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Including CVEs outside Waratek scope✕Vendor putty✕
Overview 29 matches · 0 in Waratek scope · 0 protected · 0 exploited · 0 CISA KEV · 0 public PoC · 0 EPSS ≥ 0.5
29matches 0in Waratek scope0.0% 0protected0.0% 0exploited0.0% 0CISA KEV0.0% 0public PoC0.0% 0EPSS ≥ 0.50.0%
Protected by Waratek 0 0.0% Rule in development 0 0.0% Mitigation candidate 0 0.0% No exploit published 0 0.0% Outside Waratek scope 5 17.2% Not applicable 24 82.8% Withdrawn CVE 0 0.0%
Critical 3 10.3% High 14 48.3% Medium 6 20.7% Low 6 20.7% None 0 0.0% Unknown 0 0.0%
blocked by ARMR today 0 0.0% partly blocked 0 0.0% not blocked 29 100.0% not established 0 0.0% unrecorded 0 0.0%
Exploited 0 0.0% Working exploit published 0 0.0% Proof of concept only 0 0.0% Forecast only 0 0.0% No public exploit 29 100.0%
split by peak 7 / year
Not applicable: 24Outside Waratek scope: 5 Low: 6Medium: 6High: 14Critical: 3 not blocked: 29 No public exploit: 29
20023 Not applicable3 High3 not blocked3 No public exploit3 20032 Not applicable2 High1 Medium1 not blocked2 No public exploit2 20041 Not applicable1 High1 not blocked1 No public exploit1 20052 Not applicable2 High2 not blocked2 No public exploit2 20060 20071 Not applicable1 Low1 not blocked1 No public exploit1 20080 20090 20100 20110 20120 20135 Not applicable5 Medium3 Low2 not blocked5 No public exploit5 20140 20151 Not applicable1 Low1 not blocked1 No public exploit1 20160 20171 Not applicable1 High1 not blocked1 No public exploit1 20180 20197 Outside Waratek scope4 Not applicable3 Critical3 High4 not blocked7 No public exploit7 20201 Outside Waratek scope1 Medium1 not blocked1 No public exploit1 20212 Not applicable2 High2 not blocked2 No public exploit2 20220 20230 20240 20250 20263 Not applicable3 Medium1 Low2 not blocked3 No public exploit3
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29 matches Sign in to download these CVEs as CSV or JSON, or to follow them in a feed.
CVE Severity Published▾ Status Exploitation Description
CVE-2026-48852 Low 2026-05-25 Not applicable No public exploit PuTTY 0.71 before 0.84 has an assertion failure in ECDSA signature verification.
CVE-2026-48851 Low 2026-05-25 Not applicable No public exploit PuTTY 0.77 before 0.84 uses a copy of the PuTTY icon as a trust indication for TELNET data but the trust status is not cleared between proxy authentication and the main session.
CVE-2026-48850 Medium 2026-05-25 Not applicable No public exploit PuTTY 0.72 before 0.84 has a double free in RSA KEX.
CVE-2021-36367 High 2021-07-09 Not applicable No public exploit PuTTY through 0.75 proceeds with establishing an SSH session even if it has never sent a substantive authentication response. This makes it easier for an attacker-controlled SSH server to present a later spoofed authentication prompt (that the attacker can use to capture credential data, and use that data for purposes that are undesired by the client user).
CVE-2021-33500 High 2021-05-21 Not applicable No public exploit PuTTY before 0.75 on Windows allows remote servers to cause a denial of service (Windows GUI hang) by telling the PuTTY window to change its title repeatedly at high speed, which results in many SetWindowTextA or SetWindowTextW calls. NOTE: the same attack methodology may affect some OS-level GUIs on Linux or other platforms for similar reasons.
CVE-2020-14002 Medium 2020-06-29 Outside Waratek scope No public exploit PuTTY 0.68 through 0.73 has an Observable Discrepancy leading to an information leak in the algorithm negotiation. This allows man-in-the-middle attackers to target initial connection attempts (where no host key for the server has been cached by the client).
CVE-2019-17069 High 2019-10-01 Outside Waratek scope No public exploit PuTTY before 0.73 might allow remote SSH-1 servers to cause a denial of service by accessing freed memory locations via an SSH1_MSG_DISCONNECT message.
CVE-2019-17068 High 2019-10-01 Not applicable No public exploit PuTTY before 0.73 mishandles the "bracketed paste mode" protection mechanism, which may allow a session to be affected by malicious clipboard content.
CVE-2019-17067 Critical 2019-10-01 Not applicable No public exploit PuTTY before 0.73 on Windows improperly opens port-forwarding listening sockets, which allows attackers to listen on the same port to steal an incoming connection.
CVE-2019-9898 Critical 2019-03-21 Outside Waratek scope No public exploit Potential recycling of random numbers used in cryptography exists within PuTTY before 0.71.
CVE-2019-9897 High 2019-03-21 Outside Waratek scope No public exploit Multiple denial-of-service attacks that can be triggered by writing to the terminal exist in PuTTY versions before 0.71.
CVE-2019-9895 Critical 2019-03-21 Not applicable No public exploit In PuTTY versions before 0.71 on Unix, a remotely triggerable buffer overflow exists in any kind of server-to-client forwarding.
