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Vulnerability record · CVE-2024-1623 · published 14 March 2024

CVE-2024-1623: Sagemcom f\@st 3686 firmware insufficient session expiration vulnerability

Sagemcom · F\@St 3686 Firmware

Insufficient session timeout vulnerability in the FAST3686 V2 Vodafone router from Sagemcom. This vulnerability could allow a local attacker to access the administration panel without requiring login credentials. This vulnerability is possible because the 'Login.asp and logout.asp' files do not handle session details correctly.

7.8 CVSS 3.1 High EPSS 0.18% · top 93.3% CWE-613 · Insufficient session expiration
7.8CVSS 3.1 base score
0.18%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

Insufficient session timeout vulnerability in the FAST3686 V2 Vodafone router from Sagemcom. This vulnerability could allow a local attacker to access the administration panel without requiring login credentials. This vulnerability is possible because the 'Login.asp and logout.asp' files do not handle session details correctly.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.incibe.es/en/incibe-cert/notices/aviso/insufficient-session-timeout-vulnerability-sagemcom-router Third Party Advisory
https://www.incibe.es/en/incibe-cert/notices/aviso/insufficient-session-timeout-vulnerability-sagemcom-router Third Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2025-29329Sagemcom f\@st 3686 firmware classic buffer overflow vulnerabilityBuffer Overflow in the ippprint (Internet Printing Protocol) service in Sagemcom F@st 3686 MAGYAR_4.121.0 allows remote attacker to execute arbitrary…EPSS 0.98%9.8CVE-2021-3304Sagemcom f\@st 3686 firmware classic buffer overflow vulnerabilitySagemcom F@ST 3686 v2 3.495 devices have a buffer overflow via a long sessionKey to the goform/login URI.EPSS 1.6%8.8CVE-2019-19494Sagemcom f\@st 3890 firmware classic buffer overflow vulnerabilityBroadcom based cable modems across multiple vendors are vulnerable to a buffer overflow, which allows a remote attacker to execute arbitrary code at …EPSS 23%6.1CVE-2020-21733Sagemcom f\@st 3686 firmware cross-site scripting vulnerabilitySagemcom F@ST3686 v1.0 HUN 3.97.0 has XSS via RgDiagnostics.asp, RgDdns.asp, RgFirewallEL.asp, RgVpnL2tpPptp.asp.EPSS 0.73%

Source: NIST National Vulnerability Database (record CVE-2024-1623), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.