CVE-2022-39843
CVE-2022-39843 is a high-severity vulnerability in Lotus 1-2-3 Project Lotus 1-2-3 with a CVSS 3.x base score of 7.8. 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-787.
Key facts
- Severity: High (CVSS 3.x base score 7.8)
- EPSS exploit prediction: 0% (36th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-787
- Affected product: Lotus 1-2-3 Project Lotus 1-2-3
- Published:
- Last modified:
Description
123elf Lotus 1-2-3 before 1.0.0rc3 for Linux, and Lotus 1-2-3 R3 for UNIX and other platforms through 9.8.2, allow attackers to execute arbitrary code via a crafted worksheet. This occurs because of a stack-based buffer overflow in the cell format processing routines, as demonstrated by a certain function call from process_fmt() that can be reached via a w3r_format element in a wk3 document.
Frequently asked questions
- What is CVE-2022-39843?
- 123elf Lotus 1-2-3 before 1.0.0rc3 for Linux, and Lotus 1-2-3 R3 for UNIX and other platforms through 9.8.2, allow attackers to execute arbitrary code via a crafted worksheet. This occurs because of a stack-based buffer overflow in the cell format processing routines, as demonstrated by a certain function call from process_fmt() that can be reached via a w3r_format element in a wk3 document.
- How severe is CVE-2022-39843?
- CVE-2022-39843 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2022-39843 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2022-39843?
- CVE-2022-39843 primarily affects Lotus 1-2-3 Project Lotus 1-2-3. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2022-39843?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2022-39843 published?
- CVE-2022-39843 was published on 2022-09-05 and last updated on 2026-06-17.
References
Affected products (2)
- cpe:2.3:a:lotus_1-2-3_project:lotus_1-2-3:1.0.0:rc1:*:*:*:*:*:*
- cpe:2.3:a:lotus_1-2-3_project:lotus_1-2-3:1.0.0:rc2:*:*:*:*:*:*
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