CVE-2025-27363
8.1, high Known exploitedFreeType Out-of-Bounds Write Vulnerability
- CVSS
- 8.1, high high CVSS v3.1
- EPSS, next 30 days
- 28% higher than 98% of scored CVEs
- Exploitation
- Confirmed in the wild
- Published
- 11 Mar 2025a year ago
Known exploited
CISA added this to the Known Exploited Vulnerabilities Catalog on 6 May 2025. US federal agencies had to remediate by 27 May 2025, a deadline that has passed.
Required action. Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Description
An out of bounds write exists in FreeType versions 2.13.0 and below (newer versions of FreeType are not vulnerable) when attempting to parse font subglyph structures related to TrueType GX and variable font files. The vulnerable code assigns a signed short value to an unsigned long and then adds a static value causing it to wrap around and allocate too small of a heap buffer. The code then writes up to 6 signed long integers out of bounds relative to this buffer. This may result in arbitrary code execution. This vulnerability may have been exploited in the wild.
Details
- Vendor
- FreeType
- Product
- FreeType
- Weakness
- CWE-787 (opens in a new tab)
- Status
- Analyzed
- Updated
- 17 Jun 2026
- Assigner
- cve-assign@fb.com
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
References 17
Advisories 15
- openwall.com /lists/oss-security/2025/03/13/1 (opens in a new tab)
- openwall.com /lists/oss-security/2025/03/13/11 (opens in a new tab)
- openwall.com /lists/oss-security/2025/03/13/12 (opens in a new tab)
- openwall.com /lists/oss-security/2025/03/13/2 (opens in a new tab)
- openwall.com /lists/oss-security/2025/03/13/3 (opens in a new tab)
- openwall.com /lists/oss-security/2025/03/13/8 (opens in a new tab)
- openwall.com /lists/oss-security/2025/03/14/1 (opens in a new tab)
- openwall.com /lists/oss-security/2025/03/14/2 (opens in a new tab)
7 more
- openwall.com /lists/oss-security/2025/03/14/3 (opens in a new tab)
- openwall.com /lists/oss-security/2025/03/14/4 (opens in a new tab)
- openwall.com /lists/oss-security/2025/05/06/3 (opens in a new tab)
- openwall.com /lists/oss-security/2026/04/16/5 (opens in a new tab)
- openwall.com /lists/oss-security/2026/04/19/3 (opens in a new tab)
- source.android.com /docs/security/bulletin/2025-05-01 (opens in a new tab)
- facebook.com /security/advisories/cve-2025-27363 (opens in a new tab)
The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.
Beyond this page
Is CVE-2025-27363 in your network?
This page tells you how dangerous CVE-2025-27363 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.
CVE-2025-27363 is in the CISA catalogue of exploited vulnerabilities: attackers are already exploiting it.
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EXYS7600 OCELOT
Find it before attackers do
Ocelot scans your network on a schedule and reports every vulnerability it finds by its CVE identifier, with its CVSS score and how many of your hosts are affected. A finding like CVE-2025-27363 comes with the devices to patch.
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EXYS7950 KONDRA
Detect it if it's exploited
Until the patch is applied, Kondra monitors your network, events and endpoints in real time. It keeps an inventory of the software installed on every endpoint, and its anomaly detection rules flag what an attacker does once inside.
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Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 17 Oct 2026, not the live upstream state.