Service interruption via out-of-bounds project parsing
Published Sep 2, 2021 · Updated May 29, 2026
Out-of-bounds read in Schneider Electric Modicon controllers and PLC simulators allows remote authenticated users to interrupt service. Schneider Electric has not identified the affected parser or disclosed how crafted project data triggers the out-of-bounds read. The attacker must have network access and privileges to download the project; successful processing causes loss of availability, though the vendor does not identify whether the target hangs, crashes, or reboots.
Summary
What happened
Out-of-bounds read in Schneider Electric Modicon controllers and PLC simulators allows remote authenticated users to interrupt service. Schneider Electric has not identified the affected parser or disclosed how crafted project data triggers the out-of-bounds read. The attacker must have network access and privileges to download the project; successful processing causes loss of availability, though the vendor does not identify whether the target hangs, crashes, or reboots.
The record
- CVE
- CVE-2021-22790
- Published
- Sep 2, 2021
- Updated
- May 29, 2026
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-125, T0826
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Sep 2, 2021CVE publishedPublication date reported by the CVE source.
- May 29, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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What is affected?
Affected products and versions are unavailable in this record.
Published CVSS scores
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Attacks
What attackers are doing with it
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Public exploit references
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Technologies
Your stack
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Your stack
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