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Exploited vulnerability · CISA KEV

Is CVE-2025-27363 exploited? Yes: in CISA KEV since 6 May 2025

Gociux · FreeType · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2025-27363, FreeType Out-of-Bounds Write Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 6 May 2025, 56 days after it was published. It affects FreeType. If you run it, CISA's required action is: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

exploitedYesCISA KEV · 6 May 2025
ransomwareNot knownno confirmed use
EPSStop 5%very likely to be exploited
severity8.1CVSS 3.1 · high
US federal due27 May 2025BOD 22-01 deadline

What it is

FreeType contains an out-of-bounds write vulnerability when attempting to parse font subglyph structures related to TrueType GX and variable font files that may allow for arbitrary code execution.

VendorFreeType (1 exploited CVE in KEV)
ProductFreeType
VulnerabilityFreeType Out-of-Bounds Write Vulnerability
WeaknessCWE-787
Published11 Mar 2025
Added to KEV6 May 2025
Reported by (CNA)facebook

What to do

  1. Check whether you run it. Look for FreeType in your asset inventory, including appliances and cloud images. Stack check lists every exploited FreeType CVE at once.
  2. Apply the fix. Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
  3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 11 Mar 2025.
  4. Get told next time. Email alerts when CISA adds a CVE for FreeType.

References

Questions

Is CVE-2025-27363 being exploited?

Yes. CISA added CVE-2025-27363 to the Known Exploited Vulnerabilities catalog on 6 May 2025, which means there is reliable evidence of exploitation in the wild.

Is CVE-2025-27363 used in ransomware attacks?

CISA does not list known ransomware use for it. That can change, and exploitation alone is reason to fix it first.

How do I fix CVE-2025-27363?

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. Check FreeType's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected FreeType and watch it for signs of compromise.

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in May 2025 · act-now radar.

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