How severe is CVE-2020-26508?

CVE-2020-26508 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-26508 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-26508?

CVE-2020-26508 affects Canon Oce Colorwave 3500 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-26508?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2020-26508 published?

CVE-2020-26508 was published on 2020-11-16 and last updated on 2026-06-17.

CVE-2020-26508

CVE-2020-26508 is a critical-severity vulnerability in Canon Oce Colorwave 3500 Firmware with a CVSS 3.x base score of 9.8. 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-522.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 5.0
EPSS exploit prediction: 1% (62nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-522
Affected product: Canon Oce Colorwave 3500 Firmware
Published: 2020-11-16
Last modified: 2026-06-17

Description

The WebTools component on Canon Oce ColorWave 3500 5.1.1.0 devices allows attackers to retrieve stored SMB credentials via the export feature, even though these are intentionally inaccessible in the UI.

Frequently asked questions

What is CVE-2020-26508?: The WebTools component on Canon Oce ColorWave 3500 5.1.1.0 devices allows attackers to retrieve stored SMB credentials via the export feature, even though these are intentionally inaccessible in the UI.
How severe is CVE-2020-26508?: CVE-2020-26508 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-26508 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-26508?: CVE-2020-26508 affects Canon Oce Colorwave 3500 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-26508?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2020-26508 published?: CVE-2020-26508 was published on 2020-11-16 and last updated on 2026-06-17.

References

https://www.syss.de/pentest-blog/

Affected products (1)

cpe:2.3:o:canon:oce_colorwave_3500_firmware:5.1.1.0:*:*:*:*:*:*:*

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