Is CVE-2025-68121 actively exploited?

No active exploitation of CVE-2025-68121 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2025-68121 be exploited remotely?

Yes. CVE-2025-68121 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2025-68121?

CVE-2025-68121 has a CVSS score of 10.0 (CRITICAL).

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CRITICAL

CVE-2025-68121

CWE-295Published: February 5, 2026· Updated: Jun 17, 2026

10.0

CVSS v3.1

Official Description

During session resumption in crypto/tls, if the underlying Config has its ClientCAs or RootCAs fields mutated between the initial handshake and the resumed handshake, the resumed handshake may succeed when it should have failed. This may happen when a user calls Config.Clone and mutates the returned Config, or uses Config.GetConfigForClient. This can cause a client to resume a session with a server that it would not have resumed with during the initial handshake, or cause a server to resume a session with a client that it would not have resumed with during the initial handshake.

NVD Source

Risk Analysis

A flaw in TLS session resumption allows for successful handshakes even when CA configurations are mutated, potentially leading to unauthorized session resumption. Given the critical CVSS score of 10.0, this represents a significant risk to secure communication integrity.

No public exploit is currently known, and the vulnerability is not in the CISA KEV database.

Recommended Action

Upgrade to a patched version of Go that addresses this session resumption logic error.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2025-68121 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 10.0.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.