Vulnerability Database

296,213

Total vulnerabilities in the database

CVE-2021-0261

A vulnerability in the HTTP/HTTPS service used by J-Web, Web Authentication, Dynamic-VPN (DVPN), Firewall Authentication Pass-Through with Web-Redirect, and Captive Portal allows an unauthenticated attacker to cause an extended Denial of Service (DoS) for these services by sending a high number of specific requests. This issue affects: Juniper Networks Junos OS 12.3 versions prior to 12.3R12-S17 on EX Series; 12.3X48 versions prior to 12.3X48-D105 on SRX Series; 15.1 versions prior to 15.1R7-S8; 15.1X49 versions prior to 15.1X49-D230 on SRX Series; 16.1 versions prior to 16.1R7-S8; 17.4 versions prior to 17.4R2-S12, 17.4R3-S3; 18.1 versions prior to 18.1R3-S11; 18.2 versions prior to 18.2R3-S6; 18.3 versions prior to 18.3R2-S4, 18.3R3-S3; 18.4 versions prior to 18.4R2-S5, 18.4R3-S4; 19.1 versions prior to 19.1R2-S2, 19.1R3-S2; 19.2 versions prior to 19.2R1-S5, 19.2R3; 19.3 versions prior to 19.3R2-S4, 19.3R3; 19.4 versions prior to 19.4R1-S3, 19.4R2-S2, 19.4R3; 20.1 versions prior to 20.1R1-S3, 20.1R2; 20.2 versions prior to 20.2R1-S1, 20.2R2.

  • Published: Apr 22, 2021
  • Updated: May 4, 2025
  • CVE: CVE-2021-0261
  • Severity: Medium
  • Exploit:

CVSS v2:

  • Severity: Medium
  • Score: 5
  • AV:N/AC:L/Au:N/C:N/I:N/A:P

No CWE or OWASP classifications available.

