Vulnerability Details : CVE-2021-26569
Race Condition within a Thread 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.
Vulnerability category: Execute code
Products affected by CVE-2021-26569
- cpe:2.3:o:synology:diskstation_manager:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-26569
1.62%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 80 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-26569
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
6.8
|
MEDIUM | AV:N/AC:M/Au:N/C:P/I:P/A:P |
8.6
|
6.4
|
NIST | |
|
8.1
|
HIGH | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
2.2
|
5.9
|
NIST | |
|
9.8
|
CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
3.9
|
5.9
|
Synology Inc. |
CWE ids for CVE-2021-26569
-
The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.Assigned by: nvd@nist.gov (Primary)
-
If two threads of execution use a resource simultaneously, there exists the possibility that resources may be used while invalid, in turn making the state of execution undefined.Assigned by: security@synology.com (Secondary)
References for CVE-2021-26569
-
https://www.zerodayinitiative.com/advisories/ZDI-21-338/
ZDI-21-338 | Zero Day InitiativeThird Party Advisory;VDB Entry
-
https://www.synology.com/security/advisory/Synology_SA_20_26
Synology Inc.Vendor Advisory
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