CVE-2021-0251 is a NULL Pointer Dereference vulnerability in the Captive Portal Content Delivery (CPCD) services daemon of Juniper Networks Junos OS on MX Series devices with specific MS-PIC, MS-SPC3, MS-MIC, or MS-MPC cards. An unauthenticated attacker can send malformed HTTP packets to the device, leading to a Denial of Service (DoS) by crashing the mspmand process and impacting other services. The vulnerability has a CVSS v3.1 score of 8.6 (High), indicating a network-based attack with low complexity and high impact on availability. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 18.1, < 18.1R3-S9CPE match | cpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:* | ||
>= 18.2, < 18.2R3-S3CPE match | cpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:* | ||
>= 18.3, < 18.3R3-S1CPE match | cpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:* | ||
>= 18.4, < 18.4R3CPE match | cpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:* | ||
>= 19.2, < 19.2R2CPE match | cpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 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.