Quotes from Standard Chartered:
-Grexit looks unlikely, but the risk is not negligible. Under such a scenario, where Greece leaves the euro area but the EUR continues to exist and remains France's currency, there would be little reason for the current CFA franc system to change, as the CFA franc peg is essentially a monetary arrangement with France alone.
-The real economy of the CFA franc zone could also be impacted by any troubles in the euro-area, as the zone still depends on Europe (via various channels including trade, capital inflows, bank financing, foreign investment and even remittance or donor flows). But the peg should remain unaffected.