CVE-2021-44734
CVE-2021-44734 is a critical-severity vulnerability in Lexmark B2236 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-94.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- CVSS v2: 10.0
- EPSS exploit prediction: 6% (93rd percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-94
- Affected product: Lexmark B2236 Firmware
- Published:
- Last modified:
Description
Embedded web server input sanitization vulnerability in Lexmark devices through 2021-12-07, which can which can lead to remote code execution on the device.
Frequently asked questions
- What is CVE-2021-44734?
- Embedded web server input sanitization vulnerability in Lexmark devices through 2021-12-07, which can which can lead to remote code execution on the device.
- How severe is CVE-2021-44734?
- CVE-2021-44734 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-2021-44734 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-44734?
- CVE-2021-44734 primarily affects Lexmark B2236 Firmware. In total, 234 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2021-44734?
- 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-2021-44734 published?
- CVE-2021-44734 was published on 2022-01-20 and last updated on 2026-06-17.
References
Affected products (234)
- cpe:2.3:o:lexmark:b2236_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:lexmark:mb2236_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:lexmark:ms431_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:lexmark:ms331_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:lexmark:m1342_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:lexmark:b3442_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:lexmark:b3340_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:lexmark:xm1342_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:lexmark:mx331_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:lexmark:mx431_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:lexmark:mb3442_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:lexmark:ms321_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:lexmark:ms421_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:lexmark:ms521_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:lexmark:ms621_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:lexmark:m1242_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:lexmark:m1246_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:lexmark:b2338_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:lexmark:b2442_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:lexmark:b2546_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:lexmark:b2650_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:lexmark:ms622_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:lexmark:m3250_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:lexmark:mx321_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:lexmark:mb2338_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:lexmark:mx421_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:lexmark:mx521_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:lexmark:mx522_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:lexmark:mx622_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:lexmark:xm1242_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:lexmark:xm1246_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:lexmark:xm3250_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:lexmark:mb2442_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:lexmark:mb2546_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:lexmark:mb2650_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:lexmark:ms821_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:lexmark:ms823_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:lexmark:ms825_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:lexmark:b2865_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:lexmark:ms725_firmware:*:*:*:*:*:*:*:*
More vulnerabilities in Lexmark B2236 Firmware
- CVE-2023-23560 — Critical (CVSS 9.8): In certain Lexmark products through 2023-01-12, SSRF can occur because of a lack of input validation.
- CVE-2021-44735 — Critical (CVSS 9.8): Embedded web server command injection vulnerability in Lexmark devices through 2021-12-07.
- CVE-2021-44738 — Critical (CVSS 9.8): Buffer overflow vulnerability has been identified in Lexmark devices through 2021-12-07 in postscript interpreter.
- CVE-2021-44737 — High (CVSS 8.8): PJL directory traversal vulnerability in Lexmark devices through 2021-12-07 that can be leveraged to overwrite internal…
- CVE-2022-29850 — High (CVSS 8.1): Various Lexmark products through 2022-04-27 allow an attacker who has already compromised an affected Lexmark device to…
- CVE-2023-22960 — High (CVSS 7.5): Lexmark products through 2023-01-10 have Improper Control of Interaction Frequency.
All CVEs affecting Lexmark B2236 Firmware →
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