CVE-2026-12912: Libtiff: libtiff: heap-based buffer overflow via crafted pixarlog-compressed tiff image

highCVSS 7.3CVE-2026-12912

CSIRTS triage

vendor: Libtiff product: libtiff Memory corruption

What: There is a heap-based buffer overflow vulnerability via crafted pixarlog-compressed tiff images.
Who is affected: Deployments of libtiff that process pixarlog-compressed tiff images are affected.
Urgency: Remediation is urgent due to the high severity and potential for exploitation.
Action: Update to the latest version of libtiff to mitigate this vulnerability.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: high — CVSS 7.3
Published: 2026-06-09
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-12912

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-129120.23% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 14% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-12912	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for Libtiff

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

medium[UPDATE] [medium] libTIFF: Vulnerability allows code execution and Denial of Servicecert-bund · 2026-07-29
medium[UPDATE] [medium] libTIFF: Vulnerability allows Denial of Servicecert-bund · 2026-07-28
medium[UPDATE] [medium] libTIFF: Multiple Vulnerabilities Allow Denial of Servicecert-bund · 2026-07-23
medium[UPDATE] [medium] libTIFF: Multiple Vulnerabilities Allow Denial of Servicecert-bund · 2026-07-23
medium[UPDATE] [medium] libTIFF: Vulnerability allows code execution and DoScert-bund · 2026-07-17
medium[UPDATE] [medium] libTIFF: Vulnerability allows denial of servicecert-bund · 2026-07-02