tectia Connectsecuretectia_connectsecure4 vulnerabilities5 versions
- Secure Shellsecure_shell3 vulnerabilities5 versions
- Tectia Connectortectia_connector3 vulnerabilities31 versions
- Tectia Managertectia_manager3 vulnerabilities7 versions
- Privxprivx1 vulnerability27 versions
- Secure Shell for Serverssecure_shell_for_servers1 vulnerability4 versions
- Accessionaccession0 vulnerabilities1 version
- Tectia Client Server Connectortectia_client_server_connector0 vulnerabilities11 versions
This directory lists the 12 SSH products with at least one tracked version, of 13 in our catalogue.
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1 new flaw affects software Acme tracks
The SSH transport protocol with certain OpenSSH extensions, found in OpenSSH before 9.6 and other products, allows remote attackers to bypass integrity checks such that some packets are omitted (from the extension negotiation message), and a client and server may consequently end up with a connection for which some security features have been downgraded or disabled, aka a Terrapin attack. This occurs because the SSH Binary Packet Protocol (BPP), implemented by these extensions, mishandles the handshake phase and mishandles use of sequence numbers. For example, there is an effective attack against SSH's use of ChaCha20-Poly1305 (and CBC with Encrypt-then-MAC). The bypass occurs in chacha20-poly1305@openssh.com and (if CBC is used) the -etm@openssh.com MAC algorithms. This also affects Maverick Synergy Java SSH API before 3.1.0-SNAPSHOT, Dropbear through 2022.83, Ssh before 5.1.1 in Erlang/OTP, PuTTY before 0.80, AsyncSSH before 2.14.2, golang.org/x/crypto before 0.17.0, libssh before 0.10.6, libssh2 through 1.11.0, Thorn Tech SFTP Gateway before 3.4.6, Tera Term before 5.1, Paramiko before 3.4.0, jsch before 0.2.15, SFTPGo before 2.5.6, Netgate pfSense Plus through 23.09.1, Netgate pfSense CE through 2.7.2, HPN-SSH through 18.2.0, ProFTPD before 1.3.8b (and before 1.3.9rc2), ORYX CycloneSSH before 2.3.4, NetSarang XShell 7 before Build 0144, CrushFTP before 10.6.0, ConnectBot SSH library before 2.2.22, Apache MINA sshd through 2.11.0, sshj through 0.37.0, TinySSH through 20230101, trilead-ssh2 6401, LANCOM LCOS and LANconfig, FileZilla before 3.66.4, Nova before 11.8, PKIX-SSH before 14.4, SecureCRT before 9.4.3, Transmit5 before 5.10.4, Win32-OpenSSH before 9.5.0.0p1-Beta, WinSCP before 6.2.2, Bitvise SSH Server before 9.32, Bitvise SSH Client before 9.33, KiTTY through 0.76.1.13, the net-ssh gem 7.2.0 for Ruby, the mscdex ssh2 module before 1.15.0 for Node.js, the thrussh library before 0.35.1 for Rust, and the Russh crate before 0.40.2 for Rust.
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- SSH on Acme's software list
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Sent to the alert recipients Acme chose. Also in the app and to Acme's webhook.
Our catalogue lists 47 published vulnerabilities across 13 products and 347 versions from SSH.
None of SSH's vulnerabilities is on the list of flaws known to be exploited today.
SSH, with 23 published vulnerabilities. Its own page lists the ones known to be exploited.
Create a Precursor Intelligence account and track the SSH products you run. We match them against every published flaw, give each one a risk score from 0 to 100 and tell you as soon as we spot one that affects you, by email, in the app or by webhook.