Skip to main content
No exploitation reportedFix available

CVE-2023-1424

No exploitation reported by the sources we read.

  • Published2023-05-24
  • WeaknessCWE-120

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') vulnerability in Mitsubishi Electric Corporation MELSEC iQ-F Series CPU modules and MELSEC iQ-R Series CPU modules allows a remote unauthenticated attacker to cause a denial of service (DoS) condition or execute malicious code on a target product by sending specially crafted packets. A system reset of the product is required for recovery from a denial of service (DoS) condition and malicious code execution.

Timeline

dates in UTC
  1. 2023-05-2405:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2023-1424?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2023-1424?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Mitsubishielectric melsec iq-fx5u-32mr\/ds firmwareversion to verify
BranchAffectedFixed in
—all versionsno fix published
Mitsubishielectric melsec iq-fx5u-32mr\/dss firmwareversion to verify
BranchAffectedFixed in
—all versionsno fix published
Mitsubishielectric melsec iq-fx5u-32mr\/es firmwareversion to verify
BranchAffectedFixed in
—all versionsno fix published

36 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

  • ICSA-23-143-03 CISA43 known affected

    Mitsubishi Electric MELSEC Series CPU module (Update D)

    Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-32MT/ES, Serial number 17X**** or later: >=1.220|<=1.281 · Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-32MT/DS, Serial number 17X**** or later: >=1.220|<=1.281 · Mitsubishi Electric Corporation MELSEC iQ-F Series FX5U-32MT/ESS, Serial number 17X**** or later: >=1.220|<=1.281 · +40 more

Full record on NVD

Fix

  1. Vendor fix CISA ICSA-23-143-03 · 27 productsMELSEC iQ-F Series: firmware version 1.290.
  2. Vendor fix CISA ICSA-23-143-03 · 1 productMELSEC iQ-R Series R00CPU: firmware version 36 or later.
  3. Vendor fix CISA ICSA-23-143-03 · 1 productMELSEC iQ-R Series R01CPU: firmware version 36 or later.
  4. Vendor fix CISA ICSA-23-143-03 · 1 productMELSEC iQ-R Series R02CPU: firmware version 36 or later.
  5. Vendor fix CISA ICSA-23-143-03 · 1 productMELSEC iQ-R Series R04(EN)CPU: firmware version 69 or later.
  6. Vendor fix CISA ICSA-23-143-03 · 1 productMELSEC iQ-R Series R08(EN)CPU: firmware version 69 or later.

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub

Sources

  • CISA-ADPSSVC decisionnone2025-03-05
  • OpenCVESSVC decisionnone—
  • CNACVSS 3.110read 2026-10-23
  • NVDCVSS 3.18.1read 2026-10-23
  • CNAweakness (CWE)CWE-120read 2026-10-23
  • NVDweakness (CWE)CWE-120read 2026-10-23
  • FIRST EPSSEPSS score3.4 %2026-10-22

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2023-05-24
Last Modified
2026-06-17
NVD status
Modified

Frequently asked questions

What is CVE-2023-1424?

Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') vulnerability in Mitsubishi Electric Corporation MELSEC iQ-F Series CPU modules and MELSEC iQ-R Series CPU modules allows a remote unauthenticated attacker to cause a denial of service (DoS) condition or execute malicious code on a target product by sending specially crafted packets. A system reset of the product is required for recovery from a denial of service (DoS) condition and malicious code execution.

Is CVE-2023-1424 actively exploited?

Active exploitation of CVE-2023-1424 has not been confirmed. Its EPSS score was 3.4% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2023-1424?

CVE-2023-1424 has a CVSS v3 base score of 8.1 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

Hear about the next vulnerability in your software

Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».

Get alerts for this productCISA KEV additions, October 2026Search CVEs

No credit card required · No monthly cap on website lookups · 250 API requests/month

Go further

Related vulnerabilities

Same product first, then the same vendor advisory and the same publication week.

Back to CVE Database