CVE-2025-34468 is a critical stack-based buffer overflow vulnerability affecting libcoap versions up to 4.3.5, prior to commit 30db3ea. This flaw occurs during address resolution when attacker-controlled hostname data exceeds a fixed 256-byte buffer, requiring the proxy logic to be enabled in applications using libcoap. With a CVSS score of 9.8, this vulnerability allows a remote, unauthenticated attacker to trigger a denial of service and potentially achieve remote code execution. Currently, there is no known active exploitation, public exploit code, or significant community discussion surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
<= 4.3.5CPE matchmatch criteria | cpe:2.3:a:libcoap:libcoap:*:*:*:*:*:*:*:* | ||
>= 0, <= 4.3.5CPE match | cpe:2.3:a:libcoap:libcoap:*:*:*:*:*:*:*:* |
CVSS version used by this source: 4.0
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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.