Some of the Epicurean assertions about what pleasure was make the bare assertion misleading without further explanation:

Epicurus's Principal Doctrines:

The magnitude of pleasure reaches its limit in the removal of all pain.

but it isn't wrong. Epicurus's Letter to Menoeceus:

For the end of all our actions is to be free from pain and fear, and, when once we have attained all this, the tempest of the soul is laid; seeing that the living creature has no need to go in search of something that is lacking, nor to look anything else by which the good of the soul and of the body will be fulfilled. When we are pained pleasure, then, and then only, do we feel the need of pleasure. For this reason we call pleasure the alpha and omega of a happy life. Pleasure is our first and kindred good.

It might be clearer to simply state that Epicurus thought that the removal of pain was the greatest good, and leave pleasure out of it, but the introduction of pleasure into the discussion is entirely attributable to Epicurus himself -- no need to blame Cicero et al. for it. Cicero's discussion seems pretty much in line with what Epicurus himself wrote. From the standpoint of Cicero and the Stoics, it makes little difference anyway, as in both cases virtue is the slave of personal feeling, while they (Cicero and the Stoics) considered it the ultimate good, unmotivated by anything else.