CVE-2019-9894 High 2019-03-21 Outside Waratek scope No public exploit A remotely triggerable memory overwrite in RSA key exchange in PuTTY before 0.71 can occur before host key verification.
CVE-2016-6167 High 2017-01-30 Not applicable No public exploit Multiple untrusted search path vulnerabilities in Putty beta 0.67 allow local users to execute arbitrary code and conduct DLL hijacking attacks via a Trojan horse (1) UxTheme.dll or (2) ntmarta.dll file in the current working directory.
CVE-2015-2157 Low 2015-03-27 Not applicable No public exploit The (1) ssh2_load_userkey and (2) ssh2_save_userkey functions in PuTTY 0.51 through 0.63 do not properly wipe SSH-2 private keys from memory, which allows local users to obtain sensitive information by reading the memory.
CVE-2011-4607 Low 2013-08-23 Not applicable No public exploit PuTTY 0.59 through 0.61 does not clear sensitive process memory when managing user replies that occur during keyboard-interactive authentication, which might allow local users to read login passwords by obtaining access to the process' memory.
CVE-2013-4852 Medium 2013-08-19 Not applicable No public exploit Integer overflow in PuTTY 0.62 and earlier, WinSCP before 5.1.6, and other products that use PuTTY allows remote SSH servers to cause a denial of service (crash) and possibly execute arbitrary code in certain applications that use PuTTY via a negative size value in an RSA key signature during the SSH handshake, which triggers a heap-based buffer overflow.
CVE-2013-4208 Low 2013-08-19 Not applicable No public exploit The rsa_verify function in PuTTY before 0.63 (1) does not clear sensitive process memory after use and (2) does not free certain structures containing sensitive process memory, which might allow local users to discover private RSA and DSA keys.
CVE-2013-4207 Medium 2013-08-19 Not applicable No public exploit Buffer overflow in sshbn.c in PuTTY before 0.63 allows remote SSH servers to cause a denial of service (crash) via an invalid DSA signature that is not properly handled during computation of a modular inverse and triggers the overflow during a division by zero by the bignum functionality, a different vulnerability than CVE-2013-4206.
CVE-2013-4206 Medium 2013-08-19 Not applicable No public exploit Heap-based buffer underflow in the modmul function in sshbn.c in PuTTY before 0.63 allows remote SSH servers to cause a denial of service (crash) and possibly trigger memory corruption or code execution via a crafted DSA signature, which is not properly handled when performing certain bit-shifting operations during modular multiplication.
CVE-2006-7162 Low 2007-03-07 Not applicable No public exploit PuTTY 0.59 and earlier uses weak file permissions for (1) ppk files containing private keys generated by puttygen and (2) session logs created by putty, which allows local users to gain sensitive information by reading these files.
CVE-2005-0467 High 2005-02-21 Not applicable No public exploit Multiple integer overflows in the (1) sftp_pkt_getstring and (2) fxp_readdir_recv functions in the PSFTP and PSCP clients for PuTTY 0.56, and possibly earlier versions, allow remote malicious web sites to execute arbitrary code via SFTP responses that corrupt the heap after insufficient memory has been allocated.
CVE-2004-1008 High 2005-01-10 Not applicable No public exploit Integer signedness error in the ssh2_rdpkt function in PuTTY before 0.56 allows remote attackers to execute arbitrary code via a SSH2_MSG_DEBUG packet with a modified stringlen parameter, which leads to a buffer overflow.
CVE-2004-1440 High 2004-12-31 Not applicable No public exploit Multiple heap-based buffer overflows in the modpow function in PuTTY before 0.55 allow (1) remote attackers to execute arbitrary code via an SSH2 packet with a base argument that is larger than the mod argument, which causes the modpow function to write memory before the beginning of its buffer, and (2) remote malicious servers to cause a denial of service (client crash) and possibly execute arbitrary code via a large bignum during authentication.
CVE-2003-0069 High 2003-03-18 Not applicable No public exploit The PuTTY terminal emulator 0.53 allows attackers to modify the window title via a certain character escape sequence and then insert it back to the command line in the user's terminal, e.g. when the user views a file containing the malicious sequence, which could allow the attacker to execute arbitrary commands.
CVE-2003-0048 Medium 2003-02-19 Not applicable No public exploit PuTTY 0.53b and earlier does not clear logon credentials from memory, including plaintext passwords, which could allow attackers with access to memory to steal the SSH credentials.
CVE-2002-1360 High 2002-12-23 Not applicable No public exploit Multiple SSH2 servers and clients do not properly handle strings with null characters in them when the string length is specified by a length field, which could allow remote attackers to cause a denial of service or possibly execute arbitrary code due to interactions with the use of null-terminated strings as implemented using languages such as C, as demonstrated by the SSHredder SSH protocol test suite.
CVE-2002-1358 High 2002-12-23 Not applicable No public exploit Multiple SSH2 servers and clients do not properly handle lists with empty elements or strings, which may allow remote attackers to cause a denial of service or possibly execute arbitrary code, as demonstrated by the SSHredder SSH protocol test suite.
CVE-2002-1357 High 2002-12-23 Not applicable No public exploit Multiple SSH2 servers and clients do not properly handle packets or data elements with incorrect length specifiers, which may allow remote attackers to cause a denial of service or possibly execute arbitrary code, as demonstrated by the SSHredder SSH protocol test suite.