CVE-2025-55763
highpriority · track · 10EPSS 0.012 · 68 %ileexploit · PoCEUUSEPSS · scored 2026-10-28
Buffer Overflow in the URI parser of CivetWeb 1.14 through 1.16 (latest) allows a remote attacker to achieve remote code execution via a crafted HTTP request. This vulnerability is triggered during request processing and may allow an attacker to corrupt heap memory, potentially leading to denial of service or arbitrary code execution.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
exploits (1)
Public proof-of-concept and weaponised exploit code.
- krispybyte/CVE-2025-55763Heap overflow PoC for CivetWeb CVE-2025-55763PoC · poc_in_github
affected products (2)
Products and version ranges known to be affected.
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (8)
External citations — patches, advisories, analysis.
- https://github.com/civetweb/civetwebcnnvd
- https://github.com/krispybyte/CVE-2025-55763cnnvd
- https://nvd.nist.gov/vuln/detail/CVE-2025-55763cnnvd
- https://vigilance.fr/vulnerability/CivetWeb-buffer-overflow-via-URI-Parser-48213cnnvd
- https://github.com/civetweb/civetwebenisa_euvd
- https://github.com/krispybyte/CVE-2025-55763enisa_euvd
- https://github.com/civetweb/civetwebProductnvd
- https://github.com/krispybyte/CVE-2025-55763ExploitThird Party Advisorynvd
Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.
Free scan