Aggregates CVE and security vulnerability intelligence across all winscp-related products, including CVSS, EPSS, publication dates, and vulnerability intelligence data.
Disclosed issues often relate to vendor risk buffer overflow, vendor risk cross-site scripting, and vendor risk path handling; exposure may include vendor impact application crash in vendor surface production workloads contexts.
| CVE | Summary | Source | Max CVSS | EPSS % | Published | Updated |
|---|---|---|---|---|---|---|
| CVE-2024-31497 | In PuTTY 0.68 through 0.80 before 0.81, biased ECDSA nonce generation allows an attacker to recover a user's NIST P-521 secret key via a quick attack in approximately 60 signatures. This is especially important in a scenario where an adversary is able to read messages signed by PuTTY or Pageant. The required set of signed messages may be publicly readable because they are stored in a public Git service that supports use of SSH for commit signing, and the signatures were made by Pageant through a | [email protected] | 5.9 | 23.27% | 2024-04-15 | 2025-11-04 |
| CVE-2023-48795 | 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 ha | [email protected] | 5.9 | 54.21% | 2023-12-18 | 2026-05-12 |
| CVE-2021-3331 | WinSCP before 5.17.10 allows remote attackers to execute arbitrary programs when the URL handler encounters a crafted URL that loads session settings. (For example, this is exploitable in a default installation in which WinSCP is the handler for sftp:// URLs.) | [email protected] | 9.8 | 6.39% | 2021-01-27 | 2024-11-21 |
| CVE-2020-28864 | Buffer overflow in WinSCP 5.17.8 allows a malicious FTP server to cause a denial of service or possibly have other unspecified impact via a long file name. | [email protected] | 9.8 | 1.87% | 2020-11-23 | 2024-11-21 |
| CVE-2019-6111 | An issue was discovered in OpenSSH 7.9. Due to the scp implementation being derived from 1983 rcp, the server chooses which files/directories are sent to the client. However, the scp client only performs cursory validation of the object name returned (only directory traversal attacks are prevented). A malicious scp server (or Man-in-The-Middle attacker) can overwrite arbitrary files in the scp client target directory. If recursive operation (-r) is performed, the server can manipulate subdirecto | [email protected] | 5.9 | 54.21% | 2019-01-31 | 2025-12-18 |
| CVE-2019-6110 | In 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 being transferred. | [email protected] | 6.8 | 57.57% | 2019-01-31 | 2025-12-18 |
| CVE-2019-6109 | An issue was discovered in OpenSSH 7.9. Due to missing character encoding in the progress display, a malicious server (or Man-in-The-Middle attacker) can employ crafted object names to manipulate the client output, e.g., by using ANSI control codes to hide additional files being transferred. This affects refresh_progress_meter() in progressmeter.c. | [email protected] | 6.8 | 9.74% | 2019-01-31 | 2026-05-28 |
| CVE-2018-20685 | In OpenSSH 7.9, scp.c in the scp client allows remote SSH servers to bypass intended access restrictions via the filename of . or an empty filename. The impact is modifying the permissions of the target directory on the client side. | [email protected] | 5.3 | 3.38% | 2019-01-10 | 2025-12-17 |
| CVE-2018-20684 | In WinSCP before 5.14 beta, due to missing validation, the scp implementation would accept arbitrary files sent by the server, potentially overwriting unrelated files. This affects TSCPFileSystem::SCPSink in core/ScpFileSystem.cpp. | [email protected] | 7.5 | 0.59% | 2019-01-10 | 2024-11-21 |
| CVE-2014-2735 | WinSCP before 5.5.3, when FTP with TLS is used, does not verify that the server hostname matches a domain name in the subject's Common Name (CN) or subjectAltName field of the X.509 certificate, which allows man-in-the-middle attackers to spoof SSL servers via an arbitrary valid certificate. | [email protected] | 5.8 | 0.16% | 2014-04-22 | 2026-05-06 |
| CVE-2013-4852 | 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. | [email protected] | 6.8 | 1.75% | 2013-08-19 | 2026-04-29 |
| CVE-2007-4909 | Interpretation conflict in WinSCP before 4.0.4 allows remote attackers to perform arbitrary file transfers with a remote server via file-transfer commands in the final portion of a (1) scp, and possibly a (2) sftp or (3) ftp, URL, as demonstrated by a URL specifying login to the remote server with a username of scp, which is interpreted as an HTTP scheme name by the protocol handler in a web browser, but is interpreted as a username by WinSCP. NOTE: this is related to an incomplete fix for CVE- | [email protected] | 9.3 | 14.07% | 2007-09-17 | 2026-04-23 |
| CVE-2006-3015 | Argument injection vulnerability in WinSCP 3.8.1 build 328 allows remote attackers to upload or download arbitrary files via encoded spaces and double-quote characters in a scp or sftp URI. | [email protected] | 7.1 | 17.57% | 2006-06-14 | 2026-04-16 |
| CVE-2002-1360 | 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. | [email protected] | 10.0 | 4.13% | 2002-12-23 | 2026-04-16 |
| CVE-2002-1359 | Multiple SSH2 servers and clients do not properly handle large packets or large fields, which may allow remote attackers to cause a denial of service or possibly execute arbitrary code via buffer overflow attacks, as demonstrated by the SSHredder SSH protocol test suite. | [email protected] | 10.0 | 87.00% | 2002-12-23 | 2026-04-16 |
| CVE-2002-1358 | 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. | [email protected] | 10.0 | 4.13% | 2002-12-23 | 2026-04-16 |
| CVE-2002-1357 | 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. | [email protected] | 10.0 | 21.35% | 2002-12-23 | 2026-04-16 |