CVE-2021-3675
synaTEE.signed.dll Out-Of-Bounds Heap Write
- Published
- Updated
- Reserved
- Assigned by
- Synaptics
Description
Improper Input Validation vulnerability in synaTEE.signed.dll of Synaptics Fingerprint Driver allows a local authorized attacker to overwrite a heap tag, with potential loss of confidentiality. This issue affects: Synaptics Synaptics Fingerprint Driver 5.1.xxx.26 versions prior to xxx=340 on x86/64; 5.2.xxxx.26 versions prior to xxxx=3541 on x86/64; 5.2.2xx.26 versions prior to xx=29 on x86/64; 5.2.3xx.26 versions prior to xx=25 on x86/64; 5.3.xxxx.26 versions prior to xxxx=3543 on x86/64; 5.5.xx.1058 versions prior to xx=44 on x86/64; 5.5.xx.1102 versions prior to xx=34 on x86/64; 5.5.xx.1116 versions prior to xx=14 on x86/64; 6.0.xx.1104 versions prior to xx=50 on x86/64; 6.0.xx.1108 versions prior to xx=31 on x86/64; 6.0.xx.1111 versions prior to xx=58 on x86/64.
Timeline
ID reserved
By Synaptics
- 11 months later
· 11 months later
Published
- 2 years later
· 2 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| SynapticsCNA (assigner) | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
| NVDNVD · Modified | 3.1 | High7.1 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.27% · top 80% of all CVEs (7 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Weakness
Affected products
Synaptics · Synaptics Fingerprint Driver
- affected 5.1.xxx.26 – < xxx=340
- affected 5.2.xxxx.26 – < xxxx=3541
- affected 5.2.2xx.26 – < xx=29
- affected 5.2.3xx.26 – < xx=25
- affected 5.3.xxxx.26 – < xxxx=3543
- affected 5.5.xx.1058 – < xx=44
- affected 5.5.xx.1102 – < xx=34
- affected 5.5.xx.1116 – < xx=14
- affected 6.0.xx.1104 – < xx=50
- affected 6.0.xx.1108 – < xx=31
- affected 6.0.xx.1111 – < xx=58
What to do
Solution: Listed drivers and above have additional input validation.
References (3)
- https://synaptics.com/sites/default/files/2022-06/fingerprint-driver-SGX-security-brief-2022-06-14.pdf (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://support.lenovo.com/us/en/product_security/LEN-68054 (opens in a new tab)x_refsource_MISCx_transferred
- https://support.hp.com/us-en/document/ish_6411153-6411191-16/hpsbhf03797 (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2021-3675)Record last updated .