CVE-2025-59777 describes a NULL pointer dereference vulnerability in GNU libmicrohttpd versions 1.0.2 and earlier. A remote, unauthenticated attacker can exploit this flaw by sending a specially crafted packet, leading to a denial-of-service condition. The vulnerability has a CVSS score of 7.5 (High) due to its network-based attack vector and low attack complexity, with the primary impact being system availability. While a fix exists in a later commit, there is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 2025-09-16CPE matchmatch criteria | cpe:2.3:a:gnu:libmicrohttpd:*:*:*:*:*:*:*:* |
CVSS version used by this source: 4.0
CVSS:4.0/AV:N/AC:L/AT:N/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
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The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
NULL pointer dereference vulnerability exists in GNU libmicrohttpd v1.0.2 and earlier. The vulnerability was fixed in commit ff13abc on the master branch of the libmicrohttpd Git repository, after the v1.0.2 tag. A specially crafted packet sent by an attacker could cause a denial-of-service (DoS) condition.
Nov 11, 2025libmicrohttpd: GNU libmicrohttpd null pointer dereference
Nov 10, 2025