SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityModified

CVE-2002-1407

TinySSL 1.02 and earlier does not verify the Basic Constraints for an intermediate CA-signed certificate, which allows remote attackers to spoof the certificates of trusted sites via a man-in-the-middle attack.

HIGH 7.5EPSS 1.06%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (1.06%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

TinySSL 1.02 and earlier does not verify the Basic Constraints for an intermediate CA-signed certificate, which allows remote attackers to spoof the certificates of trusted sites via a man-in-the-middle attack.

CVSS 2.0
7.5 HIGHAV:N/AC:L/Au:N/C:P/I:P/A:P
EPSS
1.06% probability · 64th percentile
Public exploits
None in Exploit-DB
CISA KEV
Not listed
Affected
adam megacz/tinyssl
Source
cve@mitre.org
EPSS trend
0%3%5%26 October 2026: 1.06%26 October 202626 October 2026

EPSS 1.1% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.