What is the CVSS score of CVE-2025-55763?

CVE-2025-55763 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. EPSS exploitation probability: 5.8%.

Which versions of Civetweb are affected by CVE-2025-55763?

Organizations using the URI parser of CivetWeb 1.14 face notable risk from CVE-2025-55763, a stack-based buffer overflow vulnerability rated CVSS 7.5.. A patch is available.

Is there a public PoC exploit available for CVE-2025-55763?

Yes, a public proof-of-concept exploit is available for CVE-2025-55763. Prioritise patching immediately. EPSS: 5.8%.

How to fix or mitigate CVE-2025-55763?

Within 7 days: Identify all affected systems running the URI parser of CivetWeb 1.14 and apply vendor patches promptly. If patching is delayed, consider network segmentation to limit exposure.

Civetweb CVE-2025-55763

HIGH

Stack-based Buffer Overflow (CWE-121)

2025-08-29 cve@mitre.org

RCE Buffer Overflow Denial Of Service Stack Overflow Suse Civetweb Civetweb Project

7.5

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.5 HIGH

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SUSE

HIGH

qualitative

Primary rating from NVD.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 19:09 vuln.today

PoC Detected

Sep 09, 2025 - 13:57 vuln.today

Public exploit code

CVE Published

Aug 29, 2025 - 17:15 nvd

HIGH 7.5

DescriptionCVE.org

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.

AnalysisAI

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. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified under CWE-121. 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. Affected products include: Civetweb Project Civetweb. Version information: through 1.16.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.