CVE-2026-93581Network attack vectorHinoki check available

Information disclosure via unneutralized CSV formulas

Published Oct 12, 2026 · Updated Oct 12, 2026

CSV formula injection in OTRS exports allows remote attackers to disclose information through spreadsheet processing of crafted values. OTRS and ((OTRS)) Community Edition export stored user input without neutralizing leading =, +, -, or @ characters, allowing spreadsheet software to interpret those values as formulas. Incoming email can supply affected fields without an account; exploitation requires opening an export and depends on spreadsheet settings and warning confirmations, with no code execution on the OTRS server.

CVSS severity6.1
Medium
EPSS probability0.19%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

CSV formula injection in OTRS exports allows remote attackers to disclose information through spreadsheet processing of crafted values. OTRS and ((OTRS)) Community Edition export stored user input without neutralizing leading =, +, -, or @ characters, allowing spreadsheet software to interpret those values as formulas. Incoming email can supply affected fields without an account; exploitation requires opening an export and depends on spreadsheet settings and warning confirmations, with no code execution on the OTRS server.

The record

CVE
CVE-2026-93581
Published
Oct 12, 2026
Updated
Oct 12, 2026
Vendor
OTRS GmbH
Product
OTRS
Classifications
CWE-1236, CAPEC-23, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 12, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 12, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=2023.x
  2. Affected versionversion=2024.x
  3. Affected versionversion=2025.x
  4. Affected versionversion=2026.x <=2026.6.x
  5. Affected versionversion=7.0.x
  6. Affected versionversion=8.0.x

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

OTRS GmbH · OTRSversion=2023.x; version=2024.x; version=2025.x; version=2026.x <=2026.6.x; version=7.0.x; version=8.0.x
OTRS GmbH · ((OTRS)) Community Editionversion=6.x

Published CVSS scores

6.1OTRSCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A: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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-1236Improper Neutralization of Formula Elements in a CSV File
CAPEC-23File Content Injection
T1204.002Malicious File

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

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Your stack

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