CVE-2021-26564 is a high-severity vulnerability affecting Synology DiskStation Manager (DSM) and related products, allowing cleartext transmission of sensitive information via synorelayd. This flaw enables man-in-the-middle attackers to spoof servers through HTTP sessions due to the absence of encryption. With a CVSS score of 8.7 (High), the vulnerability is remotely exploitable with high impact on confidentiality and integrity, but requires high attack complexity. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 6.2.3-25426-3CPE matchmatch criteria | cpe:2.3:o:synology:diskstation_manager:*:*:*:*:*:*:*:* | ||
Range not provided by sourceCPE matchmatch criteria | cpe:2.3:o:synology:vs960hd_firmware:-:*:*:*:*:*:*:* | ||
Range not provided by sourceCPE matchmatch criteria | cpe:2.3:o:synology:skynas_firmware:-:*:*:*:*:*:*:* | ||
3.0CPE matchmatch criteria | cpe:2.3:o:synology:diskstation_manager_unified_controller:3.0:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.