CVE-2023-44487

high Apache ⚠️ CISA KEV — Exploited in the Wild
CVSS v3 Base Score
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score
94.4%
Exploitation probability in 30 days
Top 0% most likely to be exploited
Attack Characteristics
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Confidentiality
None
Integrity
None
Availability
High
Published: October 10, 2023 (946 days ago)
Last Modified: May 12, 2026
Vendor: Apache
Source: NVD

⚠️ CISA Known Exploited Vulnerability

Added to KEV: 2023-10-10
Remediation Due: 2023-10-31 (⚠ 926d overdue)

Description

The HTTP/2 protocol allows a denial of service (server resource consumption) because request cancellation can reset many streams quickly, as exploited in the wild in August through October 2023.

CWE

NVD-CWE-noinfo

Affected Products

siemens simatic s7-1500 cpu 1518f-4 pn\/dp mfp firmwaresiemens sinec inssiemens sinec nmssiemens st7 scadaconnectsiemens ruggedcom ape1808 firmwaresiemens simatic s7-1500 cpu 1518-4 pn\/dp mfp firmwaresiemens siplus s7-1500 cpu 1518-4 pn\/dp mfp firmwareietf httpnghttp2 nghttp2netty netty

References

🔗 www.openwall.com 🔗 www.openwall.com 🔗 www.openwall.com 🔗 www.openwall.com 🔗 www.openwall.com