CVE-2026-61525Network attack vectorHinoki check available

Arbitrary file deletion via unvalidated session identifiers

Published Sep 25, 2026 · Updated Sep 25, 2026

Path traversal in Zammad 7.0.2 and 7.1.0 allows remote authenticated users to delete arbitrary server files and directories. Websocket and long-polling session management constructs internal file paths from client-supplied session identifiers without adequately restricting traversal elements. With the default file-based session store, one crafted request from a low-privilege session can remove paths outside session storage; Redis-backed instances are unaffected.

CVSS severity8.8
High
EPSS probability0.36%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Get started

Summary

What happened

Path traversal in Zammad 7.0.2 and 7.1.0 allows remote authenticated users to delete arbitrary server files and directories. Websocket and long-polling session management constructs internal file paths from client-supplied session identifiers without adequately restricting traversal elements. With the default file-based session store, one crafted request from a low-privilege session can remove paths outside session storage; Redis-backed instances are unaffected.

The record

CVE
CVE-2026-61525
Published
Sep 25, 2026
Updated
Sep 25, 2026
Vendor
Zammad GmbH
Product
Zammad
Classifications
CWE-22, T1070.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion== 7.0.2
  2. Affected versionversion== 7.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Zammad GmbH · Zammadversion== 7.0.2; version== 7.1.0

Published CVSS scores

8.8GitHub Security AdvisoryCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1070.004File Deletion

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Get started to see how Hinoki identifies affected software and validates exploitability in your environment.

Get started