How severe is CVE-2021-20877?

CVE-2021-20877 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-20877 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-20877?

CVE-2021-20877 primarily affects Canon 2204f. In total, 34 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-20877?

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

When was CVE-2021-20877 published?

CVE-2021-20877 was published on 2022-02-08 and last updated on 2026-06-17.

CVE-2021-20877

CVE-2021-20877 is a medium-severity vulnerability in Canon 2204f with a CVSS 3.x base score of 4.8. 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 4.8)
CVSS v2: 3.5
EPSS exploit prediction: 1% (57th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Canon 2204f
Published: 2022-02-08
Last modified: 2026-06-17

Description

Cross-site scripting vulnerability in Canon laser printers and small office multifunctional printers (LBP162L/LBP162, MF4890dw, MF269dw/MF265dw/MF264dw/MF262dw, MF249dw/MF245dw/MF244dw/MF242dw/MF232w, and MF229dw/MF224dw/MF222dw sold in Japan, imageCLASS MF Series (MF113W/MF212W/MF217W/MF227DW/MF229DW, MF232W/MF244DW/MF247DW/MF249DW, MF264DW/MF267DW/MF269DW/MF269DW VP, and MF4570DN/MF4570DW/MF4770N/MF4880DW/MF4890DW) and imageCLASS LBP Series (LBP113W/LBP151DW/LBP162DW ) sold in the US, and iSENSYS (LBP162DW, LBP113W, LBP151DW, MF269dw, MF267dw, MF264dw, MF113w, MF249dw, MF247dw, MF244dw, MF237w, MF232w, MF229dw, MF217w, MF212w, MF4780w, and MF4890dw) and imageRUNNER (2206IF, 2204N, and 2204F) sold in Europe) allows remote attackers to inject an arbitrary script via unspecified vectors.

Frequently asked questions

What is CVE-2021-20877?: Cross-site scripting vulnerability in Canon laser printers and small office multifunctional printers (LBP162L/LBP162, MF4890dw, MF269dw/MF265dw/MF264dw/MF262dw, MF249dw/MF245dw/MF244dw/MF242dw/MF232w, and MF229dw/MF224dw/MF222dw sold in Japan, imageCLASS MF Series (MF113W/MF212W/MF217W/MF227DW/MF229DW, MF232W/MF244DW/MF247DW/MF249DW, MF264DW/MF267DW/MF269DW/MF269DW VP, and MF4570DN/MF4570DW/MF4770N/MF4880DW/MF4890DW) and imageCLASS LBP Series (LBP113W/LBP151DW/LBP162DW ) sold in the US, and iSENSYS (LBP162DW, LBP113W, LBP151DW, MF269dw, MF267dw, MF264dw, MF113w, MF249dw, MF247dw, MF244dw, MF237w, MF232w, MF229dw, MF217w, MF212w, MF4780w, and MF4890dw) and imageRUNNER (2206IF, 2204N, and 2204F) sold in Europe) allows remote attackers to inject an arbitrary script via unspecified vectors.
How severe is CVE-2021-20877?: CVE-2021-20877 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-20877 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-20877?: CVE-2021-20877 primarily affects Canon 2204f. In total, 34 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-20877?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-20877 published?: CVE-2021-20877 was published on 2022-02-08 and last updated on 2026-06-17.

References

Affected products (34)

cpe:2.3:h:canon:2204f:-:*:*:*:*:*:*:*
cpe:2.3:h:canon:2204n:-:*:*:*:*:*:*:*
cpe:2.3:h:canon:2206if:-:*:*:*:*:*:*:*
cpe:2.3:h:canon:lbp113w:-:*:*:*:*:*:*:*
cpe:2.3:h:canon:lbp151dw:-:*:*:*:*:*:*:*
cpe:2.3:h:canon:lbp162:-:*:*:*:*:*:*:*
cpe:2.3:h:canon:lbp162dw:-:*:*:*:*:*:*:*
cpe:2.3:h:canon:lbp162l:-:*:*:*:*:*:*:*
cpe:2.3:h:canon:mf113w:-:*:*:*:*:*:*:*
cpe:2.3:h:canon:mf212w:-:*:*:*:*:*:*:*
cpe:2.3:h:canon:mf217w:-:*:*:*:*:*:*:*
cpe:2.3:h:canon:mf222dw:-:*:*:*:*:*:*:*
cpe:2.3:h:canon:mf224dw:-:*:*:*:*:*:*:*
cpe:2.3:h:canon:mf227dw:-:*:*:*:*:*:*:*
cpe:2.3:h:canon:mf229dw:-:*:*:*:*:*:*:*
cpe:2.3:h:canon:mf232w:-:*:*:*:*:*:*:*
cpe:2.3:h:canon:mf237w:-:*:*:*:*:*:*:*
cpe:2.3:h:canon:mf242dw:-:*:*:*:*:*:*:*
cpe:2.3:h:canon:mf244dw:-:*:*:*:*:*:*:*
cpe:2.3:h:canon:mf245dw:-:*:*:*:*:*:*:*
cpe:2.3:h:canon:mf247dw:-:*:*:*:*:*:*:*
cpe:2.3:h:canon:mf249dw:-:*:*:*:*:*:*:*
cpe:2.3:h:canon:mf262dw:-:*:*:*:*:*:*:*
cpe:2.3:h:canon:mf264dw:-:*:*:*:*:*:*:*
cpe:2.3:h:canon:mf265dw:-:*:*:*:*:*:*:*
cpe:2.3:h:canon:mf267dw:-:*:*:*:*:*:*:*
cpe:2.3:h:canon:mf269dw:-:*:*:*:*:*:*:*
cpe:2.3:h:canon:mf269dw_vp:-:*:*:*:*:*:*:*
cpe:2.3:h:canon:mf4570dn:-:*:*:*:*:*:*:*
cpe:2.3:h:canon:mf4570dw:-:*:*:*:*:*:*:*
cpe:2.3:h:canon:mf4770n:-:*:*:*:*:*:*:*
cpe:2.3:h:canon:mf4780w:-:*:*:*:*:*:*:*
cpe:2.3:h:canon:mf4880dw:-:*:*:*:*:*:*:*
cpe:2.3:h:canon:mf4890dw:-:*:*:*:*:*:*:*

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