CVE-2026-77352Public exploitNetwork attack vector

Authenticated SSRF via unchecked SMTP notification host

Published Aug 31, 2026 · Updated Sep 1, 2026

SSRF in ellite Wallos 2.0.0 through 4.9.6 allows remote authenticated users to open outbound SMTP connections to internal hosts. The saveemailnotifications.php endpoint stores an unchecked per-user SMTP host, which sendnotifications.php assigns directly to PHPMailer before connecting. Any ordinary account can trigger blind internal port reconnaissance and interaction with SMTP-speaking services when a subscription notification fires.

CVSS severity4.3
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in ellite Wallos 2.0.0 through 4.9.6 allows remote authenticated users to open outbound SMTP connections to internal hosts. The saveemailnotifications.php endpoint stores an unchecked per-user SMTP host, which sendnotifications.php assigns directly to PHPMailer before connecting. Any ordinary account can trigger blind internal port reconnaissance and interaction with SMTP-speaking services when a subscription notification fires.

The record

CVE
CVE-2026-77352
Published
Aug 31, 2026
Updated
Sep 1, 2026
Vendor
ellite
Product
Wallos
Classifications
CWE-918, T1046
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 31, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 1, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 2.0.0, < 5.0.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

ellite · Wallosversion=>= 2.0.0, < 5.0.0

Published CVSS scores

4.3GitHubCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
T1046Network Service Discovery

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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