Vulnerability Details : CVE-2021-26561
Stack-based buffer overflow vulnerability in synoagentregisterd in Synology DiskStation Manager (DSM) before 6.2.3-25426-3 allows man-in-the-middle attackers to execute arbitrary code via syno_finder_site HTTP header.
Vulnerability category: OverflowExecute code
Exploit prediction scoring system (EPSS) score for CVE-2021-26561
Probability of exploitation activity in the next 30 days: 0.10%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 40 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2021-26561
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|
|
6.8
|
MEDIUM | AV:N/AC:M/Au:N/C:P/I:P/A:P |
8.6
|
6.4
|
nvd@nist.gov |
|
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
|
nvd@nist.gov |
|
9.0
|
CRITICAL | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H |
2.2
|
6.0
|
security@synology.com |
CWE ids for CVE-2021-26561
-
The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer.Assigned by: nvd@nist.gov (Primary)
-
A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).Assigned by: security@synology.com (Secondary)
References for CVE-2021-26561
-
https://www.synology.com/security/advisory/Synology_SA_20_26
Synology Inc.Vendor Advisory
-
https://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1159
TALOS-2020-1159 || Cisco Talos Intelligence Group - Comprehensive Threat IntelligenceExploit;Third Party Advisory
Products affected by CVE-2021-26561
- cpe:2.3:a:synology:diskstation_manager:*:*:*:*:*:*:*:*
- cpe:2.3:o:synology:vs960hd_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:synology:skynas_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:synology:diskstation_manager_unified_controller:3.0:*:*:*:*:*:*:*