CVE-2020-17405: This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Se

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HIGH 8.8DOWNGRADE

CVE-2020-17405 is a high-severity flaw (CVSS 8.8) affecting symphony. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Senstar Symphony 7.3.2.2. Authentication is not required to exploit this vulnerability. The specific flaw exists within the SSOAuth process. The issue results from the lack of proper validation of user-supplied data, which can result in deserialization of untrusted data. An attacker can leverage this vulnerability to execute code in the con

Why this priority

High severity

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	8.8 (High)
Attack vector	Adjacent network
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.0% (top 19%)
CISA exploited list	No
Weakness	CWE-502
Published	2020-09-01
Last modified	2026-06-17

Publisher (CNA): Zero Day Initiative · Vendor: senstar

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

Am I affected?

Timeline

2020-09-01 18:15 UTCPublished CVE record published
2026-06-17 02:58 UTCUpdated Record last modified

senstar symphony DOWNGRADE

Affected: 7.3.2.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 7.3.2.2

1. Check installed version

apt-cache policy symphony || rpm -q symphony || symphony --version

2. No fixed release: DOWNGRADE to a release before 7.3.2.2 (Debian / Ubuntu)

apt-cache madison symphony sudo apt install symphony=<VERSION_BEFORE_7.3.2.2> sudo apt-mark hold symphony

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list symphony sudo dnf downgrade symphony-<VERSION_BEFORE_7.3.2.2> sudo dnf versionlock add symphony

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2020-17405?

symphony: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2020-17405 being exploited?

CVE-2020-17405 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-2020-17405 affect?

CVE-2020-17405 affects symphony. Severity is high (CVSS 8.8). This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Senstar Symphony 7.3.2.2. Authentication is not required to exploit this vulnerability. The specific flaw exists within the SSOAuth

How urgent is CVE-2020-17405?

Priority 51/100. High severity

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CVE-2020-15071 MEDIUM 6.1 DOWNGRADE content/content.blueprintsevents.php in Symphony CMS 3.0.0 allows XSS via fields['name'] to appendSubheading.
CVE-2019-9142 MEDIUM 6.1 UPGRADE An issue was discovered in b3log Symphony (aka Sym) before v3.4.7
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References

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