How severe is CVE-2025-66293?

CVE-2025-66293 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity none, and availability high.

Is CVE-2025-66293 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-66293?

CVE-2025-66293 affects Libpng. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-66293?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-66293 have an EU (EUVD) identifier?

Yes. CVE-2025-66293 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-201132.

When was CVE-2025-66293 published?

CVE-2025-66293 was published on 2025-12-03 and last updated on 2026-06-17.

CVE-2025-66293

CVE-2025-66293 is a high-severity vulnerability in Libpng with a CVSS 3.x base score of 7.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-125.

Key facts

Severity: High (CVSS 3.x base score 7.1)
EPSS exploit prediction: 0% (22nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-201132
Weakness: CWE-125
Affected product: Libpng
Published: 2025-12-03
Last modified: 2026-06-17

Description

LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. Prior to 1.6.52, an out-of-bounds read vulnerability in libpng's simplified API allows reading up to 1012 bytes beyond the png_sRGB_base[512] array when processing valid palette PNG images with partial transparency and gamma correction. The PNG files that trigger this vulnerability are valid per the PNG specification; the bug is in libpng's internal state management. Upgrade to libpng 1.6.52 or later.

Frequently asked questions

What is CVE-2025-66293?: LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. Prior to 1.6.52, an out-of-bounds read vulnerability in libpng's simplified API allows reading up to 1012 bytes beyond the png_sRGB_base[512] array when processing valid palette PNG images with partial transparency and gamma correction. The PNG files that trigger this vulnerability are valid per the PNG specification; the bug is in libpng's internal state management. Upgrade to libpng 1.6.52 or later.
How severe is CVE-2025-66293?: CVE-2025-66293 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity none, and availability high.
Is CVE-2025-66293 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-66293?: CVE-2025-66293 affects Libpng. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-66293?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-66293 have an EU (EUVD) identifier?: Yes. CVE-2025-66293 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-201132.
When was CVE-2025-66293 published?: CVE-2025-66293 was published on 2025-12-03 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:libpng:libpng:*:*:*:*:*:*:*:*

More vulnerabilities in Libpng

CVE-2017-12652 — Critical (CVSS 9.8): libpng before 1.6.32 does not properly check the length of chunks against the user limit.
CVE-2010-1205 — Critical (CVSS 9.8): Buffer overflow in pngpread.c in libpng before 1.2.44 and 1.4.x before 1.4.3, as used in progressive applications,…
CVE-2018-14550 — High (CVSS 8.8): An issue has been found in third-party PNM decoding associated with libpng 1.6.35. It is a stack-based buffer overflow…
CVE-2015-8540 — High (CVSS 8.8): Integer underflow in the png_check_keyword function in pngwutil.c in libpng 0.90 through 0.99, 1.0.x before 1.0.66,…
CVE-2015-0973 — High (CVSS 8.8): Buffer overflow in the png_read_IDAT_data function in pngrutil.c in libpng before 1.5.21 and 1.6.x before 1.6.16 allows…
CVE-2014-9495 — High (CVSS 8.8): Heap-based buffer overflow in the png_combine_row function in libpng before 1.5.21 and 1.6.x before 1.6.16, when…

All CVEs affecting Libpng →

Other CWE-125 (Out-of-bounds Read) vulnerabilities

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CVE-2017-14451 — Critical (CVSS 10.0): An exploitable out-of-bounds read vulnerability exists in libevm (Ethereum Virtual Machine) of CPP-Ethereum. A…
CVE-2013-0767 — Critical (CVSS 10.0): The nsSVGPathElement::GetPathLengthScale function in Mozilla Firefox before 18.0, Firefox ESR 10.x before 10.0.12 and…

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