medium SHARE_COUNT_MISREAD_RISK
CSCO: reading balanceOf() as shares understates by 0.2668% (multiplier 1.002674650x)
Who carries the exposure
Any integrator that presents CSCO balanceOf() as a share count. The contract itself is behaving as ERC-8056 specifies and is not at fault.
The contract named above is what was READ. Naming it is not an accusation against it: a Stock Token that moves uiMultiplier() is doing what ERC-8056 specifies.
CSCO reports uiMultiplier() = 1002674650028132112 (1.002674650), which is CORRECT AND SPEC-COMPLIANT behaviour under ERC-8056 — this finding is not a defect in the token contract. It records the exposure carried by a caller that reads balanceOf() as shares. Under ERC-8056 a corporate action moves the multiplier rather than balances, so balanceOf() returns tokens and share-equivalents = balance * uiMultiplier() / 1e18. A surface presenting the raw balance as a share count understates it by 0.2668% (the true count is 1.0027x the raw balance). Token value computed as balance * Chainlink feed price is unaffected, because the feed is already multiplier-adjusted.
Impact
0.2668%
totalSupply raw 75.3669 tokens vs 75.5684 share-equivalents (delta 0.2015). Presenting the raw balance as a share count understates by 0.2668%; equivalently the true count is 1.0027x the raw.
Evidence — 2/2 citations re-fetched and byte-compared
uiMultiplier() == 1002674650028132112
0x0000000000000000000000000000000000000000000000000dea374824374710
totalSupply() == 75366919860000000000
0x00000000000000000000000000000000000000000000000415ed164d36a20800
Right of reply
No reply has been received for this finding. Anyone named here can have a response published verbatim and unedited alongside it. A finding shown to be wrong is corrected by changing the rule that produced it, with the notice recorded in the repository. Open a right-of-reply issue or see docs/RIGHT-OF-REPLY.md. Pre-publication notice is deliberately not claimed: the sweep publishes on a timer and for most findings the subject is a contract, not a person to notify.