What is CVE-2020-35523?

CVE-2020-35523 is a high-severity vulnerability in Libtiff, classified under Integer Overflow or Wraparound. CVSS score: 7.8/10. Published 2021-03-09.

How severe is CVE-2020-35523?

High severity. CVSS v3 base score is 7.8 out of 10.

Is CVE-2020-35523 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Integer overflow in Libtiff

CVE-2020-35523

An integer overflow flaw was found in libtiff that exists in the tif_getimage.c file. This flaw allows an attacker to inject and execute arbitrary code when a user opens a crafted TIFF file. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

Vulnerability class: Integer Overflow

Published 2021-03-09 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.019 (79.1th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 79th percentile — 79.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.019 · newest: 0.019 · change: 0.000

Affected products

Libtiff
NetApp Ontap Select Deploy Administration Utility
Debian Linux — versions 9.0, 10.0
Red Hat Enterprise Linux — versions 6.0, 7.0, 8.0
Libtiff — versions libtiff 4.2.0

Weakness classification (CWE)

CWE-190 — Integer Overflow or Wraparound

Public proof-of-concept exploits

ARPSyndicate/cvemon

References

gitlab.com/libtiff/libtiff/-/commit/c8d613ef497058fe653c467fc84c70a62a4a71b2 (Patch, Third Party Advisory)
gitlab.com/libtiff/libtiff/-/merge_requests/160 (Patch, Third Party Advisory)
bugzilla.redhat.com/show_bug.cgi (Patch, Third Party Advisory, Issue Tracking)
www.debian.org/security/2021/dsa-4869 (vendor-advisory, Third Party Advisory)
lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
security.gentoo.org/glsa/202104-06 (vendor-advisory, Third Party Advisory)
security.netapp.com/advisory/ntap-20210521-0009/ (Third Party Advisory)
lists.debian.org/debian-lts-announce/2021/06/msg00023.html (mailing-list, Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2020-35523?: CVE-2020-35523 is a high-severity vulnerability in Libtiff, classified under Integer Overflow or Wraparound. CVSS score: 7.8/10. Published 2021-03-09.
How severe is CVE-2020-35523?: High severity. CVSS v3 base score is 7.8 out of 10.
Is CVE-2020-35523 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.