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CVE-2026-119568— vsftpd through 3.0.5 require_ssl_reuse Bypass via FTPS Data Channel Hijacking

Quick assessment

Affected

vsftpd vsftpd

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

vsftpd 3.0.5 及更早版本中存在一个身份验证绕过漏洞，位于函数中。该漏洞允许未认证的攻击者通过恢复其自身的 TLS 会话票据（session ticket），劫持 FTPS 数据连接。若攻击者与受害者共享相同的源 IP 地址，则攻击者可先通过命令获取会话票据，随后连接到受害者的 PASV 端口，从而窃取下载文件或注入上传数据。

CVSS 7.4 · High Updated Oct 31, 2026

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

Vendor	Product	Version Range	Status
vsftpd	vsftpd	`≤ 3.0.5`	affected

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Vulnerability Information

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Vulnerability Title

vsftpd through 3.0.5 require_ssl_reuse Bypass via FTPS Data Channel Hijacking

Source: CVE Program / CVE List V5

Vulnerability Description

vsftpd through 3.0.5 contains an authentication bypass vulnerability in ssl_data_accept() that allows unauthenticated attackers to hijack FTPS data connections by resuming their own TLS session ticket. Attackers sharing the victim's source IP can obtain a ticket via AUTH TLS, then connect to the victim's PASV port to steal downloads or inject upload data.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Source: CVE Program / CVE List V5

Vulnerability Type

通信信道源的不正确验证

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
vsftpd	vsftpd	0 ~ 3.0.5	-

II. Public POCs for CVE-2026-119568

#	POC Description	Source Link	Shenlong Link

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No public POC found.

III. Intelligence Information for CVE-2026-119568

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Vendor Advisories for CVE-2026-119568 (1)

🔗 vsftpd through 3.0.5 require_ssl_reuse Bypass via FTPS Data Channel Hijacking | Advisories | VulnCheck third-party-advisory

Vendor Pages for CVE-2026-119568 (1)

🔗 vsftpd - Secure, fast FTP server for UNIX-like systems Read full article product

https://www.cve.org/CVERecord?id=CVE-2026-119568

IV. Related Vulnerabilities

Same product: vsftpd

Same vendor: vsftpd

Same weakness: CWE-940