| V0calist | V0l4arrra | V1n1v131r4 |
| V1per-haCker | V3n0m | V4lkyrius |
| V4mu | V9 | Vacuum |
| Vade79 | Vadim Kolontsov | Vadym Soroka |
| Vafa Khoshaein | Vagrant | Vahagn Vardanyan |
| Vahid Ezraeil | Vaibhav Gupta | Vaisha Bernard |
| VALDEUX | Valentijn | Valentin |
| Valentin Hoebel | Valentin Lobstein | Valentin Perelogin |
| Valerio Alessandroni | Valerio Brussani | Valerio Casalino |
| Valgasu | Vampire | Vampz |
| Vanja Hrustic | Vanshal Gaur | Vapid Labs |
| Varang Amin | Vartamtezidis Theodoros | Vartamtzidis Theodoros |
| Varun Bagaria | Varun Srivastava | Vasiliy Kulikov |
| Vasodipandora | Vasu | VB |
| VBmad | VCore | Vds S |
| Veerababu Penugonda | Veerendra G.G | Vegard Nossum |
| Vegas78 | Veit Hailperin | Ven3xy |
| Venglin | Venkat Rajgor | VeNoMouS |
| Vertex | Vertygo | VerY-SecReT |
| Vesche | Veshraj Ghimire | Vex Woo |
| Veysel HATAS | Vicente Aguilera Diaz | ViciOuS |
| Vickenty Fesunov | Victor A. Morales | Victor Garcia |
| Victor Gil | Victor Hanna | Victor Pereira |
| Victor Stinner | VietMafia | Vietnamese Security Group |
| Vigilon | Vijayv | Vikas Chaudhary |
| Vikas Khanna | Vikas Singhal | Vikingfr |
| Viktor Fougstedt | Viktor Minin | Viktor Steinmann |
| Vilius Povilaika | Villy | Vincent Lafevre |
| Vincent Malguy | Vince Weaver | Vingroup |
| Vinicius777 | Vinicius Moraes | Vinod Sharma |
| ViPeR | ViperSV | VIPER SV |
| ViP HaCKEr | Vipin Chaudhary | Vipsta |
| Vipsta/MurderSkillz | Vir0e5 | Virangar Security |
| Virginity Security | Virtualcat | V[i]RuS |
| ViRuS HaCkErS | ViRuSMaN | ViRuS Qalaa |
| Vishnudevtj | Vishwaraj101 | Visi0n |
| Visus | Vitalii Rudnykh | Vitaliy Toropov |
| Vitaly Nikolenko | Vitux | Vivek Choudhary |
| Vivek Infosec | VizibleSoft | Viz.security |
| Vkhoshain | Vl4dZ | Vlad902 |
| Vladii | Vladimir Katalov | Vladimir Perepelitsa |
| Vladimir Vorontsov | Vlad Ovtchinikov | Vlad Vector |
| Vladz | Vleminator | VMware |
| Void | Voidloafer | Volema |
| Vortfu | Vort-fu | Vosec |
| Voulnet | Voyag3r | VP4TR10T |
| V. Paulikas | Vpnmentor | Vportal |
| Vrs-hCk | Vr System | Vsecurity.com |
| VSN | Vsz | Vulnc0d3 |
| Vulnc0d3c | Vulnerability-Lab | Vulnerability Laboratory |
| Vulnerability Research Laboratory | Vuln@hexview.com | VulnSpy |
| Vulp1n3 | VVVSecurity | VYc0d |
| Vympel | Vytis Fedaravicius | |
Vulmon