CVE-2021-36081
Medium
Elevated severity or exploit probability.
CVSS base
7.8
HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS — probability of exploitation (30 days)
0.9%
57.7th percentile
CISA KEV
Not listed
Weakness / dates
CWE-416
Published 2021-07-01 · modified 2026-09-14
CVSS breakdown
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
| Attack Vector | L | Local |
| Attack Complexity | L | Low |
| Privileges Required | N | None |
| User Interaction | R | Required |
| Scope | U | Unchanged |
| Confidentiality | H | High |
| Integrity | H | High |
| Availability | H | High |
Timeline
- 2021-07-01 — Published (NVD)
- 2026-09-14 — Last modified (NVD)
Description
Tesseract OCR 5.0.0-alpha-20201231 has a one_ell_conflict use-after-free during a strpbrk call.
Affected
References
- exploit https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=29698
- https://github.com/google/oss-fuzz-vulns/blob/main/vulns/tesseract-ocr/OSV-2021-211.yaml
- https://github.com/tesseract-ocr/tesseract/commit/e6f15621c2ab2ecbfabf656942d8ef66f03b2d55
- exploit https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=29698
- https://github.com/google/oss-fuzz-vulns/blob/main/vulns/tesseract-ocr/OSV-2021-211.yaml
- https://github.com/tesseract-ocr/tesseract/commit/e6f15621c2ab2ecbfabf656942d8ef66f03b2d55