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HIGH

CVE-2020-7065

CVSS v3

8.8

HIGH

EPSS Score

4.9 %

exploit probability, as of 2026-10-20

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • phpBitnamifrom 7.3.0 · fixed in 7.3.16and 2 other packages
  • apcu-panelAlmaLinux:8all versions · fixed in 5.1.17-1.module_el8.3.0+2009+b272fdef
  • libzipAlmaLinux:8all versions · fixed in 1.5.2-1.module_el8.4.0+2229+b272fdef
  • libzip-develAlmaLinux:8all versions · fixed in 1.5.2-1.module_el8.5.0+152+112d3b8c
  • libzip-toolsAlmaLinux:8all versions · fixed in 1.5.2-1.module_el8.3.0+2009+b272fdef
  • phpAlmaLinux:8all versions · fixed in 7.3.20-1.module_el8.3.0+2009+b272fdefand 7 other packages
  • php-dbaAlmaLinux:8all versions · fixed in 7.3.20-1.module_el8.4.0+2229+b272fdefand 9 other packages
  • php-gdAlmaLinux:8all versions · fixed in 7.3.20-1.module_el8.5.0+152+112d3b8cand 8 other packages

6 more package ranges on OSV.dev

Vendor advisories

  • CVE-2020-7065 Red Hat Product Security605 products fixed

    php: Using mb_strtolower() function with UTF-32LE encoding leads to potential code execution

  • ICSA-26-027-02 CISA1 known affected

    Festo Didactic SE MES PC

    Festo Didactic SE MES PC shipped with Windows 10

  • RHSA-2020:5275 Red Hat Product Security304 products fixed

    Red Hat Security Advisory: rh-php73-php security, bug fix, and enhancement update

  • RHSA-2020:3662 Red Hat Product Security301 products fixed

    Red Hat Security Advisory: php:7.3 security, bug fix, and enhancement update

Full record on NVD

Description

In PHP versions 7.3.x below 7.3.16 and 7.4.x below 7.4.4, while using mb_strtolower() function with UTF-32LE encoding, certain invalid strings could cause PHP to overwrite stack-allocated buffer. This could lead to memory corruption, crashes and potentially code execution.

Technical details

Published
2020-04-01

Frequently asked questions

What is CVE-2020-7065?

In PHP versions 7.3.x below 7.3.16 and 7.4.x below 7.4.4, while using mb_strtolower() function with UTF-32LE encoding, certain invalid strings could cause PHP to overwrite stack-allocated buffer. This could lead to memory corruption, crashes and potentially code execution.

Is CVE-2020-7065 actively exploited?

Active exploitation of CVE-2020-7065 has not been confirmed. Its EPSS score was 4.9% on 2026-10-20, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-7065?

CVE-2020-7065 has a CVSS v3 base score of 8.8 (HIGH severity).

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