CVE-2026-35537

highpriority · track · 30EPSS 0.005 · 41 %ileDEEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.47% (41st) EPSS

CVSS 7.5 · high

Is it mine?

14 products

Check your exposure

Who says so?

6 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-26

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.

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–high · 3.7–7.5

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.17.5highAV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:Nsecondary · FSTEC (BDU) RU

v3.13.7lowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:Nsecondary · ENISA EU

v3.13.7lowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:Nsecondary · cve@mitre.org USexploitability 2.2 · impact 1.4

v3.13.7lowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:Nsecondary · OSV

v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-502USCWE-502USCWE-502US

affected products (14)

Products and version ranges known to be affected.

Debian Linuxall versionscert_bundDEcpe:/o:debian:debian_linux:-
SUSE openSUSEall versionscert_bundDEcpe:/o:suse:opensuse:-
Open Source Roundcube< 1.5.14cert_bundDE
Open Source Roundcube< 1.6.14cert_bundDE
Open Source Roundcube< 1.7-rc5cert_bundDE
Roundcube Webmail0 → 1.5.14enisa_euvdEU
Roundcube Webmail1.6.0 → 1.6.14enisa_euvdEU
The RoundCube Team RoundCube Webmail≤ 1.7-rc5fstec_bduRU
The RoundCube Team RoundCube Webmail≤ 1.6.14fstec_bduRU
The RoundCube Team RoundCube Webmail≤ 1.5.14fstec_bduRU
ООО «Ред Софт» РЕД ОС≤ 8.0fstec_bduRU
roundcube webmail< 1.5.14nvdUScpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:*
roundcube webmail1.6.0 → 1.6.14nvdUScpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:*
Packagist roundcube/roundcubemail1.7-beta → 1.7-rc5osvUSpkg:composer/roundcube/roundcubemail

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-0789Roundcube: Mehrere SchwachstellenDeutsch2026-03-18csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Roundcube ausnutzen, um Dateien zu manipulieren, um Sicherheitsvorkehrungen zu umgehen, um einen Cross-Site Scripting Angriff durchzuführen, und um Informationen offenzulegen.
GHSA-rxj3-rrwm-pj4rRoundcube Webmail: Unsafe deserialization in the redis/memcache session handler2026-04-03ghsa · osvUS
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.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund nvd osv NVD CVE.org MITRE

published 2026-04-03modified 2026-07-24

references (23)

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan