This site shows the linkability of Monero:

https://monerolink.com/

Note the above is without the additional vulnerabilities which @AnonyMint detailed. Thus even 10 ring sigs mixes may be still insufficient.

More details:

https://steemit.com/shadowbrokers/@zooko/re-synapse-re-crazyflashpie-re-synapse-re-demotruk-re-synapse-re-theshadowbrokers-theshadowbrokers-monthly-dump-service-june-2017-update-20170606t153120581z

P.S. Zooko-Wilcox the CEO and lead dev of Zcash commented on AnonyMint’s blog.