CVE-2017-2785: An exploitable buffer overflow exists in the psnotifyd application of the Pharos PopUp printer client version

This week

CRITICAL 10.0REMOTEDOWNGRADE

CVE-2017-2785 is a critical-severity flaw (CVSS 10.0) affecting popup. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An exploitable buffer overflow exists in the psnotifyd application of the Pharos PopUp printer client version 9.0. A specially crafted packet can be sent to the victim's computer and can lead to a heap based buffer overflow resulting in remote code execution. This client is always listening, has root privileges, and requires no user interaction to exploit.

Why this priority

Critical severity
EPSS top 8%: very likely to be exploited
Remotely exploitable, no login, no user action

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

Risk facts

CVSS score	10.0 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	5.1% (top 8%)
CISA exploited list	No
Weakness	CWE-119
Published	2017-03-10
Last modified	2026-06-17

Publisher (CNA): Talos · Vendor: pharos

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

Am I affected?

Timeline

2017-03-10 10:59 UTCPublished CVE record published
2026-06-17 01:16 UTCUpdated Record last modified

pharos popup DOWNGRADE

Affected: 9.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 9.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 9.0 (Debian / Ubuntu)

apt-cache madison popup sudo apt install popup=<VERSION_BEFORE_9.0> sudo apt-mark hold popup

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

dnf --showduplicates list popup sudo dnf downgrade popup-<VERSION_BEFORE_9.0> sudo dnf versionlock add popup

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-2017-2785?

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

Is CVE-2017-2785 being exploited?

CVE-2017-2785 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-2017-2785 affect?

CVE-2017-2785 affects popup. Severity is critical (CVSS 10.0). An exploitable buffer overflow exists in the psnotifyd application of the Pharos PopUp printer client version 9.0. A specially crafted packet can be sent to the victim's computer and can lead to a heap based buffer overflow resulting in rem

How urgent is CVE-2017-2785?

Priority 63/100. Critical severity; EPSS top 8%: very likely to be exploited; Remotely exploitable, no login, no user action

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References

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