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CVE-2013-2566 concerns cryptographic weaknesses in the RC4 stream cipher when RC4-based cipher suites are negotiated for TLS or SSL. RC4 exhibits exploitable single-byte output biases. An attacker able to collect ciphertext from a large number of sessions carrying repeated plaintext can apply statistical analysis to infer portions of that plaintext.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
3 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A legacy cryptography weakness involving RC4 encryption, highlighted as the most frequently detected CVE in the report’s network vulnerability findings.
An RC4-related TLS weakness referenced in test output showing no RC4 ciphers are enabled.
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.