Is CVE-2026-35537 actively exploited?

No active exploitation of CVE-2026-35537 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-35537 be exploited remotely?

Yes. CVE-2026-35537 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-35537?

CVE-2026-35537 has a CVSS score of 3.7 (LOW).

HOME VULNERABILITIESCVE-2026-35537

LOW

CVE-2026-35537

CWE-502Published: April 3, 2026· Updated: Apr 3, 2026

3.7

CVSS v3.1

EPSS:0.03%probability of exploitation in 30 daysPercentile:8.6th

Official Description

An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. Unsafe deserialization in the redis/memcache session handler may lead to arbitrary file write operations by unauthenticated attackers via crafted session data.

NVD Source

Technical Analysis

CVE-2026-35537 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.

From a weakness classification perspective (CWE-502): Insecure deserialization vulnerabilities allow attackers to inject malicious objects during deserialization, potentially enabling remote code execution.