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libtiff EUVDEUVD-2026-66177

| CVE-2026-52491 HIGH
Integer Overflow or Wraparound (CWE-190)
2026-08-25 cve@mitre.org GHSA-28v3-93mm-ccfv
RCE Integer Overflow
8.4
CVSS 3.1 · Vendor: mitre
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Severity by source

Vendor (mitre) PRIMARY
8.4 HIGH
AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
vuln.today AI
8.4 HIGH

Local vector confirmed by tool-based exploitation; PR:N as any local user can invoke the thumbnail utility; UI:N justified for automated pipeline scenarios processing untrusted TIFF files; full C/I/A from arbitrary code execution.

3.1 AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
4.0 AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
SUSE
6.4 MEDIUM
AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:H
Red Hat
7.3 HIGH
qualitative

Primary rating from Vendor (mitre).

CVSS VectorVendor: mitre

Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

4
Analysis Generated
Aug 31, 2026 - 18:32 vuln.today
CVSS changed
Aug 31, 2026 - 16:22 NVD
8.4 (HIGH)
CVE Published
Aug 25, 2026 - 21:17 cve.org
HIGH 8.4
CVE Published
Aug 25, 2026 - 21:17 cve.org
UNKNOWN (no severity yet)

DescriptionCVE.org

An issue in libtiff 85f2ac8e0b01cb7db2bbecf4a3b891bdbef67938 allows an attacker to execute arbitrary code via the libtiff/tools/thumbnail.c: main() component

AnalysisAI

Arbitrary code execution in libtiff's thumbnail command-line tool (commit 85f2ac8e0b01cb7db2bbecf4a3b891bdbef67938) allows local attackers to achieve full system compromise through a CWE-190 integer overflow in the main() function of libtiff/tools/thumbnail.c. When a crafted TIFF file triggers the wraparound, memory corruption can enable attacker-controlled code execution with the privileges of the invoking process. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

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Delivery
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Exploit
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Vulnerability AssessmentAI

Exploitation Exploitation requires that the libtiff thumbnail command-line tool (libtiff/tools/thumbnail.c) be invoked against an attacker-supplied or attacker-controlled TIFF file. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS base score of 8.4 (High) with vector AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H reflects high technical impact but is constrained to a local attack vector, limiting network-reachable exposure compared to a network-vector vulnerability. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Upstream fix available via GitLab commit 9ce4d089bcf25496663776d9e6336738112f09a3 in the libtiff repository (https://gitlab.com/libtiff/libtiff/-/commit/9ce4d089bcf25496663776d9e6336738112f09a3); apply this commit or await a tagged release confirmed to incorporate it, then update all downstream packages. … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours, identify and inventory all systems running libtiff's thumbnail tool, particularly development and testing environments where external TIFF files may be processed; restrict local user access to this utility where operationally feasible. …

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Same weakness CWE-190 – Integer Overflow or Wraparound

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Vendor StatusVendor

SUSE

Severity: Moderate
Product Status
SUSE Linux Enterprise Desktop 15 SP7 Not-Affected
SUSE Linux Enterprise Desktop 15 SP7 Not-Affected
SUSE Linux Enterprise Desktop 15 SP7 Affected
SUSE Linux Enterprise High Performance Computing 12 Affected
SUSE Linux Enterprise Micro 5.3 Affected

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EUVD-2026-66177 vulnerability details – vuln.today
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