CVE-2025-66293

HIGHPre-NVD 7.17.1
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

This high-severity CVE scores 7.1 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4% (27th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
Elevated
7.1EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 7.1Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

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.

CVSS v3
7.1
EG Score
7.1HIGHmedium confidence
EG Risk
48
EG Risk 48/100

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed (value × EchelonGraph’s weight)
Severity71% × 45%
The EG Score, 7.1 of 10.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.4%
EPSS %ILE
27th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

December 3, 2025

Last Modified

June 17, 2026

Advisory Details (7)

Auto-updated Aug 8, 2026
Patch available. Sources: github_commit, github.
Web pageMentions a patch (unverified)

[Security Report] Out-of-bounds Read in libpng 1.6.51 · Issue #764 · pnggroup/libpng · GitHub

https://github.com/pnggroup/libpng/issues/764
Web page

oss-security - Re: libpng 1.6.52: Out-of-bounds vulnerability fixed: CVE-2025-66293

http://www.openwall.com/lists/oss-security/2025/12/03/8
Web page

oss-security - Re: libpng 1.6.52: Out-of-bounds vulnerability fixed: CVE-2025-66293

http://www.openwall.com/lists/oss-security/2025/12/03/7
Web page

oss-security - Re: libpng 1.6.52: Out-of-bounds vulnerability fixed: CVE-2025-66293

http://www.openwall.com/lists/oss-security/2025/12/03/6
GitHub advisoryMentions a patch (unverified)

Out-of-bounds read in `png_image_read_composite` · Advisory · pnggroup/libpng · GitHub

https://github.com/pnggroup/libpng/security/advisories/GHSA-9mpm-9pxh-mg4f
GitHub commit

commit a05a48b756de (pnggroup/libpng)

Fix landed in pnggroup/libpng commit a05a48b756de — awaiting tagged release

https://github.com/pnggroup/libpng/commit/a05a48b756de63e3234ea6b3b938b8f5f862484a
GitHub commit

commit 788a624d7387 (pnggroup/libpng)

Fix landed in pnggroup/libpng commit 788a624d7387 — awaiting tagged release

https://github.com/pnggroup/libpng/commit/788a624d7387a758ffd5c7ab010f1870dea753a1

