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PatchSiren cyber security CVE debrief

CVE-2026-73524 cypht-org CVE debrief

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-09-01T21:18:36.463Z and has not been modified since then. The CVE-2026-73524 vulnerability in Cypht before 2.12.2 allows remote attackers to execute arbitrary script content via a crafted email in the contacts module. The vulnerability is caused by insufficient sanitization logic that only removes the first occurrence of each angle bracket character, allowing attackers to deliver a crafted email whose FROM header executes script in the victim's browser when the user opens the message and accesses the Add Local Contacts function. System administrators and security teams should review the official advisory and assess the impact on their deployments.

Vendor
cypht-org
Product
cypht
CVSS
MEDIUM 5.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-09-01
Original CVE updated
2026-09-04
Advisory published
2026-09-01
Advisory updated
2026-09-04

Who should care

System administrators and security teams responsible for Cypht installations, as well as users who interact with the contacts module and receive emails from untrusted sources, should review and validate their current version and apply patches or updates as necessary. Additionally, security teams should monitor for suspicious email activity and user behavior, and implement compensating controls such as email content filtering or browser security.

Technical summary

The CVE-2026-73524 vulnerability in Cypht before 2.12.2 allows remote attackers to execute arbitrary script content via a crafted email in the contacts module. The vulnerability is caused by insufficient sanitization logic that only removes the first occurrence of each angle bracket character, allowing attackers to deliver a crafted email whose FROM header executes script in the victim's browser when the user opens the message and accesses the Add Local Contacts function.

Defensive priority

Medium-priority defensive actions are recommended due to the CVSS score of 5.1 and the potential for attackers to execute arbitrary script content.

Recommended defensive actions

  • Inventory Cypht installations and verify versions are up-to-date or patched
  • Implement compensating controls such as email content filtering or browser security
  • Monitor for suspicious email activity and user behavior
  • Restrict access to the contacts module and email functionality
  • Apply the vendor-provided patch or upgrade to version 2.12.2 or later

Evidence notes

The CVE-2026-73524 vulnerability in Cypht before 2.12.2 allows remote attackers to execute arbitrary script content via a crafted email in the contacts module. The vulnerability is caused by insufficient sanitization logic that only removes the first occurrence of each angle bracket character. Evidence is based on official CVE Program and NVD records, as well as source references from [email protected].

Sources and references

Verified primary and authoritative sources

  • CVE-2026-73524 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-73524

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-73524 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-73524

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.