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TI-2021-11568 Aliases CVE-2021-31439GHSA-8292-4xc6-r7cv

Heap-based buffer overflow in Synology DiskStation Manager

Priority MEDIUM 43CWE-122Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-122 and the CVSS impact.

Summary

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Synology DiskStation Manager. Authentication is not required to exploit this vulnerablity. The specific flaw exists within the processing of DSI structures in Netatalk. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-12326.

Why it matters now

EPSS 0.02331 83rd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
SynologyDiskStation Manager6.1.1-15101-4—No fix listedCNA
  • DiskStation Manager VendorSynology Affected 6.1.1-15101-4 Fixed in — No fix listed CNA

CPE configurations NVD · 4

CPEVersionsRoleVendor
cpe:2.3:o:synology:diskstation_manager:*:*:*:*:*:*:*:*6.2 to before 6.2.3-25426-3VulnerableSynology
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*10.0VulnerableDebian
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*11.0VulnerableDebian
cpe:2.3:a:netatalk:netatalk:*:*:*:*:*:*:*:*before 3.1.13VulnerableNetatalk
  • cpe:2.3:o:synology:diskstation_manager:*:*:*:*:*:*:*:* Versions 6.2 to before 6.2.3-25426-3 Vulnerable ·Synology
  • cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Debian
  • cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* Versions 11.0 Vulnerable ·Debian
  • cpe:2.3:a:netatalk:netatalk:*:*:*:*:*:*:*:* Versions before 3.1.13 Vulnerable ·Netatalk

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-31439
  2. 2026-10-03 Alias added: GHSA-8292-4xc6-r7cv

References

Advisory 5

  • TI-2021-02242 Sudo before 1.9.5p2 contains an off-by-one error that can result in a heap-based buffer… KEVCVSS 3.1HIGH 7.8
  • TI-2018-01076 Out-of-bounds write in Netatalk CVSS 3.1CRITICAL 9.8
  • TI-2017-10594 Heap-based buffer overflow in dnsmasq before 2.78 allows remote attackers to cause a… CVSS 3.1CRITICAL 9.8
  • TI-2013-05716 webman/imageSelector.cgi in Synology DiskStation Manager (DSM) 4.0 before 4.0-2259, 4.2… CVSS 2.0HIGH 10.0
  • TI-2021-19843 Out-of-bounds read in Samba CVSS 3.1HIGH 8.8
  • TI-2017-11636 Command injection in Synology DiskStation Manager CVSS 3.0HIGH 8.8
See all 96 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences