Is CVE-2026-2645 actively exploited?

No active exploitation of CVE-2026-2645 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-2645 be exploited remotely?

Yes. CVE-2026-2645 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-2645?

CVE-2026-2645 has a CVSS score of 5.5 (MEDIUM).

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MEDIUM

CVE-2026-2645

CWE-358Published: March 19, 2026· Updated: Mar 20, 2026

5.5

CVSS v3.1

EPSS:0.03%probability of exploitation in 30 daysPercentile:6.6th

Official Description

In wolfSSL 5.8.2 and earlier, a logic flaw existed in the TLS 1.2 server state machine implementation. The server could incorrectly accept the CertificateVerify message before the ClientKeyExchange message had been received. This issue affects wolfSSL before 5.8.4 (wolfSSL 5.8.2 and earlier is vulnerable, 5.8.4 is not vulnerable). In 5.8.4 wolfSSL would detect the issue later in the handshake. 5.9.0 was further hardened to catch the issue earlier in the handshake.

NVD Source

Technical Analysis

CVE-2026-2645 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.Low

User InteractionP

ScopeX

Impact

Confidentiality

Integrity

Availability

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X