Is CVE-2026-9058 actively exploited?

No active exploitation of CVE-2026-9058 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-9058 be exploited remotely?

Yes. CVE-2026-9058 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-9058?

CVE-2026-9058 has a CVSS score of 9.3 (CRITICAL).

HOME VULNERABILITIESCVE-2026-9058

CRITICAL

CVE-2026-9058

CWE-393Published: May 25, 2026· Updated: May 26, 2026

9.3

CVSS v3.1

EPSS:0.04%probability of exploitation in 30 daysPercentile:11.2th

Official Description

Szafir SDK returns a success status code from the cryptographic digital signature verification process (i.e. /VerifyingTaskItem/Signature/VerificationResult/Result/@code == 0, "Positively verified") even when the trust status of the signer's certificate could not be established (i.e. /VerifyingTaskItem/Signature/VerificationResult/SigningCertificate/@certificateType == "nondetermined"). This causes consuming applications to incorrectly treat the signature as valid despite an unverified certificate chain, enabling authentication bypass and user impersonation.

This issue was fixed in version 463.

NVD Source

Technical Analysis

CVE-2026-9058 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.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.None

User InteractionNone

ScopeX

Impact

Confidentiality

Integrity

Availability

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/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