How severe is CVE-2024-39347?

CVE-2024-39347 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2024-39347 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-39347?

CVE-2024-39347 primarily affects Synology Router Manager. In total, 20 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2024-39347?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2024-39347 have an EU (EUVD) identifier?

Yes. CVE-2024-39347 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-37910.

When was CVE-2024-39347 published?

CVE-2024-39347 was published on 2024-06-28 and last updated on 2026-06-17.

CVE-2024-39347

CVE-2024-39347 is a medium-severity vulnerability in Synology Router Manager with a CVSS 3.x base score of 5.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-276.

Key facts

Severity: Medium (CVSS 3.x base score 5.9)
EPSS exploit prediction: 1% (41st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-37910
Weakness: CWE-276
Affected product: Synology Router Manager
Published: 2024-06-28
Last modified: 2026-06-17

Description

Incorrect default permissions vulnerability in firewall functionality in Synology Router Manager (SRM) before 1.2.5-8227-11 and 1.3.1-9346-8 allows man-in-the-middle attackers to access highly sensitive intranet resources via unspecified vectors.

Frequently asked questions

What is CVE-2024-39347?: Incorrect default permissions vulnerability in firewall functionality in Synology Router Manager (SRM) before 1.2.5-8227-11 and 1.3.1-9346-8 allows man-in-the-middle attackers to access highly sensitive intranet resources via unspecified vectors.
How severe is CVE-2024-39347?: CVE-2024-39347 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2024-39347 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-39347?: CVE-2024-39347 primarily affects Synology Router Manager. In total, 20 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2024-39347?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2024-39347 have an EU (EUVD) identifier?: Yes. CVE-2024-39347 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-37910.
When was CVE-2024-39347 published?: CVE-2024-39347 was published on 2024-06-28 and last updated on 2026-06-17.

References

https://www.synology.com/en-global/security/advisory/Synology_SA_23_16

Affected products (20)

cpe:2.3:o:synology:router_manager:*:*:*:*:*:*:*:*
cpe:2.3:o:synology:router_manager:1.2.5-8227:-:*:*:*:*:*:*
cpe:2.3:o:synology:router_manager:1.2.5-8227:update1:*:*:*:*:*:*
cpe:2.3:o:synology:router_manager:1.2.5-8227:update10:*:*:*:*:*:*
cpe:2.3:o:synology:router_manager:1.2.5-8227:update2:*:*:*:*:*:*
cpe:2.3:o:synology:router_manager:1.2.5-8227:update3:*:*:*:*:*:*
cpe:2.3:o:synology:router_manager:1.2.5-8227:update4:*:*:*:*:*:*
cpe:2.3:o:synology:router_manager:1.2.5-8227:update5:*:*:*:*:*:*
cpe:2.3:o:synology:router_manager:1.2.5-8227:update6:*:*:*:*:*:*
cpe:2.3:o:synology:router_manager:1.2.5-8227:update7:*:*:*:*:*:*
cpe:2.3:o:synology:router_manager:1.2.5-8227:update8:*:*:*:*:*:*
cpe:2.3:o:synology:router_manager:1.2.5-8227:update9:*:*:*:*:*:*
cpe:2.3:o:synology:router_manager:1.3.1-9346:-:*:*:*:*:*:*
cpe:2.3:o:synology:router_manager:1.3.1-9346:update1:*:*:*:*:*:*
cpe:2.3:o:synology:router_manager:1.3.1-9346:update2:*:*:*:*:*:*
cpe:2.3:o:synology:router_manager:1.3.1-9346:update3:*:*:*:*:*:*
cpe:2.3:o:synology:router_manager:1.3.1-9346:update4:*:*:*:*:*:*
cpe:2.3:o:synology:router_manager:1.3.1-9346:update5:*:*:*:*:*:*
cpe:2.3:o:synology:router_manager:1.3.1-9346:update6:*:*:*:*:*:*
cpe:2.3:o:synology:router_manager:1.3.1-9346:update7:*:*:*:*:*:*

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CVE-2019-19896 — Critical (CVSS 9.9): In IXP EasyInstall 6.2.13723, there is Remote Code Execution via weak permissions on the Engine Service share. The…
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