7.8High

Tesseract-Ocr Tesseract Ocr

CVE-2021-36081

Tesseract OCR 5.0.0-alpha-20201231 has a one_ell_conflict use-after-free during a strpbrk call.

What this means for your business

  • It affects Tesseract-Ocr Tesseract Ocr. It matters if your company, or a supplier that handles your data, runs it.
  • Code showing how to exploit it has been published, but real attacks have not been confirmed.
  • An attacker can use it only with access to the machine itself, without a login, but only after tricking someone into an action such as opening a file or a link.
  • FIRST's prediction model gives it a 0.9% chance of attack attempts being seen in the next 30 days, ranking above 57% of all known flaws.

What to do

  1. 1Check whether your company or your suppliers run Tesseract-Ocr Tesseract Ocr, and which version. The affected versions are listed further down this page.
  2. 2If you do, apply the vendor's fix. A patch or vendor advisory has been published.

Not sure if your company is exposed?

Fastnexa’s certified penetration testers can check whether attackers could use this flaw, or others like it, against your websites, apps and network. The full test is free for our first 10 founding clients until 31 December 2026.

Scoring

CVSS
7.8 (v3.1)
Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness
CWE-416
Assigned by
cve@mitre.org

Dates

Published
2021-07-01
Last modified
2026-09-14
Sources
NVD

Affected products

  • Tesseract-Ocr Tesseract Ocr5.0.0
  • Linux Linux Kernelall versions

As listed in the NVD configuration data. Not a statement about your estate.

References