Is CVE-2023-44487 actively exploited?

Yes. CVE-2023-44487 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, which means exploitation in the wild has been confirmed.

Can CVE-2023-44487 be exploited remotely?

The attack vector of CVE-2023-44487 has not been classified yet.

What is the CVSS score of CVE-2023-44487?

CVE-2023-44487 has not received a CVSS score yet.

HOME VULNERABILITIESCVE-2023-44487

HIGHCISA KEVIN THE WILD

CVE-2023-44487

Published: October 10, 2023

EPSS:94.40%probability of exploitation in 30 daysPercentile:100.0th

Official Description

HTTP/2 contains a rapid reset vulnerability that allows for a distributed denial-of-service attack (DDoS).

NVD Source

CISA KEV Advisory

HTTP/2 Rapid Reset Attack Vulnerability

HTTP/2 contains a rapid reset vulnerability that allows for a distributed denial-of-service attack (DDoS).

Added to KEV: 2023-10-10Federal patch deadline: 2023-10-31

Required Action (CISA)

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Risk Analysis

This HTTP/2 rapid reset vulnerability enables distributed denial-of-service (DDoS) attacks, potentially disrupting service availability. The very high EPSS score indicates a strong likelihood of exploitation, and its inclusion in CISA's KEV confirms active exploitation, making this a critical and urgent issue.

Active exploitation of this vulnerability has been observed in the wild, indicating that working exploits are readily available and being used by attackers. This flaw is remotely exploitable.

Recommended Action

Implement HTTP/2 rapid reset attack mitigations at the network edge, such as rate limiting and connection management. Ensure all web servers and proxies are updated to versions that address this vulnerability.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2023-44487 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CISA has added CVE-2023-44487 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.