Detections
Analytics

Echo: libssh2: security update to 1.11.1-1+e4

high Tenable Cloud Security Plugin ID 458802

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - libssh2 through 1.11.1, fixed in commit 2dae302, contains an out-of-bounds heap read vulnerability in the
 sftp_symlink() function in src/sftp.c that allows a malicious SSH server or man-in-the-middle attacker to
 disclose heap memory contents or cause a crash by sending a crafted SSH_FXP_NAME response. Attackers can
 supply a link_len value larger than the actual packet data in SSH_FXP_NAME responses for SFTP READLINK and
 REALPATH operations, triggering a heap buffer over-read of up to target_len minus one bytes due to the
 missing validation of available packet buffer size before the memcpy operation. (CVE-2025-15661)

Solution

Update the libssh2 library and its related packages to version 1.11.1-1+e4 or later.

See Also

https://advisory.echohq.com/cve/CVE-2025-15661

Plugin Details

Severity: High

ID: 458802

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Low

Score: 3.5

Percentile: 51.64

CVSS v2

Risk Factor: Medium

Base Score: 6.1

Temporal Score: 4.5

Vector: CVSS2#AV:N/AC:H/Au:N/C:P/I:N/A:C

CVSS Score Source: CVE-2025-15661

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: High

Base Score: 8.3

Threat Score: 4.8

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 6/20/2026

Vulnerability Publication Date: 6/18/2026

Reference Information

CVE: CVE-2025-15661