CVE-2020-29540: API calls in the Translation API feature in Systran Pure Neural Server before 9.7.0 allow a threat actor to us

Q: How do I fix CVE-2020-29540?

pure neural server: upgrade to 9.7.0. Exact commands for each OS are on this page.

Q: Is CVE-2020-29540 being exploited?

CVE-2020-29540 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2020-29540 affect?

CVE-2020-29540 affects pure neural server. Severity is high (CVSS 7.5). API calls in the Translation API feature in Systran Pure Neural Server before 9.7.0 allow a threat actor to use the Systran Pure Neural Server as a Denial-of-Service proxy by sending a large amount of translation requests to a destination h

Q: How urgent is CVE-2020-29540?

Priority 53/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 7.5REMOTEUPGRADE

CVE-2020-29540 is a high-severity flaw (CVSS 7.5) affecting pure neural server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

API calls in the Translation API feature in Systran Pure Neural Server before 9.7.0 allow a threat actor to use the Systran Pure Neural Server as a Denial-of-Service proxy by sending a large amount of translation requests to a destination host on any given TCP port regardless of whether a web service is running on the destination port.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.2% (top 32%)
CISA exploited list	No
Published	2020-12-08
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: systransoft

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-12-08 13:15 UTCPublished CVE record published
2026-06-17 03:11 UTCUpdated Record last modified

systransoft pure neural server UPGRADE

Affected: < 9.7.0

Fixed in: 9.7.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy pure-neural-server || rpm -q pure-neural-server || pure-neural-server --version

2. UPGRADE to 9.7.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade pure-neural-server

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade pure-neural-server

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2020-29540?

pure neural server: upgrade to 9.7.0. Exact commands for each OS are on this page.

Is CVE-2020-29540 being exploited?

CVE-2020-29540 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2020-29540 affect?

CVE-2020-29540 affects pure neural server. Severity is high (CVSS 7.5). API calls in the Translation API feature in Systran Pure Neural Server before 9.7.0 allow a threat actor to use the Systran Pure Neural Server as a Denial-of-Service proxy by sending a large amount of translation requests to a destination h

How urgent is CVE-2020-29540?

Priority 53/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2020-29539 MEDIUM 5.4 UPGRADE A Cross-Site Scripting (XSS) issue in WebUI Translation in Systran Pure Neural Server before 9.7.0 allows a th

References

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