ARC Informatique PcVue Access to Critical Private Variable via Public Method

published 2020-10-12 6 y ago modified 2026-07-09 4 mo ago also EUVD-2020-19404

cvss: 7.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 2.2%; EPSS 2.2% chance of exploitation in 30 days, percentile 82%
public exploits: 0; none known

ARC Informatique PcVue prior to version 12.0.17 is vulnerable to a denial-of-service attack due to the ability of an unauthorized user to modify information used to validate messages sent by legitimate web clients. This issue also affects third-party systems based on the Web Services Toolkit.

Patch / fix

fixed in 1

arcinfo pcvue 12.0.17

Vendor advisories

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

cisa ICSA-20-308-03 updated 2021-01-05 cvss 7.5

ARC Informatique PcVue (Update A)

ARC Informatique PcVue >= 8.10, < 12.0.17
affected: vendor fix, mitigation “Patches are available for Version 12 (12.0.17 Maintenance Release) and Version 11.2 (11.2.06097 Update).” pcvuesolutions.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

2.15% chance of exploitation in the next 30 days, higher than 82% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD	2.0	5.0	AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

ARC Informatique PcVue

Classification

Weakness

CWE-767 Access to Critical Private Variable via Public Method
CWE-668 Exposure of Resource to Wrong Sphere

References

pcvuesolutions.com /security
vendor-advisory
pcvuesolutions.com /support/index.php/en/security-bulletin/1076-security-bulletin-2020-1
permissions-required, vendor-advisory
us-cert.cisa.gov /ics/advisories/icsa-20-308-03
third-party-advisory, us-government-resource
ics-cert.kaspersky.com /advisories/klcert-advisories/2020/10/09/klcert-20-016-denial-of-service-in-arc-informatique-pcvue/
broken-link

Sources

CVE List CVE-2020-26868
NVD CVE-2020-26868

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