Evidence used
- No CISA KEV confirmation is currently recorded.
- The selected CVSS metric records a network-reachable, unauthenticated path with no user interaction.
- EPSS is 2.27% for the current model date.
BlackTreeCVE IntelligenceFull vulnerability report · 2020
CVE-2020-16226High confidence
Mitsubishi Electric Multiple Products
Mitsubishi Electric · QJ71MES96
9.8CriticalCVSS 3.1
Within 72 hours
Fix not verifiedCritical technical impact with a remotely reachable, unauthenticated path; no CISA KEV confirmation is currently recorded.
R
Open reassessment dashboard →Operational reassessment
Published severity in operational context
Published severityCritical→Operational priority:Critical, unchanged from published severity.unchanged
Compensating controls
- Restrict the affected network interface to trusted sources where business-safe.
- Monitor vendor guidance and exploitation sources for a material change.
Verification
- Confirm that the asset runs Mitsubishi Electric QJ71MES96 and falls inside the recorded affected range.
- Recheck the vendor advisory before scheduling a change because no verified fixed version is currently retained.
- Validate exposure, authentication requirements and compensating controls in the actual environment.
- Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Critical technical impact with a remotely reachable, unauthenticated path; no CISA KEV confirmation is currently recorded.
Fix not verified01
What, why and how
Multiple Mitsubishi Electric products are vulnerable to impersonations of a legitimate device by a malicious actor, which may allow an attacker to remotely execute arbitrary commands.
What
Multiple Mitsubishi Electric products are vulnerable to impersonations of a legitimate device by a malicious actor, which may allow an attacker to remotely execute arbitrary commands.
Why
An exact value or random number can be precisely predicted by observing previous values.
How
An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may execute code or commands in the affected security context.
What
Multiple Mitsubishi Electric products are vulnerable to impersonations of a legitimate device by a malicious actor, which may allow an attacker to remotely execute arbitrary commands.
Why
An exact value or random number can be precisely predicted by observing previous values.
How
An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may execute code or commands in the affected security context.
02
Exploit reality and attack path
CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.
Observed exploitation No confirmed evidence
?
Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.
Public PoC / exploit material None recorded
?
Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.
- Likely attack path
- a network path → Predictable Exact Value from Previous Values → execute code or commands in the affected security context
- Attack surface
- Network
- Privileges required
- None: unauthenticated exploitation is possible
- User interaction
- None
- Attack complexity
- Low: no specialised conditions are recorded
- Security boundary
- Unchanged: impact remains within the vulnerable component's security authority
- Weakness
?
CWE means Common Weakness Enumeration: a standard category for the underlying weakness. - CWE-342 ↗
CWE-342: Predictable Exact Value from Previous Values. An exact value or random number can be precisely predicted by observing previous values.
- CVSS vector
?
CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity. CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HCommon Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.
AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CHighConfidentiality impact: A successful attack can cause a major loss.IHighIntegrity impact: A successful attack can cause a major loss.AHighAvailability impact: A successful attack can cause a major loss.- Post-exploitation / living off the land
- After compromise, an attacker may use built-in shells, scripting engines, scheduled tasks and native network utilities for discovery, persistence or movement. This is a plausible LoTL path, not evidence that it has occurred for every attack.
03
Patch and workaround
Operational remediation based on structured source evidence.
- Status
?
Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change. - Fix not verified
- Affected
- QJ71MES96: all versions
- QJ71WS96: all versions
- Q06CCPU-V: all versions
- Q24DHCCPU-V: all versions
- Q24DHCCPU-VG: all versions
- R12CCPU-V: all versions
- RD55UP06-V,: all versions
- D55UP12-V: all versions
- RJ71GN11-T2: all versions
- RJ71EN71: all versions
- QJ71E71-100: all versions
- LJ71E71-100: all versions
- QJ71MT91: all versions
- RD78Gn(n=4,8,16,32,64): all versions
- RD78GHV: all versions
- RD78GHW: all versions
- NZ2GACP620-60: all versions
- NZ2GACP620-300: all versions
- NZ2FT-MT: all versions
- NZ2FT-EIP: all versions
- Q03UDECPU: the first 5 digits of serial number 22081 and prior
- QnUDEHCPU(n=04/06/10/13/20/26/50/100): the first 5 digits of serial number 22081 and prior
- QnUDVCPU(n=03/04/06/13/26): the first 5 digits of serial number 22031 and prior
- QnUDPVCPU(n=04/06/13/2): the first 5 digits of serial number 22031 and prior
- LnCPU(-P)(n=02/06/26): the first 5 digits of serial number 22051 and prior
- L26CPU-(P)BT: the first 5 digits of serial number 22051 and prior
- RnCPU(n=00/01/02): unspecified < Version 18 and prior
- RnCPU(n=04/08/16/32/120): unspecified < Version 50 and prior
- RnENCPU(n=04/08/16/32/120): unspecified < Version 50 and prior
- RnSFCPU (n=08/16/32/120): all versions
- RnPCPU(n=08/16/32/120): all versions
- RnPSFCPU(n=08/16/32/120): all versions
- FX5U(C)-**M*/**: unspecified < Serial number 17X**** or later: Version 1.210 and prior, unspecified < Serial number 179**** and prior: Version 1.070 and prior
- FX5UC-32M*/**-TS: unspecified < Version 1.210 and prior
- FX5UJ-**M*/**: Version 1.000
- FX5-ENET: all versions
- FX5-ENET/IP: all versions
- FX3U-ENET-ADP: all versions
- FX3GE-**M*/**: all versions
- FX3U-ENET: all versions
- FX3U-ENET-L: all versions
- FX3U-ENET-P502: all versions
- FX5-CCLGN-MS: all versions
- IU1-1M20-D: all versions
- LE7-40GU-L: all versions
- GOT2000 Series GT21 Model: all versions
- GS Series: all versions
- GOT1000 Series GT14 Model: all versions
- GT25-J71GN13-T2: all versions
- FR-A800-E Series: all versions
- FR-F800-E Series: all versions
- FR-A8NCG: Production date August 2020 and prior
- FR-E800-EPA Series: Production date July 2020 and prior
- FR-E800-EPB Series: Production date July 2020 and prior
- Conveyor Tracking Application: APR-nTR3FH all versions, APR-nTR6FH all versions, APR-nTR12FH all versions, APR-nTR20FH(n=1,2) all versions
- MR-JE-C: all versions
- MR-J4-TM: all versions
- Fixed
- No fixed version is explicitly recorded in the structured CVE data.
- Action
- No verified patch reference is present in the current structured sources. Check the vendor advisory before making a change.
- Workaround
- No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
04
Evidence and provenance
Published 5 Oct 2020 · Last source change 17 Sept 2024, 00:25 UTC · CWE-342 · Predictable Exact Value from Previous Values
CVE recordCVE.org · 5.1
CVSS sourceNIST NVD
EPSS source FIRST · tracked since 2026-08-14
?
The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.European sourceENISA EUVD · EUVD-2020-8192
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceCNA
NVD statusNVD modified after enrichment
Core structured fields are present and their contributing authorities are shown above.
Material change intelligence
View recent updates ↗What changed after publication
No material field changes have been recorded since change tracking began. Routine source refreshes and cosmetic edits are intentionally excluded.
Technical terms and abbreviations used in this report
- CVE
- Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
- CVSS
- Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
- EPSS
- Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
- CWE
- Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
- CNA
- CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
- CISA ADP
- Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
- NVD
- National Vulnerability Database: NIST's enrichment service for CVE records.
- CERT / CSIRT
- A computer security incident response team that publishes warnings or coordinates incident response.
- PoC
- Proof of concept: public material that demonstrates or helps reproduce exploitation.
- CSAF
- Common Security Advisory Framework: a machine-readable format for security advisories.
- LoTL
- Living off the land: abuse of legitimate tools or system functions during an attack.