CVE-2015-7286: CSL DualCom GPRS CS2300-R devices with firmware 1.25 through 3.53 rely on a polyalphabetic substitution cipher

This month

MEDIUM 6.4MITIGATE

CVE-2015-7286 is a medium-severity flaw (CVSS 6.4) affecting gprs cs2300-r firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

CSL DualCom GPRS CS2300-R devices with firmware 1.25 through 3.53 rely on a polyalphabetic substitution cipher with hardcoded keys, which makes it easier for remote attackers to defeat a cryptographic protection mechanism by capturing IP or V.22bis PSTN protocol traffic.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	6.4 (Medium)
EPSS exploit chance	2.1% (top 18%)
CISA exploited list	No
Weakness	CWE-310
Published	2015-11-25
Last modified	2026-06-17

Publisher (CNA): CERT/CC · Vendor: csl dualcom

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

Am I affected?

Timeline

2015-11-25 04:59 UTCPublished CVE record published
2026-06-17 00:32 UTCUpdated Record last modified

csl dualcom gprs cs2300-r firmware MITIGATE

Affected: 1.25 · 3.53

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.25

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

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-2015-7286?

gprs cs2300-r firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2015-7286 being exploited?

CVE-2015-7286 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-2015-7286 affect?

CVE-2015-7286 affects gprs cs2300-r firmware. Severity is medium (CVSS 6.4). CSL DualCom GPRS CS2300-R devices with firmware 1.25 through 3.53 rely on a polyalphabetic substitution cipher with hardcoded keys, which makes it easier for remote attackers to defeat a cryptographic protection mechanism by capturing IP or

How urgent is CVE-2015-7286?

Priority 48/100. Public exploit reference

Related CVEs

CVE-2015-7288 MEDIUM 4.3 MITIGATE CSL DualCom GPRS CS2300-R devices with firmware 1.25 through 3.53 allow remote attackers to modify the configu
CVE-2015-7287 HIGH 7.5 MITIGATE CSL DualCom GPRS CS2300-R devices with firmware 1.25 through 3.53 use the same 001984 default PIN across diffe
CVE-2015-7285 MEDIUM 5.8 MITIGATE CSL DualCom GPRS CS2300-R devices with firmware 1.25 through 3.53 do not require authentication from Alarm Rec

References

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