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What is CVE-2026-102059?A high-severity flaw, explained.

High severity0 affected products
The short answer

CVE-2026-102059 is a high-severity flaw (CVSS 8.7) in the software it affects, published on 14 October 2026. It is not on the list of flaws known to be exploited today. The latest forecast puts its chance of use in the next 30 days at 3.9%. If you run an affected version, plan in the vendor’s fix.

Check if it affects you →How to fix it

Published 14 October 2026. Record last updated 15 October 2026. We keep this page's data up to date.

What it does

What is CVE-2026-102059? In plain terms.

An attacker has to be on the same local network without logging in, and nobody has to click anything.

The official description

An Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') vulnerability in the phone-home daemon (phcd) of Juniper Networks Junos OS and Junos OS Evolved on EX Series, SRX Series, and QFX Series allows an adjacent unauthenticated attacker to execute arbitrary commands with root privileges via a rogue DHCP server.

What kind of flaw is it?

  • CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CVSS 4.0 scoreHigh · 8.7

How an attack on it works

Read straight from its severity rating, translated out of the shorthand.

  • Where an attacker can beOn the same local network
  • How hard it is to pull offEasy: no special conditions
  • Login needed firstNo login needed
  • Does someone have to clickNo, nobody has to do anything

Severity vector: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:A/V:C/RE:M/U:X

Exploitation

Is CVE-2026-102059 being exploited? Not that we know of.

It is not on the list of flaws known to be exploited today. The latest forecast puts the chance of it being used in the next 30 days at 3.9%. That can change at any time, which is why we keep watching.

Known to be exploitedNoNot on the list of exploited flaws today
Chance of use in the next 30 days3.9%Its EPSS score, from the latest forecast

Timeline

  1. Published
  2. Record last updated
How Precursor Intelligence ranks it
48out of 100Medium

CVE-2026-102059 scores 48. Action: Plan remediation.

We keep the score of every published flaw up to date as the evidence changes. Four things go into the score, and evidence that criminals are actually using it counts most. In order:

  • Evidence it is being exploitedBiggest factor
  • How severe it isStrong factor
  • How widely exposed it isSmaller factor
  • Threat activity around itSmaller factor

85 and above is Critical. Anything confirmed as exploited is always marked for an emergency patch, whatever its score.

When CVE-2026-102059 matches software you track, it lands in your list with its score and the reasons behind it.

See your own ranked list →
Affected products

Who is affected by CVE-2026-102059? 0 products.

Here is what the published record lists as affected.

No affected products have been listed for this flaw yet. That usually means the record is still being analysed.

Remediation

How do I fix CVE-2026-102059? Four steps.

  1. Check whether you run itCompare your versions with the affected products above. Not sure what you run? Precursor Intelligence can work it out from your public website, or you can pick it from a list.
  2. Apply the vendor’s fixInstall the latest update from the vendor. The references list where the vendor has published details.
  3. If you can’t patch todayFollow any mitigation the vendor publishes, and limit who can reach the affected system from the internet until the update is in.
  4. Keep an eye on itTrack the product and we tell you as soon as we spot this flaw on the list of exploited flaws, or a jump in its exploit likelihood.

References

1 link
Precursor Intelligence

Does CVE-2026-102059 affect you? We'll keep checking.

Looking flaws up one at a time doesn't scale. Tell us what you run once, and we tell you which flaws matter to you, in what order, and keep watching for new ones.

  1. Tell us what you runPick your software from a list, or let us work it out from your website.
  2. We match it to every flawOver 400,000 published flaws, checked against your list.
  3. Ranked by real-world riskA 0 to 100 score, led by evidence criminals are using it.
  4. Told as soon as we knowAn alert by email, in the app or by webhook to your own tools.
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FAQ

Common questions, answered plainly.

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CVE-2026-102059 is a high-severity flaw in the software it affects, published on 14 October 2026. An attacker has to be on the same local network without logging in, and nobody has to click anything.

It scores 8.7 out of 10 on the CVSS severity scale, which is high. Our risk score for CVE-2026-102059 is 48 out of 100, which is Medium. Its action is "Plan remediation". No sign of exploitation and a low forecast. Patch it in your normal update cycle.

It is not on the list of flaws known to be exploited today. The latest forecast puts the chance of it being used in the next 30 days at 3.9%. That can change at any time, which is why we keep watching.

Install the update the vendor names in its advisory. If you can't patch today, follow the vendor's mitigation and limit who can reach the affected system from the internet.

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