PatchTheCVECVE-2021-38154: Certain Canon devices manufactured in 2012 through 2020 (such as imageRUNNER ADVANCE iR-ADV C5250), when Catwa
CVE-2021-38154 is a high-severity flaw (CVSS 7.5) affecting -. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Certain Canon devices manufactured in 2012 through 2020 (such as imageRUNNER ADVANCE iR-ADV C5250), when Catwalk Server is enabled for HTTP access, allow remote attackers to modify an e-mail address setting, and thus cause the device to send sensitive information through e-mail to the attacker. For example, an incoming FAX may be sent through e-mail to the attacker. This occurs when a PIN is not required for General User Mode, as exploited in the
Why this priority
- High severity
- EPSS top 9%: very likely to be exploited
- Public exploit reference
- Remotely exploitable, no login, no user action
No fix is published yet: follow the downgrade or mitigation steps.
Risk facts
| CVSS score | 7.5 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 4.0% (top 9%) |
| CISA exploited list | No |
| Weakness | CWE-732 |
| Published | 2021-08-29 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Public exploits and detection
Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.
- Nuclei scan template: Canon Devices - Authentication Bypass in Catwalk Server
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2021-38154?
-: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.
Is CVE-2021-38154 being exploited?
CVE-2021-38154 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2021-38154 affect?
CVE-2021-38154 affects -. Severity is high (CVSS 7.5). Certain Canon devices manufactured in 2012 through 2020 (such as imageRUNNER ADVANCE iR-ADV C5250), when Catwalk Server is enabled for HTTP access, allow remote attackers to modify an e-mail address setting, and thus cause the device to sen
How urgent is CVE-2021-38154?
Priority 59/100. High severity; EPSS top 9%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action
Software pages
Canon printers vulnerabilities
Related CVEs
- CVE-2021-24087 HIGH 7.0 UPGRADE Azure IoT CLI extension Elevation of Privilege Vulnerability
- CVE-2020-3681 CRITICAL 9.8 MITIGATE Authenticated and encrypted payload MMEs can be forged and remotely sent to any HPAV2 system using a jailbreak
- CVE-2019-0162 LOW 3.8 MITIGATE Memory access in virtual memory mapping for some microprocessors may allow an authenticated user to potentiall
- CVE-2017-13097 HIGH 7.8 MITIGATE The P1735 IEEE standard describes flawed methods for encrypting electronic-design intellectual property (IP),
- CVE-2017-13096 HIGH 7.8 MITIGATE The P1735 IEEE standard describes flawed methods for encrypting electronic-design intellectual property (IP),