CWE-20Class48 in KEV

Improper Input Validation

Stable in the CWE catalog · 5,213 CVEs mapped

5,213
CVEs mapped
48
In KEV
7.2
Median CVSS
What it is

The product receives input or data, but it does

not validate or incorrectly validates that the input has the

properties that are required to process the data safely and

correctly.

Recent examples
4.6cvss
CVE-2026-115249

subhajitkhan online-clinic-management-system Appointment Booking patappointtime.php input validation

A flaw has been found in subhajitkhan online-clinic-management-system up to e9ee77a8827a1446220fa07ee693dc4d9a29a578. Impacted is an unknown function of the file patappointtime.php of the component Appointment Booking. This manipulation of the argument day/time/appdate causes improper input validation. The attack can be initiated remotely. The exploit has been published and may be used. The project was informed of the problem early through an issue report but has not responded yet.

MEDIUMno explanation yet
—
epss
7.5cvss
CVE-2026-76505

CVE-2026-76505 - HIGH Severity Vulnerability

A vulnerability in the IPv4 packet processing functionality of Cisco IOS XR Software that affects Cisco ASR 9000 and 9900 Series Aggregation Services Routers as well as Cisco ASR 9902 and 9903 Compact High-Performance Routers could allow an unauthenticated, remote attacker to cause network processor (NP) errors, resulting in a line card reset or shutdown and a denial of service (DoS) condition.  This vulnerability is due to the incorrect handling of crafted IPv4 packets that are received on an affected line card interface and processed as for-us traffic. The issue can result in an NP reset, causing traffic loss on the affected line card while it recovers. Under repeated reset conditions, the network processor may enter a persistent shutdown state, in which case an explicit line card reload may be required to restore traffic. The vulnerability is within the IPv4 packet-processing path. Transit IPv4 traffic does not trigger this issue and IPv6 traffic cannot trigger it.

HIGHno explanation yet
—
epss
8.8cvss
CVE-2026-76476

CVE-2026-76476 - HIGH Severity Vulnerability

As part of Cisco's ongoing commitment to proactive security and product quality, engineering teams for Cisco Emergency Responder, Cisco Prime Collaboration Deployment, Cisco Unified Communications Manager (Unified CM), Cisco Unified Communications Manager IM & Presence Service (Unified CM IM&P), Cisco Unified Communications Manager Session Management Edition (Unified CM SME), and Cisco Unity Connection have conducted a comprehensive internal security review. This review resulted in software hardening releases that address multiple internally discovered vulnerabilities.   The vulnerabilities tracked by CVE-2026-76476 are related to issues concerning improper input validation that are grouped under the Common Weakness Enumeration (CWE) Class CWE-20.

HIGHno explanation yet
—
epss
The record
Technical detail
CWE ID
CWE-20
Abstraction
Class
Structure
Simple
Status
Stable
References (11)