CVE-2011-4520: Heap-based buffer overflow in an ActiveX component in MICROSYS PROMOTIC before 8.1.5 allows remote attackers t

Q: How do I fix CVE-2011-4520?

promotic: upgrade to newer than 8.1.4. Exact commands for each OS are on this page.

Q: Is CVE-2011-4520 being exploited?

CVE-2011-4520 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2011-4520 affect?

CVE-2011-4520 affects promotic. Severity is medium (CVSS 4.3). Heap-based buffer overflow in an ActiveX component in MICROSYS PROMOTIC before 8.1.5 allows remote attackers to cause a denial of service via a crafted web page.

Q: How urgent is CVE-2011-4520?

Priority 41/100. Public exploit reference

This month

MEDIUM 4.3UPGRADE

CVE-2011-4520 is a medium-severity flaw (CVSS 4.3) affecting promotic. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Heap-based buffer overflow in an ActiveX component in MICROSYS PROMOTIC before 8.1.5 allows remote attackers to cause a denial of service via a crafted web page.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	4.3 (Medium)
EPSS exploit chance	2.4% (top 16%)
CISA exploited list	No
Weakness	CWE-119
Published	2013-05-23
Last modified	2026-06-16

Publisher (CNA): CERT/CC · Vendor: microsys

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2013-05-23 17:55 UTCPublished CVE record published
2026-06-16 23:34 UTCUpdated Record last modified

microsys promotic UPGRADE

Affected: <= 8.1.4 · 8.0.0 · 8.0.1 · 8.0.2 · 8.0.3 · 8.0.4 · 8.0.5 · 8.0.6

Fixed in: newer than 8.1.4

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 8.1.4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade promotic

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade promotic

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: Microsys PROMOTIC 8.1.4 - ActiveX GetPromoticSite Unitialized Pointer

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-2011-4520?

promotic: upgrade to newer than 8.1.4. Exact commands for each OS are on this page.

Is CVE-2011-4520 being exploited?

CVE-2011-4520 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-2011-4520 affect?

CVE-2011-4520 affects promotic. Severity is medium (CVSS 4.3). Heap-based buffer overflow in an ActiveX component in MICROSYS PROMOTIC before 8.1.5 allows remote attackers to cause a denial of service via a crafted web page.

How urgent is CVE-2011-4520?

Priority 41/100. Public exploit reference

Related CVEs

CVE-2016-0869 MEDIUM 5.0 UPGRADE Heap-based buffer overflow in MICROSYS PROMOTIC before 8.3.11 allows remote authenticated users to cause a den
CVE-2014-9205 HIGH 7.5 UPGRADE Stack-based buffer overflow in the PmBase64Decode function in an unspecified demonstration application in MICR
CVE-2014-1617 MEDIUM 6.5 DOWNGRADE Microsys PROMOTIC 8.2.13 contains an ActiveX Control Start Buffer Overflow vulnerability which can lead to den
CVE-2011-4519 MEDIUM 4.3 UPGRADE Stack-based buffer overflow in an ActiveX component in MICROSYS PROMOTIC before 8.1.5 allows remote attackers
CVE-2011-4518 MEDIUM 5.0 UPGRADE Directory traversal vulnerability in the PmWebDir object in the web server in MICROSYS PROMOTIC before 8.1.5 a

References

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