Vulnerability · Published Mar 12, 2021 · Assigned by synology
CVE-2021-27646
Critical 9.8
In plain English
A critical-severity use-after-free in Synology DiskStation Manager (DSM) from Synology. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 3.9% (higher than 90% of all known vulnerabilities).
Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)3.9%top 9.6% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
Use After Free vulnerability in iscsi_snapshot_comm_core in Synology DiskStation Manager (DSM) before 6.2.3-25426-3 allows remote attackers to execute arbitrary code via crafted web requests.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Synology | Synology DiskStation Manager (DSM) | unspecified – before 6.2.3-25426-3 |
Weakness: CWE-416 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
References
- https://www.synology.com/security/advisory/Synology_SA_20_26 x_refsource_CONFIRM
- https://www.zerodayinitiative.com/advisories/ZDI-21-340/ x_refsource_MISC
- https://www.zerodayinitiative.com/advisories/ZDI-21-339/ x_refsource_MISC