Buffer Overflow in the URI parser of CivetWeb 1.14 through 1.16 (latest) allows a remote…
Priority HIGH 66CWE-121Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-121 and the CVSS impact.
Summary
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.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.01198 68th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:civetweb_project:civetweb:*:*:*:*:*:*:*:* | 1.14 – 1.16 | Vulnerable | civetweb_project |
- cpe:2.3:a:civetweb_project:civetweb:*:*:*:*:*:*:*:* Versions 1.14 – 1.16 Vulnerable ·civetweb_project
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2025-55763
- 2026-10-03 Alias added: GHSA-2757-2hpv-v482
References
More civetweb_project Civetweb vulnerabilities
- TI-2020-16622 Path traversal in civetweb_project civetweb CVSS 3.1CRITICAL 9.8
- TI-2026-05070 Search path without quotes in CivetWeb CVSS 4.0HIGH 8.5
- TI-2018-09103 Out-of-bounds Read in the send_ssi_file function in civetweb.c in CivetWeb through 1.10… CVSS 3.0HIGH 7.1
Sources
- CVE-2025-55763 · CVE Program
- CVE-2025-55763 · NVD
- FIRST EPSS
- GHSA-2757-2hpv-v482 · GitHub Advisory Database · CC BY 4.0
- CVE-2025-55763 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences