title: Authentication Bypass Vulnerability in Web Server Function on MELSEC Series
description: Predictable Seed in Pseudo-Random Number Generator (PRNG) vulnerability in Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-xMy/z (x=32,64,80, y=T,R, z=ES,DS,ESS,DSS) with serial number 17X**** or later, and versions 1.280 and prior, Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-xMy/z (x=32,64,80, y=T,R, z=ES,DS,ESS,DSS) with serial number 179**** and prior, and versions 1.074 and prior, Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-xMy/z (x=32,64,96, y=T, z=D,DSS)) with serial number 17X**** or later, and versions 1.280 and prior, Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-xMy/z (x=32,64,96, y=T, z=D,DSS)) with serial number 179**** and prior, and versions 1.074 and prior, Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-32MT/DS-TS versions 1.280 and prior, Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-32MT/DSS-TS versions 1.280 and prior, Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-xMy/z (x=24,40,60, y=T,R, z=ES,ESS) versions 1.042 and prior, Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UJ-xMy/ES-A (x=24,40,60, y=T,R) versions 1.043 and prior, Mitsubishi Electric Corporation MELSEC iQ-F Series FX5S-xMy/z (x=30,40,60,80, y=T,R, z=ES,ESS) versions 1.003 and prior, Mitsubishi Electric Corporation MELSEC iQ-F Series FX5UC-32MR/DS-TS versions 1.280 and prior, Mitsubishi Electric Corporation MELSEC iQ-R Series R00/01/02CPU versions 33 and prior, Mitsubishi Electric Corporation MELSEC iQ-R Series R04/08/16/32/120(EN)CPU versions 66 and prior allows a remote unauthenticated attacker to access the Web server function by guessing the random numbers used for authentication from several used random numbers.
problem types: CWE-337 Predictable Seed in Pseudo-Random Number Generator (PRNG)
affected:
{
defaultStatus: unaffected
product: MELSEC iQ-F Series FX5U-32MT/ES
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: serial number 17X**** or later, and versions 1.280 and prior
status: affected, version: serial number 179**** and prior, and versions 1.074 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-F Series FX5U-64MT/ES
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: serial number 17X**** or later, and versions 1.280 and prior
status: affected, version: serial number 179**** and prior, and versions 1.074 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-F Seres FX5U-80MT/ES
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: serial number 17X**** or later, and versions 1.280 and prior
status: affected, version: serial number 179**** and prior, and versions 1.074 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-F Series FX5U-32MR/ES
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: serial number 17X**** or later, and versions 1.280 and prior
status: affected, version: serial number 179**** and prior, and versions 1.074 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-F Series FX5U-64MR/ES
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: serial number 17X**** or later, and versions 1.280 and prior
status: affected, version: serial number 179**** and prior, and versions 1.074 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-F Series FX5U-80MR/ES
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: serial number 17X**** or later, and versions 1.280 and prior
status: affected, version: serial number 179**** and prior, and versions 1.074 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-F Series FX5U-32MT/DS
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: serial number 17X**** or later, and versions 1.280 and prior
status: affected, version: serial number 179**** and prior, and versions 1.074 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-F Series FX5U-64MT/DS
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: serial number 17X**** or later, and versions 1.280 and prior
status: affected, version: serial number 179**** and prior, and versions 1.074 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-F Series FX5U-80MT/DS
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: serial number 17X**** or later, and versions 1.280 and prior
status: affected, version: serial number 179**** and prior, and versions 1.074 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-F Series FX5U-32MR/DS
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: serial number 17X**** or later, and versions 1.280 and prior
status: affected, version: serial number 179**** and prior, and versions 1.074 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-F Series FX5U-64MR/DS
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: serial number 17X**** or later, and versions 1.280 and prior
status: affected, version: serial number 179**** and prior, and versions 1.074 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-F Series FX5U-80MR/DS
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: serial number 17X**** or later, and versions 1.280 and prior
status: affected, version: serial number 179**** and prior, and versions 1.074 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-F Series FX5U-32MT/ESS
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: serial number 17X**** or later, and versions 1.280 and prior
status: affected, version: serial number 179**** and prior, and versions 1.074 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-F Series FX5U-64MT/ESS
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: serial number 17X**** or later, and versions 1.280 and prior
status: affected, version: serial number 179**** and prior, and versions 1.074 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-F Series FX5U-80MT/ESS
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: serial number 17X**** or later, and versions 1.280 and prior
status: affected, version: serial number 179**** and prior, and versions 1.074 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-F Series FX5U-32MT/DSS
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: serial number 17X**** or later, and versions 1.280 and prior
status: affected, version: serial number 179**** and prior, and versions 1.074 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-F Series FX5U-64MT/DSS
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: serial number 17X**** or later, and versions 1.280 and prior
status: affected, version: serial number 179**** and prior, and versions 1.074 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-F Series FX5U-80MT/DSS
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: serial number 17X**** or later, and versions 1.280 and prior
status: affected, version: serial number 179**** and prior, and versions 1.074 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-F Series FX5UC-32MT/D
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: serial number 17X**** or later, and versions 1.280 and prior
status: affected, version: serial number 179**** and prior, and versions 1.074 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-F Series FX5UC-64MT/D
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: serial number 17X**** or later, and versions 1.280 and prior
status: affected, version: serial number 179**** and prior, and versions 1.074 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-F Series FX5UC-96MT/D
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: serial number 17X**** or later, and versions 1.280 and prior
status: affected, version: serial number 179**** and prior, and versions 1.074 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-F Series FX5UC-32MT/DSS
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: serial number 17X**** or later, and versions 1.280 and prior
status: affected, version: serial number 179**** and prior, and versions 1.074 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-F Series FX5UC-64MT/DSS
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: serial number 17X**** or later, and versions 1.280 and prior
status: affected, version: serial number 179**** and prior, and versions 1.074 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-F Series FX5UC-96MT/DSS
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: serial number 17X**** or later, and versions 1.280 and prior
status: affected, version: serial number 179**** and prior, and versions 1.074 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-F Series FX5UC-32MT/DS-TS
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: versions 1.280 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-F Series FX5UC-32MT/DSS-TS
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: versions 1.280 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-F Series FX5UC-32MR/DS-TS
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: versions 1.280 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-R Series R00CPU
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: versions 33 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-R Series R01CPU
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: versions 33 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-R Series R02CPU
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: versions 33 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-R Series R04CPU
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: versions 66 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-R Series R08CPU
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: versions 66 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-R Series R16CPU
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: versions 66 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-R Series R32CPU
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: versions 66 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-R Series R120CPU
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: versions 66 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-R Series R04ENCPU
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: versions 66 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-R Series R08ENCPU
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: versions 66 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-R Series R16ENCPU
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: versions 66 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-R Series R32ENCPU
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: versions 66 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-R Series R120ENCPU
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: versions 66 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-F Series FX5UJ-24MT/ES
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: 1.042 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-F Series FX5UJ-40MT/ES
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: 1.042 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-F Series FX5UJ-60MT/ES
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: 1.042 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-F Series FX5UJ-24MR/ES
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: 1.042 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-F Series FX5UJ-40MR/ES
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: 1.042 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-F Series FX5UJ-60MR/ES
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: 1.042 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-F Series FX5UJ-24MT/ESS
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: 1.042 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-F Series FX5UJ-40MT/ESS
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: 1.042 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-F Series FX5UJ-60MT/ESS
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: 1.042 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-F Series FX5UJ-24MT/ES-A
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: 1.043 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-F Series FX5UJ-40MT/ES-A
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: 1.043 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-F Series FX5UJ-60MT/ES-A
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: 1.043 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-F Series FX5UJ-24MR/ES-A
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: 1.043 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-F Series FX5UJ-40MR/ES-A
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: 1.043 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-F Series FX5UJ-60MR/ES-A
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: 1.043 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-F Series FX5S-30MT/ES
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: 1.003 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-F Series FX5S-40MT/ES
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: 1.003 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-F Series FX5S-60MT/ES
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: 1.003 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-F Series FX5S-80MT/ES
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: 1.003 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-F Series FX5S-30MR/ES
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: 1.003 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-F Series FX5S-40MR/ES
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: 1.003 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-F Series FX5S-60MR/ES
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: 1.003 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-F Series FX5S-80MR/ES
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: 1.003 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-F Series FX5S-30MT/ESS
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: 1.003 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-F Series FX5S-40MT/ESS
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: 1.003 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-F Series FX5S-60MT/ESS
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: 1.003 and prior
}
{
defaultStatus: unaffected
product: MELSEC iQ-F Series FX5S-80MT/ESS
vendor: Mitsubishi Electric Corporation
versions:
status: affected, version: 1.003 and prior
}
metrics:
cvssV3_1: [
attackComplexity: HIGH
attackVector: NETWORK
availabilityImpact: NONE
baseScore: 5.9
baseSeverity: MEDIUM
confidentialityImpact: NONE
integrityImpact: HIGH
privilegesRequired: NONE
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
version: 3.1
]
format: CVSS
scenarios: GENERAL