Comparison Overview
Graham Holdings Company

Graham Holdings Company
1300 17th St N, Arlington, 22209, US
Last Update: 04/04/2026
Headquartered in Arlington, Va., Graham Holdings Company (NYSE:GHC) is a diversified holding company whose operations include: educational services, home health and hospice care, television broadcasting, online, print and local TV news, automotive dealerships, manufactu...

Chicago Public Schools
42 West Madison Street, Chicago, 60602, US
Last Update: 31/03/2026
Chicago Public Schools is looking for teachers, leaders, and non-instructional staff to transform the face of urban education. We are a team of passionate, committed, and talented professionals who believe that every CPS student will graduate prepared for success in col...
Compliance Ranges Comparison

Graham Holdings Company







Chicago Public Schools






Benchmark & Cyber Underwriting Signals
Incidents vs Education Administration Programs Industry Avg (This Year)
Graham Holdings Company has 43.82% fewer incidents than the average of same-industry companies with at least one recorded incident.
Incidents vs Education Administration Programs Industry Avg (This Year)
No incidents recorded for Chicago Public Schools in 2026.
Incident History - Graham Holdings Company (X = Date, Y = Severity)
Graham Holdings Company cyber incidents detection timeline including parent company and subsidiaries.
Incident History - Chicago Public Schools (X = Date, Y = Severity)
Chicago Public Schools cyber incidents detection timeline including parent company and subsidiaries.
Notable Incidents

Graham Holdings Company

Chicago Public Schools
FAQ
Latest Global CVEs
An authentication bypass vulnerability exists in certain releases of Ciena Navigator Network Control Suite (NCS), Manage Control Plan (MCP), and Blue Planet products. The issue is caused by improper handling of HTTP request paths and headers, which allows an unauthenticated attacker to manipulate requests in a manner that bypasses authentication and associated audit logging controls.
In Ciena's Navigator Network Control Suite (NCS) and Manage Control Plan (MCP), there are hidden system accounts used for internal software operations. Some of these accounts have default passwords that may be predictable. While these accounts have very limited permissions on their own, an attacker could combine an attack using one of these accounts with other potential weaknesses to launch a more significant attack, possibly leading to escalation of privilege on the system.
Buffer Overflow vulnerability in OpenHTJ2K v.0.18.4 and before allows an attacker to execute arbitrary code via the openhtj2k_decoder_impl::invoke, invoke_line_based, invoke_line_based_stream, and invoke_line_based_predecoded function in source/core/interface/decoder.cpp
Buffer Overflow vulnerability in OpenHTJ2K v.0.18.4 and before allows an attacker to execute arbitrary code via the j2k_precinct_subband::parse_packet_header() in source/core/coding/coding_units.cpp
Incorrect access control in the /api/License/deactivateOffline endpoint of CAXPerts UniversalPlantViewer WebServices Server v2.7.6 allows authenticated attackers with low-level privileges to cause a Denial of Service (DoS) via removing the license from the webserver.