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Threats Tagged 'cve-2026-25961'

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Active filters (1):Tag: cve-2026-25961

Threats Tagged 'cve-2026-25961'

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CVE-2026-25961 is a high-severity vulnerability in SumatraPDF versions 3.5.0 through 3.5.2 affecting its update mechanism. The flaw disables TLS hostname verification during update checks and executes installers without verifying their digital signatures. This allows a network attacker with any valid TLS certificate, including free certificates like Let's Encrypt, to intercept update requests and inject malicious installer URLs. Successful exploitation results in arbitrary code execution on the victim's Windows system. No known exploits are currently reported in the wild. The vulnerability impacts confidentiality, integrity, and availability due to the potential for full system compromise.

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