The Cyrillic Modern fonts are based on the Computer Modern fonts designed in METAFONT by D. E. Knuth and released in the Type 1 format by the American Mathematical Society under the SIL Open Font License (OFL). The Cyrillic Modern fonts are intended to make the Cyrillic letters with classical shapes typical to the modern fonts. Currently, the fonts add support for the Russian language, the numero sign and quotation marks required for the Russian typesetting. Several Latin letters are changed making the Cyrillic Modern fonts closer to modern-style fonts, in particular, to Monotype Modern. So, these fonts break metric compatibility with the Computer Modern fonts. For consistency, the modified mathematical italic fonts are provided.