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VulnerabilityPublished

CVE-2025-15686: Open5GS · CWE-404

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Authoritative record:CVE-2025-15686· Medium 5.3

Public exploit available · CVSS 5.3 Medium.

Data as of 9 Nov 2026, 23:23 UTC

CVSS 4.0 base score
5.3Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.5% chance of exploitation in 30 days – higher than 45% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 12 Aug 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: evidence found.

    CVSS exploit maturity: proof of concept public

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), CVSS vector, the Metasploit, Exploit-DB and nuclei-templates index as of 10 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
Open5GSAffected
  • 2.7.0 – 2.7.6
7 affected builds
Fixed in–
GitHubopen5gs/open5gspkg:github/open5gs/open5gsOther threatsAffected
  • 2.7.0 – 2.7.6
7 affected builds
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Until a fix is available, consider restricting access to the affected service and monitoring for exploitation attempts.

Description

A denial of service vulnerability exists in Open5GS up to version 2.7.6 in the HSS Service component's fd_msg_sess_get function. The issue arises from manipulation of the Session-Id argument, allowing a remote attacker to cause service disruption. Public exploit code has been disclosed. The vulnerability has a medium severity rating with a CVSS score of 4.3.

References

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