Quick answers
- Is CVE-2026-86343 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-86343 being exploited in the wild.
- How severe is CVE-2026-86343?
- Medium severity, with a CVSS score of 6.8, published 12 November 2026.
- Which products and versions are affected?
- Synology DiskStation Manager 7.3 before 7.3.2-86009-5, 7.4 before 7.4.1-90080-1.
- Is there a fix for CVE-2026-86343?
- Yes: fixed in DSM 7.3.2-86009-5, 7.4.1-90080-1. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-86343 attacked?
- It is attacked from the adjacent network.
- Am I affected by CVE-2026-86343?
- Check whether you run Synology DiskStation Manager at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
How to fix
- Fixed in: DSM 7.3.2-86009-5, 7.4.1-90080-1
Technical details
A CWE-93 CRLF injection vulnerability exists in the SNMP API component of DSM, allowing remote authenticated users with administrator privileges to inject carriage return and line feed sequences. The vulnerability permits arbitrary file read/write operations and denial-of-service attacks. The attack requires network access and valid administrator credentials.
Affected products
- Synology DiskStation Manager 7.3 before 7.3.2-86009-5, 7.4 before 7.4.1-90080-1
Timeline
- 2026-11-10: disclosed
- 2026-11-12: advisory