CVE-2022-39843

Name: CVE-2022-39843
Creator: NVD / NIST
Published: 2022-09-05T07:15:08.207+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.45%

Last modified Jun 17, 2026

CVE-2022-39843 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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.. EPSS estimates a 0.45% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.8/10

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS Probability

0.45%

35.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions	Update
Lotus 1-2-3 Project	Lotus 1-2-3	1.0.0	Rc1

References

https://github.com/taviso/123elf/issues/103Exploit, Issue Tracking, Third Party Advisory
https://github.com/taviso/123elf/releases/tag/v1.0.0rc3Release Notes, Third Party Advisory
https://github.com/taviso/123elf/issues/103Exploit, Issue Tracking, Third Party Advisory
https://github.com/taviso/123elf/releases/tag/v1.0.0rc3Release Notes, Third Party Advisory

Timeline

Published: Sep 5, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-39843?

How severe is CVE-2022-39843?

CVE-2022-39843 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.45% probability of exploitation in the next 30 days.

How do I fix CVE-2022-39843?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-39843?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST