CVE-2021-3888

Name: CVE-2021-3888
Creator: NVD / NIST
Published: 2021-10-19T13:15:11.927+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.1/10EPSS 1.20%

Last modified Jun 17, 2026

CVE-2021-3888 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. libmobi is vulnerable to Use of Out-of-range Pointer Offset. EPSS estimates a 1.20% chance of exploitation in the next 30 days.

Description

libmobi is vulnerable to Use of Out-of-range Pointer Offset

Metrics

CVSS 3.1

8.1/10

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

EPSS Probability

1.20%

64.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Libmobi Project	Libmobi	< 0.8

References

https://github.com/bfabiszewski/libmobi/commit/c78e186739b50d156cb3da5d08d70294f0490853Patch, Third Party Advisory
https://huntr.dev/bounties/722b3acb-792b-4429-a98d-bb80efb8938dExploit, Patch, Third Party Advisory
https://github.com/bfabiszewski/libmobi/commit/c78e186739b50d156cb3da5d08d70294f0490853Patch, Third Party Advisory
https://huntr.dev/bounties/722b3acb-792b-4429-a98d-bb80efb8938dExploit, Patch, Third Party Advisory

Timeline

Published: Oct 19, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-3888?

libmobi is vulnerable to Use of Out-of-range Pointer Offset

How severe is CVE-2021-3888?

CVE-2021-3888 has a CVSS score of 8.1/10 (HIGH severity). The EPSS model estimates a 1.20% probability of exploitation in the next 30 days.

How do I fix CVE-2021-3888?

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-2021-3888?

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

Scan your code now

Source: NVD / NIST