CVE-2015-1171: Stack-based buffer overflow in GSM SIM Utility (aka SIM Card Editor) 6.6 allows remote attackers to execute ar

This week

HIGH 10.0DOWNGRADE

CVE-2015-1171 is a high-severity flaw (CVSS 10.0) affecting sim card editor. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Stack-based buffer overflow in GSM SIM Utility (aka SIM Card Editor) 6.6 allows remote attackers to execute arbitrary code via a long entry in a .sms file.

Why this priority

Critical severity
EPSS top 1%: very likely to be exploited
Public exploit reference

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

Risk facts

CVSS score	10.0 (High)
EPSS exploit chance	62.7% (top 1%)
CISA exploited list	No
Weakness	CWE-119
Published	2015-08-28
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: gsm

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

Am I affected?

Timeline

2015-08-28 21:59 UTCPublished CVE record published
2026-06-17 00:21 UTCUpdated Record last modified

gsm sim card editor DOWNGRADE

Affected: 6.6

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.6

1. Check installed version

apt-cache policy sim-card-editor || rpm -q sim-card-editor || sim-card-editor --version

2. No fixed release: DOWNGRADE to a release before 6.6 (Debian / Ubuntu)

apt-cache madison sim-card-editor sudo apt install sim-card-editor=<VERSION_BEFORE_6.6> sudo apt-mark hold sim-card-editor

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

dnf --showduplicates list sim-card-editor sudo dnf downgrade sim-card-editor-<VERSION_BEFORE_6.6> sudo dnf versionlock add sim-card-editor

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.

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: Sim Editor 6.6 - Local Stack Buffer Overflow
Metasploit: GSM SIM Editor 5.15 Buffer Overflow

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-2015-1171?

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

Is CVE-2015-1171 being exploited?

CVE-2015-1171 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-2015-1171 affect?

CVE-2015-1171 affects sim card editor. Severity is high (CVSS 10.0). Stack-based buffer overflow in GSM SIM Utility (aka SIM Card Editor) 6.6 allows remote attackers to execute arbitrary code via a long entry in a .sms file.

How urgent is CVE-2015-1171?

Priority 65/100. Critical severity; EPSS top 1%: very likely to be exploited; Public exploit reference

References

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