Stack-based buffer overflow in the GoAhead Web Server on Schneider Electric Modicon M340 PLC BMXNOx and BMXPx devices allows remote attacke…

published 2015-12-21 10 y ago modified 2026-06-17 4 mo ago also EUVD-2015-7835

cvss: 10.0; version 2.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 7.4%; EPSS 7.4% chance of exploitation in 30 days, percentile 94%
public exploits: 0; none known

Stack-based buffer overflow in the GoAhead Web Server on Schneider Electric Modicon M340 PLC BMXNOx and BMXPx devices allows remote attackers to execute arbitrary code via a long password in HTTP Basic Authentication data.

Vendor advisories

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

cisa ICSA-15-351-01 updated 2025-06-09 cvss 7.5

Schneider Electric Modicon M340 Buffer Overflow Vulnerability

Schneider Electric Modicon M340 PLC BMXNOC0401, BMXNOE0100, BMXNOE0100H, BMXNOE0110
affected: mitigation “Install firmware newer than January 16, 2016.”

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

7.35% chance of exploitation in the next 30 days, higher than 94% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	2.0	10.0	AV:N/AC:L/Au:N/C:C/I:C/A:C

Classification

Weakness

CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

download.schneider-electric.com /files?p_Doc_Ref=SEVD-2015-344-01
vendor-advisory
ics-cert.us-cert.gov /advisories/ICSA-15-351-01
third-party-advisory, us-government-resource
securityfocus.com /bid/79622
vdb-entry

Sources

CVE List CVE-2015-7937
NVD CVE-2015-7937

Fencer Intel 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