How severe is CVE-2024-39349?

CVE-2024-39349 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2024-39349 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-39349?

CVE-2024-39349 primarily affects Synology Bc500 Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2024-39349?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2024-39349 have an EU (EUVD) identifier?

Yes. CVE-2024-39349 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-37912.

When was CVE-2024-39349 published?

CVE-2024-39349 was published on 2024-06-28 and last updated on 2026-06-17.

CVE-2024-39349

CVE-2024-39349 is a critical-severity vulnerability in Synology Bc500 Firmware with a CVSS 3.x base score of 9.8. 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-120.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (70th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-37912
Weakness: CWE-120
Affected product: Synology Bc500 Firmware
Published: 2024-06-28
Last modified: 2026-06-17

Description

A vulnerability regarding buffer copy without checking size of input ('Classic Buffer Overflow') is found in the libjansson component and it does not affect the upstream library. This allows remote attackers to execute arbitrary code via unspecified vectors. The following models with Synology Camera Firmware versions before 1.0.7-0298 may be affected: BC500 and TC500.

Frequently asked questions

What is CVE-2024-39349?: A vulnerability regarding buffer copy without checking size of input ('Classic Buffer Overflow') is found in the libjansson component and it does not affect the upstream library. This allows remote attackers to execute arbitrary code via unspecified vectors. The following models with Synology Camera Firmware versions before 1.0.7-0298 may be affected: BC500 and TC500.
How severe is CVE-2024-39349?: CVE-2024-39349 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2024-39349 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-39349?: CVE-2024-39349 primarily affects Synology Bc500 Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2024-39349?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2024-39349 have an EU (EUVD) identifier?: Yes. CVE-2024-39349 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-37912.
When was CVE-2024-39349 published?: CVE-2024-39349 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_15

Affected products (2)

cpe:2.3:o:synology:bc500_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:synology:tc500_firmware:*:*:*:*:*:*:*:*

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