Vendor Advisories for CVE-2025-66293(20)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(28)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntulibpng16-tools (1.6.20-2ubuntu0.1~esm3) @ xenial2026-05-29ubuntu
ubuntulibpng16-16t64 (1.6.50-1ubuntu0.3) @ questing2026-05-29ubuntu
redhatjava-17-openjdk-1:17.0.19.0.10-1.el92026-04-24redhat
redhatjava-11-openjdk-portable2026-04-22redhat
redhatjava-11-openjdk-1:11.0.31.0.11-1.el92026-04-22redhat
redhatlibpng-main-1.6.56-1.hum12026-04-07redhat
redhatrhcos-415.92.202603101737-02026-03-19redhat
redhatrhcos-412.86.202603041314-02026-03-12redhat
redhatrhcos-413.92.202602240113-02026-03-05redhat
redhatrhcos-414.92.202602171627-02026-02-26redhat
redhatrhcos-417.94.202602090846-02026-02-18redhat
redhatrhcos-416.94.202602101357-02026-02-18redhat
redhatrhcos-4.19.9.6.202602112047-02026-02-18redhat
redhatrhcos-418.94.202602022246-02026-02-11redhat
redhatlibpng-2:1.6.34-8.el8_2.12026-01-08redhat
redhatlibpng-2:1.6.34-8.el8_4.12026-01-08redhat
redhatlibpng-2:1.6.34-8.el8_6.12026-01-08redhat
redhatdiscovery/discovery-ui-rhel9:17679045732026-01-08redhat
redhatlibpng-2:1.6.34-8.el8_8.12026-01-08redhat
redhatlibpng-2:1.6.34-9.el8_102026-01-07redhat
redhatlibpng-2:1.6.37-12.el9_0.12026-01-07redhat
redhatlibpng-2:1.6.37-12.el9_7.12026-01-07redhat
redhatlibpng-2:1.6.37-12.el9_6.12026-01-07redhat
redhatlibpng-2:1.6.40-8.el10_1.12026-01-07redhat
redhatlibpng-2:1.6.40-8.el10_0.12026-01-07redhat
redhatlibpng-2:1.6.37-12.el9_4.12026-01-07redhat
redhatlibpng-2:1.6.37-12.el9_2.12026-01-07redhat
redhatmingw-libpng-0:1.6.34-1.el8_102026-01-06redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(9 across 9 ecosystems)
Alpine:v3.20(1)
PackageVulnerable rangeFix by version rangeDependents
libpng—
  • every version up to 1.6.53-r0: fixed in 1.6.53-r0
—
Alpine:v3.21(1)
PackageVulnerable rangeFix by version rangeDependents
libpng—
  • every version up to 1.6.53-r0: fixed in 1.6.53-r0
—
Alpine:v3.22(1)
PackageVulnerable rangeFix by version rangeDependents
libpng—
  • every version up to 1.6.53-r0: fixed in 1.6.53-r0
—
Alpine:v3.23(1)
PackageVulnerable rangeFix by version rangeDependents
libpng—
  • every version up to 1.6.53-r0: fixed in 1.6.53-r0
—
Alpine:v3.24(1)
PackageVulnerable rangeFix by version rangeDependents
libpng—
  • every version up to 1.6.53-r0: fixed in 1.6.53-r0
—
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
libpng1.61.6.37-3
  • every version up to 1.6.37-3+deb11u1: fixed in 1.6.37-3+deb11u1
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
libpng1.61.6.39-2
  • every version up to 1.6.39-2+deb12u1: fixed in 1.6.39-2+deb12u1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
libpng1.61.6.48-1
  • every version up to 1.6.48-1+deb13u1: fixed in 1.6.48-1+deb13u1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
libpng1.61.6.48-1, 1.6.49-1~exp1, 1.6.50-1, 1.6.50-1~exp1, 1.6.51-1
  • every version up to 1.6.52-1: fixed in 1.6.52-1
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(6)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 11× in last 7d / 30× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 91 of 172 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 9 repeat rows among the latest 100 are merged into the row they repeat. The 81 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  2. 2026-10-14 16:31 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  3. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  4. 2026-10-12 16:48 UTCEG score recompute
  5. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  6. 2026-10-11 20:23 UTCEG score recompute
  7. 2026-10-11 18:35 UTCEG score recompute
  8. 2026-10-11 15:10 UTCEG score recompute
  9. 2026-10-11 13:47 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  10. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  11. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  12. 2026-10-08 17:10 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  13. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  14. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  15. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  16. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  17. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  18. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  19. 2026-10-01 06:40 UTCOSV refresh
  20. 2026-09-30 15:02 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  21. 2026-09-29 15:20 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  22. 2026-09-28 13:50 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  23. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  24. 2026-09-24 14:02 UTCEPSS rescoreEPSS 0.4% · 26th percentile
  25. 2026-09-23 13:47 UTCEPSS rescoreEPSS 0.4% · 29th percentile
Show 66 more
  1. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  2. 2026-09-19 15:42 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  3. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  4. 2026-09-17 19:30 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  5. 2026-09-16 14:07 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  6. 2026-09-15 03:10 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  7. 2026-09-13 16:46 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  8. 2026-09-12 15:00 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  9. 2026-09-12 07:53 UTCOSV refresh
  10. 2026-09-11 14:52 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  11. 2026-09-11 09:36 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  12. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  13. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  14. 2026-09-07 16:00 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  15. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  16. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  17. 2026-09-02 14:11 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  18. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  19. 2026-08-30 19:16 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  20. 2026-08-30 01:21 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  21. 2026-08-28 21:40 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  22. 2026-08-27 14:24 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  23. 2026-08-26 14:45 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  24. 2026-08-25 13:48 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  25. 2026-08-24 14:16 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  26. 2026-08-24 13:02 UTCOSV refresh
  27. 2026-08-23 00:18 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  28. 2026-08-21 23:48 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  29. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  30. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  31. 2026-08-18 13:47 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  32. 2026-08-17 13:46 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  33. 2026-08-16 14:55 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  34. 2026-08-16 02:13 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  35. 2026-08-15 01:29 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  36. 2026-08-13 21:59 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  37. 2026-08-12 13:50 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  38. 2026-08-11 13:42 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  39. 2026-08-10 23:59 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  40. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  41. 2026-08-08 16:36 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  42. 2026-08-08 08:42 UTCEG score recompute
  43. 2026-08-08 08:42 UTCVendor advisory
  44. 2026-08-07 16:26 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  45. 2026-08-06 13:46 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  46. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  47. 2026-08-04 15:09 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  48. 2026-08-04 10:37 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  49. 2026-08-03 10:35 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  50. 2026-08-02 02:26 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  51. 2026-08-01 04:15 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  52. 2026-07-30 16:27 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  53. 2026-07-28 15:35 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  54. 2026-07-27 14:12 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  55. 2026-07-26 14:54 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  56. 2026-07-25 14:17 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  57. 2026-07-24 14:17 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  58. 2026-07-23 14:18 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  59. 2026-07-23 13:49 UTCOSV refresh
  60. 2026-07-23 03:01 UTCEG score recompute
  61. 2026-07-22 14:08 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  62. 2026-07-21 15:24 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  63. 2026-07-20 17:08 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  64. 2026-07-19 14:30 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  65. 2026-07-19 02:28 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  66. 2026-07-18 10:04 UTCEPSS rescoreEPSS 0.3% · 21st percentile

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Frequently asked(5)

What is CVE-2025-66293?
CVE-2025-66293 is a high-severity vulnerability; its CVE record was published on December 3, 2025. 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 pngsRGBbase[512] array when…
When was the CVE record for CVE-2025-66293 published?
The CVE record for CVE-2025-66293 was published on December 3, 2025. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of June 17, 2026; the record at its source may have been updated since.
Is CVE-2025-66293 actively exploited?
CVE-2025-66293 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (27th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2025-66293?
CVE-2025-66293 has a CVSS base score of 7.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2025-66293?
A fix for CVE-2025-66293 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2025-66293 are linked in the Vendor Advisories panel on this page.

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