CivetWeb Vulnerabilities in Ubuntu Lead to Denial of Service Risks

Linuxsecurity

CivetWeb Vulnerabilities in Ubuntu Lead to Denial of Service Risks

First seen 14 Sep 2026, 06:41 UTC • •45.9

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ThreatCluster •September 14, 2026 at 08:12 UTC

•CivetWeb vulnerabilities could lead to denial of service or arbitrary code execution.
•Affected systems include Ubuntu 22.04 LTS and 24.04 LTS.
•Immediate updates are recommended to mitigate risks.

Multiple vulnerabilities were discovered in CivetWeb, an embeddable web server, affecting Ubuntu 22.04 LTS and 24.04 LTS. The issues include improper URI parsing (CVE-2025-55763) and HTTP request handling (CVE-2025-9648), which could allow remote attackers to cause denial of service or execute arbitrary code. The vulnerabilities were published on August 29, 2025, and September 29, 2025, respectively. Users are advised to update to the latest package versions to mitigate these risks. The vulnerabilities are significant as they may impact the availability and security of systems running CivetWeb. Administrators are urged to restart the CivetWeb service after applying updates to ensure changes take effect.

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Timeline

2025-08-29

CVE-2025-55763 published

CivetWeb vulnerability discovered allowing denial of service or arbitrary code execution via improper URI parsing.

2025-09-29

CVE-2025-9648 published

CivetWeb vulnerability identified for improper HTTP request handling leading to denial of service.

2026-09-14

Advisories published

Ubuntu and Linuxsecurity released advisories regarding CivetWeb vulnerabilities, urging users to update.

More articles in this cluster (2)

Threat Graph

6 entities, 5 inferred relationships (STIX 2.1).

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Technique (2)

DDoS
Denial of Service

Organization (1)

Ubuntu

Vulnerability (2)

CVE-2025-55763
CVE-2025-9648

Affected Platform (1)

Linux

Relationships

CVE-2025-55763 targets Linux
CVE-2025-9648 targets Linux
DDoS targets Linux
Denial of Service targets Linux
CVE-2025-55763 related to Ubuntu

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