CVE-2021-27734 is a critical vulnerability affecting Hirschmann HiOS and HiSecOS, allowing remote, unauthenticated attackers to alter existing user credentials. With a CVSS score of 9.8, this flaw presents a high risk due to its network-based attack vector, low complexity, and complete compromise of confidentiality, integrity, and availability. Despite its severity, there is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 08.1.00, < 08.6.00CPE matchmatch criteria | cpe:2.3:o:belden:hirschmann_hios:*:*:*:*:*:*:*:* | ||
07.1.01CPE matchmatch criteria | cpe:2.3:o:belden:hirschmann_hios:07.1.01:*:*:*:*:*:*:* | ||
07.1.02CPE matchmatch criteria | cpe:2.3:o:belden:hirschmann_hios:07.1.02:*:*:*:*:*:*:* | ||
>= 03.3.00, <= 03.5.01CPE matchmatch criteria | cpe:2.3:o:belden:hisecos:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.