Software From Fixed in
juniper / junos 12.3-r11 12.3-r11.x
juniper / junos 12.3-r1 12.3-r1.x
juniper / junos 12.3-r12 12.3-r12.x
juniper / junos 12.3-r10 12.3-r10.x
juniper / junos 12.3-r12-s10 12.3-r12-s10.x
juniper / junos 12.3-r12-s8 12.3-r12-s8.x
juniper / junos 12.3 12.3.x
juniper / junos 12.3-r12-s13 12.3-r12-s13.x
juniper / junos 12.3-r12-s14 12.3-r12-s14.x
juniper / junos 12.3-r12-s1 12.3-r12-s1.x
juniper / junos 12.3-r12-s3 12.3-r12-s3.x
juniper / junos 12.3-r12-s4 12.3-r12-s4.x
juniper / junos 12.3-r12-s6 12.3-r12-s6.x
juniper / junos 12.3-r12-s11 12.3-r12-s11.x
juniper / junos 12.3-r12-s12 12.3-r12-s12.x
juniper / junos 12.3-r10-s1 12.3-r10-s1.x
juniper / junos 12.3-r10-s2 12.3-r10-s2.x
juniper / junos 12.3-r12-s15 12.3-r12-s15.x
juniper / junos 12.3-r12-s16 12.3-r12-s16.x
juniper / junos 12.3x48-d15 12.3x48-d15.x
juniper / junos 12.3x48-d35 12.3x48-d35.x
juniper / junos 12.3x48-d50 12.3x48-d50.x
juniper / junos 12.3x48-d30 12.3x48-d30.x
juniper / junos 12.3x48-d25 12.3x48-d25.x
juniper / junos 12.3x48-d45 12.3x48-d45.x
juniper / junos 12.3x48-d55 12.3x48-d55.x
juniper / junos 12.3x48-d20 12.3x48-d20.x
juniper / junos 12.3x48-d10 12.3x48-d10.x
juniper / junos 12.3x48-d40 12.3x48-d40.x
juniper / junos 12.3x48-d60 12.3x48-d60.x
juniper / junos 12.3x48-d65 12.3x48-d65.x
juniper / junos 12.3x48-d70 12.3x48-d70.x
juniper / junos 12.3x48-d75 12.3x48-d75.x
juniper / junos 12.3x48-d66 12.3x48-d66.x
juniper / junos 12.3x48-d51 12.3x48-d51.x
juniper / junos 12.3x48-d80 12.3x48-d80.x
juniper / junos 12.3x48 12.3x48.x
juniper / junos 12.3x48-d85 12.3x48-d85.x
juniper / junos 12.3x48-d95 12.3x48-d95.x
juniper / junos 12.3x48-d90 12.3x48-d90.x
juniper / junos 12.3x48-d100 12.3x48-d100.x
juniper / junos 15.1x49-d190 15.1x49-d190.x
juniper / junos 15.1x49-d200 15.1x49-d200.x
juniper / junos 15.1x49-d210 15.1x49-d210.x
juniper / junos 15.1x49 15.1x49.x
juniper / junos 15.1x49-d180 15.1x49-d180.x
juniper / junos 15.1x49-d170 15.1x49-d170.x
juniper / junos 15.1x49-d150 15.1x49-d150.x
juniper / junos 15.1x49-d131 15.1x49-d131.x
juniper / junos 15.1x49-d160 15.1x49-d160.x
juniper / junos 15.1x49-d140 15.1x49-d140.x
juniper / junos 15.1x49-d120 15.1x49-d120.x
juniper / junos 15.1x49-d130 15.1x49-d130.x
juniper / junos 15.1x49-d25 15.1x49-d25.x
juniper / junos 15.1x49-d110 15.1x49-d110.x
juniper / junos 15.1x49-d60 15.1x49-d60.x
juniper / junos 15.1x49-d20 15.1x49-d20.x
juniper / junos 15.1x49-d10 15.1x49-d10.x
juniper / junos 15.1x49-d55 15.1x49-d55.x
juniper / junos 15.1x49-d15 15.1x49-d15.x
juniper / junos 15.1x49-d40 15.1x49-d40.x
juniper / junos 15.1x49-d35 15.1x49-d35.x
juniper / junos 15.1x49-d45 15.1x49-d45.x
juniper / junos 15.1x49-d75 15.1x49-d75.x
juniper / junos 15.1x49-d65 15.1x49-d65.x
juniper / junos 15.1x49-d90 15.1x49-d90.x
juniper / junos 15.1x49-d100 15.1x49-d100.x
juniper / junos 15.1x49-d50 15.1x49-d50.x
juniper / junos 15.1x49-d30 15.1x49-d30.x
juniper / junos 15.1x49-d70 15.1x49-d70.x
juniper / junos 15.1x49-d80 15.1x49-d80.x
juniper / junos 15.1-r7 15.1-r7.x
juniper / junos 16.1-r 16.1-r.x
juniper / junos 15.1-f1 15.1-f1.x
juniper / junos 15.1-f6-s4 15.1-f6-s4.x
juniper / junos 15.1-f2-s3 15.1-f2-s3.x
juniper / junos 15.1-f7 15.1-f7.x
juniper / junos 16.1-r1 16.1-r1.x
juniper / junos 15.1-r3 15.1-r3.x
juniper / junos 15.1-r 15.1-r.x
juniper / junos 15.1-f2-s2 15.1-f2-s2.x
juniper / junos 15.1-r6 15.1-r6.x
juniper / junos 15.1-f4 15.1-f4.x
juniper / junos 15.1-r4 15.1-r4.x
juniper / junos 15.1-f2-s4 15.1-f2-s4.x
juniper / junos 15.1-f5-s7 15.1-f5-s7.x
juniper / junos 15.1-f6-s7 15.1-f6-s7.x
juniper / junos 15.1-f6 15.1-f6.x
juniper / junos 15.1-f2 15.1-f2.x
juniper / junos 15.1-a1 15.1-a1.x
juniper / junos 16.1-r4-s4 16.1-r4-s4.x
juniper / junos 15.1-f3 15.1-f3.x
juniper / junos 15.1-r2 15.1-r2.x
juniper / junos 16.1-r4 16.1-r4.x
juniper / junos 15.1-r4-s7 15.1-r4-s7.x
juniper / junos 15.1-r4-s8 15.1-r4-s8.x
juniper / junos 16.1-r4-s3 16.1-r4-s3.x
juniper / junos 15.1-r5-s5 15.1-r5-s5.x
juniper / junos 15.1-r6-s1 15.1-r6-s1.x
juniper / junos 15.1-r5 15.1-r5.x
juniper / junos 15.1-r1 15.1-r1.x
juniper / junos 15.1-f2-s1 15.1-f2-s1.x
juniper / junos 15.1-r5-s1 15.1-r5-s1.x
juniper / junos 15.1-f5 15.1-f5.x
juniper / junos 16.1-r3 16.1-r3.x
juniper / junos 16.1-r5 16.1-r5.x
juniper / junos 16.1-r2 16.1-r2.x
juniper / junos 15.1-f6-s8 15.1-f6-s8.x
juniper / junos 15.1-r5-s3 15.1-r5-s3.x
juniper / junos 16.1-r6 16.1-r6.x
juniper / junos 17.3-r1 17.3-r1.x
juniper / junos 15.1-r5-s6 15.1-r5-s6.x
juniper / junos 15.1-r6-s2 15.1-r6-s2.x
juniper / junos 15.1-r6-s3 15.1-r6-s3.x
juniper / junos 15.1-r6-s4 15.1-r6-s4.x
juniper / junos 15.1-f6-s9 15.1-f6-s9.x
juniper / junos 15.1-r4-s9 15.1-r4-s9.x
juniper / junos 15.1-r6-s6 15.1-r6-s6.x
juniper / junos 16.1-r5-s4 16.1-r5-s4.x
juniper / junos 16.1-r6-s1 16.1-r6-s1.x
juniper / junos 16.1-r7 16.1-r7.x
juniper / junos 17.3-r2 17.3-r2.x
juniper / junos 17.4-r1 17.4-r1.x
juniper / junos 17.4-r2 17.4-r2.x
juniper / junos 15.1-f 15.1-f.x
juniper / junos 16.1-r4-s9 16.1-r4-s9.x
juniper / junos 16.1-r6-s3 16.1-r6-s3.x
juniper / junos 17.3-r2-s2 17.3-r2-s2.x
juniper / junos 17.3-r3 17.3-r3.x
juniper / junos 18.1-r1 18.1-r1.x
juniper / junos 15.1-f6-s3 15.1-f6-s3.x
juniper / junos 16.1-r4-s8 16.1-r4-s8.x
juniper / junos 18.1-r3 18.1-r3.x
juniper / junos 15.1-r7-s1 15.1-r7-s1.x
juniper / junos 16.1-r6-s4 16.1-r6-s4.x
juniper / junos 16.1-r6-s6 16.1-r6-s6.x
juniper / junos 15.1-f6-s10 15.1-f6-s10.x
juniper / junos 16.1-r3-s8 16.1-r3-s8.x
juniper / junos 17.3-r1-s4 17.3-r1-s4.x
juniper / junos 17.4-r1-s3 17.4-r1-s3.x
juniper / junos 18.1-r2 18.1-r2.x
juniper / junos 18.2-r1 18.2-r1.x
juniper / junos 16.1-r3-s10 16.1-r3-s10.x
juniper / junos 15.1-r7-s2 15.1-r7-s2.x
juniper / junos 15.1-r7-s3 15.1-r7-s3.x
juniper / junos 17.4-r2-s2 17.4-r2-s2.x
