CVE-2021-33903 is a high-severity vulnerability affecting LANCOM LCOS versions 10.40 to 10.42.0473-RU3, specifically when SNMPv3 is enabled. The flaw allows an authenticated attacker to maintain SNMPv3 root access even after the root user's password is changed via the CLI, as this change is not propagated to the SNMPv3 configuration. This presents a significant risk (CVSS 8.8) as it can lead to full compromise of confidentiality, integrity, and availability. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 10.40, < 10.42.0473CPE matchmatch criteria | cpe:2.3:o:lancom-systems:lcos:*:*:*:*:*:*:*:* | ||
10.42.0473CPE matchmatch criteria | cpe:2.3:o:lancom-systems:lcos:10.42.0473:-:*:*:*:*:*:* | ||
10.42.0473CPE matchmatch criteria | cpe:2.3:o:lancom-systems:lcos:10.42.0473:release_update1:*:*:*:*:*:* | ||
10.42.0473CPE matchmatch criteria | cpe:2.3:o:lancom-systems:lcos:10.42.0473:release_update2:*:*:*:*:*:* | ||
10.42.0473CPE matchmatch criteria | cpe:2.3:o:lancom-systems:lcos:10.42.0473:release_update3:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 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.