A Deserialization of Untrusted Data issue was discovered in OSIsoft PI Data Archive versions 2017 and prior.

published 2018-03-14 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-19258

cvss: 7.5; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 2.1%; EPSS 2.1% chance of exploitation in 30 days, percentile 81%
public exploits: 0; none known

A Deserialization of Untrusted Data issue was discovered in OSIsoft PI Data Archive versions 2017 and prior. Unauthenticated users may modify deserialized data to send custom requests that crash the server.

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-18-072-02 updated 2018-03-13 cvss 7.5

OSIsoft PI Data Archive

OSIsoft LLC PI Data Archive <=2017
affected: mitigation “OSIsoft recommends that customers upgrade to PI Data Archive 2017 R2. Obtain the update from OSIsoft.” techsupport.osisoft.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

Exploit prediction

2.06% chance of exploitation in the next 30 days, higher than 81% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.0	7.5	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD	2.0	7.8	AV:N/AC:L/Au:N/C:N/I:N/A:C

Affected products

n/a OSIsoft PI Data Archive

Classification

Weakness

CWE-502 Deserialization of Untrusted Data

References

ics-cert.us-cert.gov /advisories/ICSA-18-072-02
third-party-advisory, us-government-resource
securityfocus.com /bid/103399
vdb-entry, third-party-advisory

Sources

CVE List CVE-2018-7529
NVD CVE-2018-7529

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary