Detections
Analytics
Echo: nginx: security update to 1.26.3-3+deb13u7+e1
medium Tenable Cloud Security Plugin ID 460018
Description
There are packages installed that are affected by a vulnerability referenced in the following CVE:- NGINX Open Source and NGINX Plus have a vulnerability in the ngx_mail_smtp_module that might allow an
unauthenticated attacker to over-read NGINX SMTP authentication process memory; as a result, the server
side may leak arbitrary bytes sent in a request to the authentication server. This issue happens during
the NGINX SMTP authentication process and requires the attacker to make preparations against the target
system to extract the leaked data. The issue affects NGINX only if (1) it is built with the
ngx_mail_smtp_module, (2) the smtp_auth directive is configured with method "none," and (3) the
authentication server returns the "Auth-Wait" response header. Note: Software versions which have reached
End of Technical Support (EoTS) are not evaluated. (CVE-2025-53859)
Solution
Update the nginx library and its related packages to version 1.26.3-3+deb13u7+e1 or later.See Also
Plugin Details
Severity: Medium
ID: 460018
Version: Revision 1.1
Type: Local
Family: Echo Local Security Checks
Published: 10/2/2026
Updated: 10/2/2026
Risk Information
VPR
Risk Factor: Low
Score: 1.2
Percentile: 0.01
CVSS v2
Risk Factor: Low
Base Score: 2.6
Temporal Score: 1.9
Vector: CVSS2#AV:N/AC:H/Au:N/C:P/I:N/A:N
CVSS Score Source: CVE-2025-53859
CVSS v3
Risk Factor: Low
Base Score: 3.7
Temporal Score: 3.2
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
CVSS v4
Risk Factor: Medium
Base Score: 6.3
Threat Score: 1.7
Threat Vector: CVSS:4.0/E:U
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
Vulnerability Information
Exploit Ease: No known exploits are available
Patch Publication Date: 7/20/2026
Vulnerability Publication Date: 8/13/2025
Reference Information
CVE: CVE-2025-53859
IAVA: 2025-A-0615