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CVE-2026-52749 is an improper-authentication vulnerability in Kaon AR2140X router firmware through version 4.2.17. The router issues session cookies in HTTP responses to unauthenticated requests, allowing a remote attacker to obtain a valid session identifier without credentials and bypass authentication. The authenticated session can then be used to access upgrade-related functionality and cause the router to issue HTTP GET requests to attacker-selected domains. The security status of firmware versions newer than 4.2.17 is unknown.
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No public exploit code observed for this vulnerability.
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An improper-authentication vulnerability in Kaon AR2140 router firmware that issues valid session cookies to unauthenticated HTTP requests, enabling authentication bypass and unauthorized use of upgrade-related functions, including forcing GET requests to arbitrary domains.
A reported vulnerability affecting Kaon AR2140 routers; no technical details are provided in the content.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.