How severe is CVE-2015-2809?

CVE-2015-2809 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2015-2809 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-2809?

CVE-2015-2809 affects Synology Diskstation Manager. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2015-2809?

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

When was CVE-2015-2809 published?

CVE-2015-2809 was published on 2015-04-01 and last updated on 2026-06-17.

CVE-2015-2809

CVE-2015-2809 is a medium-severity vulnerability in Synology Diskstation Manager with a CVSS 2.0 base score of 5.0. 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-200.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 4% (89th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Synology Diskstation Manager
Published: 2015-04-01
Last modified: 2026-06-17

Description

The Multicast DNS (mDNS) responder in Synology DiskStation Manager (DSM) before 3.1 inadvertently responds to unicast queries with source addresses that are not link-local, which allows remote attackers to cause a denial of service (traffic amplification) or obtain potentially sensitive information via port-5353 UDP packets to the Avahi component.

Frequently asked questions

What is CVE-2015-2809?: The Multicast DNS (mDNS) responder in Synology DiskStation Manager (DSM) before 3.1 inadvertently responds to unicast queries with source addresses that are not link-local, which allows remote attackers to cause a denial of service (traffic amplification) or obtain potentially sensitive information via port-5353 UDP packets to the Avahi component.
How severe is CVE-2015-2809?: CVE-2015-2809 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2015-2809 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-2809?: CVE-2015-2809 affects Synology Diskstation Manager. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2015-2809?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2015-2809 published?: CVE-2015-2809 was published on 2015-04-01 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:synology:diskstation_manager:*:*:*:*:*:*:*:*

More vulnerabilities in Synology Diskstation Manager

CVE-2022-27626 — Critical (CVSS 10.0): A vulnerability regarding concurrent execution using shared resource with improper synchronization ('Race Condition')…
CVE-2022-27625 — Critical (CVSS 10.0): A vulnerability regarding improper restriction of operations within the bounds of a memory buffer is found in the…
CVE-2022-27624 — Critical (CVSS 10.0): A vulnerability regarding improper restriction of operations within the bounds of a memory buffer is found in the…
CVE-2013-6955 — Critical (CVSS 10.0): webman/imageSelector.cgi in Synology DiskStation Manager (DSM) 4.0 before 4.0-2259, 4.2 before 4.2-3243, and 4.3 before…
CVE-2024-10441 — Critical (CVSS 9.8): Improper encoding or escaping of output vulnerability in the system plugin daemon in Synology BeeStation OS (BSM)…
CVE-2022-22687 — Critical (CVSS 9.8): Buffer copy without checking size of input ('Classic Buffer Overflow') vulnerability in Authentication functionality in…

All CVEs affecting Synology Diskstation Manager →

Other CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor) vulnerabilities

CVE-2026-92960 — Critical (CVSS 10.0): vm2 before 3.11.6 fails to restrict access to os and dns builtins under the builtin: ['*'] configuration, allowing…
CVE-2026-92947 — Critical (CVSS 10.0): vm2 before 3.11.7 exposes Node's shared Buffer pool to sandboxed code, allowing disclosure of host memory used by…
CVE-2026-70478 — Critical (CVSS 10.0): Flowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.1.3, the POST…
CVE-2026-27604 — Critical (CVSS 10.0): FOSSBilling is a free, open-source billing and client management system. Starting in version 0.5.4 and prior to version…
CVE-2026-40965 — Critical (CVSS 10.0): Cloud Foundry UAA versions v76.12.0 through v78.12.0 are vulnerable to a private key exposure. The server contains a…
CVE-2026-42826 — Critical (CVSS 10.0): Exposure of sensitive information to an unauthorized actor in Azure DevOps allows an unauthorized attacker to disclose…

Browse all CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor) vulnerabilities →