Insufficient session timeout vulnerability in Sagemcom router

published 2024-03-14 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-17363

cvss: 7.7; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 7%
public exploits: 0; none known

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.

Patch / fix

fixed in 2

Sagemcom FAST3686 V2 Vodafone FAST3686_ONO-SIP_3.709.2
sagemcom fast3686_v2_vodafone FAST3686_ONO-SIP_3.709.2

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 2 y ago (2024-03-14)

Exploit prediction

0.18% chance of exploitation in the next 30 days, higher than 7% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	7.7	CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
NVD	3.1	7.8	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

Sagemcom FAST3686 V2 Vodafone
sagemcom fast3686_v2_vodafone

Classification

Weakness

CWE-613 DEPRECATED: Insufficient Session Expiration

References

incibe.es /en/incibe-cert/notices/aviso/insufficient-session-timeout-vulnerability-sagemcom-router
third-party-advisory

Sources

CVE List CVE-2024-1623
NVD CVE-2024-1623

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Summary