How severe is CVE-2021-22749?

CVE-2021-22749 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2021-22749 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-22749?

CVE-2021-22749 primarily affects Schneider-electric Modicon X80 Bmxnor0200h Rtu Firmware. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-22749?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-22749 published?

CVE-2021-22749 was published on 2021-06-11 and last updated on 2026-06-17.

CVE-2021-22749

CVE-2021-22749 is a medium-severity vulnerability in Schneider-electric Modicon X80 Bmxnor0200h Rtu Firmware with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-200.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 5.0
EPSS exploit prediction: 1% (56th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Schneider-electric Modicon X80 Bmxnor0200h Rtu Firmware
Published: 2021-06-11
Last modified: 2026-06-17

Description

A CWE-200: Exposure of Sensitive Information to an Unauthorized Actor vulnerability exists in Modicon X80 BMXNOR0200H RTU SV1.70 IR22 and prior that could cause information leak concerning the current RTU configuration including communication parameters dedicated to telemetry, when a specially crafted HTTP request is sent to the web server of the module.

Frequently asked questions

What is CVE-2021-22749?: A CWE-200: Exposure of Sensitive Information to an Unauthorized Actor vulnerability exists in Modicon X80 BMXNOR0200H RTU SV1.70 IR22 and prior that could cause information leak concerning the current RTU configuration including communication parameters dedicated to telemetry, when a specially crafted HTTP request is sent to the web server of the module.
How severe is CVE-2021-22749?: CVE-2021-22749 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2021-22749 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-22749?: CVE-2021-22749 primarily affects Schneider-electric Modicon X80 Bmxnor0200h Rtu Firmware. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-22749?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-22749 published?: CVE-2021-22749 was published on 2021-06-11 and last updated on 2026-06-17.

References

http://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2021-159-05

Affected products (7)

cpe:2.3:o:schneider-electric:modicon_x80_bmxnor0200h_rtu_firmware:sv1.6:ir4:*:*:*:*:*:*
cpe:2.3:o:schneider-electric:modicon_x80_bmxnor0200h_rtu_firmware:sv1.7:ir10:*:*:*:*:*:*
cpe:2.3:o:schneider-electric:modicon_x80_bmxnor0200h_rtu_firmware:sv1.7:ir15b:*:*:*:*:*:*
cpe:2.3:o:schneider-electric:modicon_x80_bmxnor0200h_rtu_firmware:sv1.7:ir17:*:*:*:*:*:*
cpe:2.3:o:schneider-electric:modicon_x80_bmxnor0200h_rtu_firmware:sv1.7:ir18:*:*:*:*:*:*
cpe:2.3:o:schneider-electric:modicon_x80_bmxnor0200h_rtu_firmware:sv1.7:ir19:*:*:*:*:*:*
cpe:2.3:o:schneider-electric:modicon_x80_bmxnor0200h_rtu_firmware:sv1.7:ir20:*:*:*:*:*:*

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