CVE-2026-19721TÜBİTAK BİLGEM Software Technologies Research Institute İmzager XML external entity
CVE-2026-19721 is a XML external entity in TÜBİTAK BİLGEM Software Technologies Research Institute İmzager, rated low (3.3 on CVSS 3.1).
Why this priority: Low severity, with no exploitation signal.
Published · Updated · NVD status: Deferred
What it is
The XML parser resolves external entities, so a crafted document can read local files or reach internal hosts.
How it is reached
An attacker can exploit it by someone who can already run code or sign in on the machine, without an account, but someone has to act first, such as opening a file or following a link.
What an attacker gains
The direct impact is limited: partial access to data or a partial outage. In practice, this kind of flaw lets an attacker read local files or reach internal hosts through the parser.
Is it being exploited?
There is no public report of exploitation yet. EPSS estimates a 0.11% chance of exploitation activity in the next 30 days, higher than 1% of scored CVEs.
What to do
- Upgrade TÜBİTAK BİLGEM Software Technologies Research Institute İmzager to 2.10.7 or later.
- Limit who can run code or sign in on the hosts that run it.
- Warn the people who use it, and filter files and links on the way in.
Description from NVD
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 this means for your architecture.
A CVE names a product. Whether it matters depends on where that product sits in your systems: what reaches it, which trust boundary it guards and what it can reach once compromised. Veriom maps your components, their relationships and your trust boundaries from your code, cloud and delivery evidence, so you can see where a component like this sits. The radar itself does not look at your systems.
Components it touches
- XML and document parsers in APIs and import features. The flaw sits between uploaded or posted documents and the service parsing them.
Trust boundaries in play
- Host boundary. The attacker needs a foothold on the machine first; the flaw turns a small foothold into a bigger one.
- People who open files and links. Mail, chat and browsers are the delivery path.
- Between uploaded or posted documents and the service parsing them. An attacker who crosses it can read local files or reach internal hosts through the parser.
Questions to answer about your own systems
- Where does TÜBİTAK BİLGEM Software Technologies Research Institute İmzager run in your systems, and at which version?
- Which of those hosts also run code or users you do not fully trust?
- What can it reach once compromised: which data stores, secrets and services?
Sources
- CVE records and CVSS scores from the NVD CVE API. This product uses the NVD API but is not endorsed or certified by the NVD.
- Exploitation status from CISA’s Known Exploited Vulnerabilities catalog.
- Exploit likelihood from FIRST’s Exploit Prediction Scoring System (EPSS), refreshed daily.
- Explanations are written by Veriom from fixed templates over each record’s data, not by a person reviewing each CVE. Descriptions are quoted from the records as published.