juniper / junos 17.4-r1-s1 17.4-r1-s1.x
juniper / junos 18.2 18.2.x
juniper / junos 18.2-r2-s1 18.2-r2-s1.x
juniper / junos 18.2-r2-s2 18.2-r2-s2.x
juniper / junos 18.2-r1-s3 18.2-r1-s3.x
juniper / junos 18.3-r1-s1 18.3-r1-s1.x
juniper / junos 17.3-r3-s1 17.3-r3-s1.x
juniper / junos 17.3-r3-s2 17.3-r3-s2.x
juniper / junos 17.4-r1-s2 17.4-r1-s2.x
juniper / junos 17.3-r2-s1 17.3-r2-s1.x
juniper / junos 18.3-r2 18.3-r2.x
juniper / junos 18.3-r1 18.3-r1.x
juniper / junos 17.4-r2-s1 17.4-r2-s1.x
juniper / junos 18.1-r2-s2 18.1-r2-s2.x
juniper / junos 15.1-f6-s2 15.1-f6-s2.x
juniper / junos 15.1-f6-s1 15.1-f6-s1.x
juniper / junos 15.1-f6-s5 15.1-f6-s5.x
juniper / junos 15.1-f6-s6 15.1-f6-s6.x
juniper / junos 18.4-r1 18.4-r1.x
juniper / junos 17.4 17.4.x
juniper / junos 18.1-r3-s4 18.1-r3-s4.x
juniper / junos 18.1-r3-s3 18.1-r3-s3.x
juniper / junos 18.1-r3-s2 18.1-r3-s2.x
juniper / junos 18.1 18.1.x
juniper / junos 18.1-r2-s1 18.1-r2-s1.x
juniper / junos 18.1-r2-s4 18.1-r2-s4.x
juniper / junos 15.1 15.1.x
juniper / junos 16.1 16.1.x
juniper / junos 17.3 17.3.x
juniper / junos 18.3-r1-s2 18.3-r1-s2.x
juniper / junos 18.3 18.3.x
juniper / junos 18.4 18.4.x
juniper / junos 17.4-r1-s5 17.4-r1-s5.x
juniper / junos 18.1-r3-s1 18.1-r3-s1.x
juniper / junos 17.3-r3-s3 17.3-r3-s3.x
juniper / junos 17.4-r1-s7 17.4-r1-s7.x
juniper / junos 16.1-r3-s11 16.1-r3-s11.x
juniper / junos 17.4-r1-s4 17.4-r1-s4.x
juniper / junos 18.4-r1-s1 18.4-r1-s1.x
juniper / junos 17.3-r3-s4 17.3-r3-s4.x
juniper / junos 17.3-r3-s5 17.3-r3-s5.x
juniper / junos 17.4-r2-s3 17.4-r2-s3.x
juniper / junos 17.4-r2-s4 17.4-r2-s4.x
juniper / junos 17.4-r1-s6 17.4-r1-s6.x
juniper / junos 18.1-r3-s5 18.1-r3-s5.x
juniper / junos 18.3-r1-s3 18.3-r1-s3.x
juniper / junos 18.2-r2-s3 18.2-r2-s3.x
juniper / junos 18.2-r2-s4 18.2-r2-s4.x
juniper / junos 18.3-r1-s4 18.3-r1-s4.x
juniper / junos 18.2-r1-s4 18.2-r1-s4.x
juniper / junos 18.2-r1-s5 18.2-r1-s5.x
juniper / junos 18.2-r2 18.2-r2.x
juniper / junos 17.3-r3-s6 17.3-r3-s6.x
juniper / junos 18.4-r1-s3 18.4-r1-s3.x
juniper / junos 18.4-r1-s4 18.4-r1-s4.x
juniper / junos 18.4-r1-s2 18.4-r1-s2.x
juniper / junos 19.1-r1 19.1-r1.x
juniper / junos 19.1 19.1.x
juniper / junos 17.3-r2-s3 17.3-r2-s3.x
juniper / junos 16.1-r7-s3 16.1-r7-s3.x
juniper / junos 16.1-r7-s4 16.1-r7-s4.x
juniper / junos 17.4-r2-s5 17.4-r2-s5.x
juniper / junos 17.4-r2-s6 17.4-r2-s6.x
juniper / junos 17.4-r2-s7 17.4-r2-s7.x
juniper / junos 19.2-r1 19.2-r1.x
juniper / junos 18.4-r2 18.4-r2.x
juniper / junos 18.2-r3 18.2-r3.x
juniper / junos 18.1-r3-s6 18.1-r3-s6.x
juniper / junos 18.1-r3-s7 18.1-r3-s7.x
juniper / junos 19.1-r1-s1 19.1-r1-s1.x
juniper / junos 19.1-r1-s3 19.1-r1-s3.x
juniper / junos 19.1-r1-s2 19.1-r1-s2.x
juniper / junos 15.1-r7-s4 15.1-r7-s4.x
juniper / junos 17.3-r1-s1 17.3-r1-s1.x
juniper / junos 15.1-r7-s5 15.1-r7-s5.x
juniper / junos 16.1-r7-s2 16.1-r7-s2.x
juniper / junos 18.2-r2-s5 18.2-r2-s5.x
juniper / junos 18.2-r2-s6 18.2-r2-s6.x
juniper / junos 18.4-r1-s5 18.4-r1-s5.x
juniper / junos 15.1-f6-s12 15.1-f6-s12.x
juniper / junos 19.2-r1-s1 19.2-r1-s1.x
juniper / junos 19.2-r1-s2 19.2-r1-s2.x
juniper / junos 18.3-r1-s5 18.3-r1-s5.x
juniper / junos 18.2-r3-s1 18.2-r3-s1.x
juniper / junos 16.1-r7-s5 16.1-r7-s5.x
juniper / junos 16.1-r4-s12 16.1-r4-s12.x
juniper / junos 16.1-r4-s6 16.1-r4-s6.x
juniper / junos 16.1-r4-s2 16.1-r4-s2.x
juniper / junos 17.3-r2-s4 17.3-r2-s4.x
juniper / junos 18.3-r2-s1 18.3-r2-s1.x
juniper / junos 18.3-r2-s2 18.3-r2-s2.x
juniper / junos 17.4-r2-s8 17.4-r2-s8.x
juniper / junos 18.4-r2-s1 18.4-r2-s1.x
juniper / junos 19.3 19.3.x
juniper / junos 19.3-r1 19.3-r1.x
juniper / junos 19.2 19.2.x
juniper / junos 18.4-r2-s2 18.4-r2-s2.x
juniper / junos 18.3-r1-s6 18.3-r1-s6.x
juniper / junos 18.2-r3-s2 18.2-r3-s2.x
juniper / junos 18.1-r3-s8 18.1-r3-s8.x
juniper / junos 19.2-r1-s3 19.2-r1-s3.x
juniper / junos 18.3-r3 18.3-r3.x
juniper / junos 16.1-r7-s6 16.1-r7-s6.x
juniper / junos 19.4-r1 19.4-r1.x
juniper / junos 19.3-r2 19.3-r2.x
juniper / junos 19.1-r2 19.1-r2.x
juniper / junos 18.4-r3 18.4-r3.x
juniper / junos 18.4-r2-s3 18.4-r2-s3.x
juniper / junos 18.3-r3-s1 18.3-r3-s1.x
juniper / junos 18.1-r3-s9 18.1-r3-s9.x
juniper / junos 17.3-r3-s7 17.3-r3-s7.x
juniper / junos 19.3-r2-s1 19.3-r2-s1.x
juniper / junos 19.3-r1-s1 19.3-r1-s1.x
juniper / junos 19.2-r1-s4 19.2-r1-s4.x
juniper / junos 20.1-r1 20.1-r1.x
juniper / junos 19.4-r1-s1 19.4-r1-s1.x
juniper / junos 19.3-r2-s2 19.3-r2-s2.x
juniper / junos 19.1-r1-s4 19.1-r1-s4.x
juniper / junos 18.4-r1-s6 18.4-r1-s6.x
juniper / junos 18.3-r2-s3 18.3-r2-s3.x
juniper / junos 18.2-r3-s3 18.2-r3-s3.x
juniper / junos 17.4-r2-s9 17.4-r2-s9.x
juniper / junos 17.4-r2-s10 17.4-r2-s10.x
juniper / junos 16.1-r7-s7 16.1-r7-s7.x
juniper / junos 15.1-r7-s7 15.1-r7-s7.x
juniper / junos 18.2-r3-s4 18.2-r3-s4.x
juniper / junos 17.3-r2-s5 17.3-r2-s5.x
juniper / junos 18.4-r3-s2 18.4-r3-s2.x
juniper / junos 18.4-r3-s1 18.4-r3-s1.x
juniper / junos 18.4-r2-s4 18.4-r2-s4.x
juniper / junos 19.1-r2-s1 19.1-r2-s1.x
juniper / junos 19.1-r3 19.1-r3.x
juniper / junos 19.1-r3-s1 19.1-r3-s1.x
juniper / junos 15.1-r7-s6 15.1-r7-s6.x
juniper / junos 19.4-r1-s2 19.4-r1-s2.x
juniper / junos 20.1-r1-s1 20.1-r1-s1.x
juniper / junos 20.2-r1 20.2-r1.x
juniper / junos 20.1-r1-s2 20.1-r1-s2.x
juniper / junos 19.4-r2 19.4-r2.x
juniper / junos 19.4-r2-s1 19.4-r2-s1.x
juniper / junos 19.3-r2-s3 19.3-r2-s3.x
juniper / junos 18.4-r3-s3 18.4-r3-s3.x
juniper / junos 18.2-r3-s5 18.2-r3-s5.x
juniper / junos 18.1-r3-s10 18.1-r3-s10.x
juniper / junos 18.3-r3-s2 18.3-r3-s2.x
juniper / junos 19.2-r2 19.2-r2.x
juniper / junos 17.3-r3-s8 17.3-r3-s8.x
juniper / junos 17.4-r2-s11 17.4-r2-s11.x
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juniper / junos 18.2-r1-s2 18.2-r1-s2.x