CVE-2020-27542: Rostelecom CS-C2SHW 5.0.082.1 is affected by: Bash command injection

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MEDIUM 6.8MITIGATE

CVE-2020-27542 is a medium-severity flaw (CVSS 6.8) affecting cs-c2shw firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Rostelecom CS-C2SHW 5.0.082.1 is affected by: Bash command injection. The camera reads configuration from QR code (including network settings). The static IP configuration from QR code is copied to the file /config/ip-static and after reboot data from this file is inserted into bash command (without any escaping). So bash injection is possible. Camera doesn't parse QR codes if it's already successfully configured. Camera is always rebooted after

Why this priority

Public exploit reference

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

Risk facts

CVSS score	6.8 (Medium)
Attack vector	Physical
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.2% (top 32%)
CISA exploited list	No
Weakness	CWE-78
Published	2021-01-26
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: company

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

Am I affected?

Timeline

2021-01-26 18:15 UTCPublished CVE record published
2026-06-17 03:09 UTCUpdated Record last modified

company cs-c2shw firmware MITIGATE

Affected: 5.0.082.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.0.082.1

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-2020-27542?

cs-c2shw firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2020-27542 being exploited?

CVE-2020-27542 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-2020-27542 affect?

CVE-2020-27542 affects cs-c2shw firmware. Severity is medium (CVSS 6.8). Rostelecom CS-C2SHW 5.0.082.1 is affected by: Bash command injection. The camera reads configuration from QR code (including network settings). The static IP configuration from QR code is copied to the file /config/ip-static and after reboo

How urgent is CVE-2020-27542?

Priority 46/100. Public exploit reference

Related CVEs

CVE-2020-27541 HIGH 7.5 MITIGATE Denial of Service vulnerability in Rostelecom CS-C2SHW 5.0.082.1
CVE-2020-27540 CRITICAL 9.8 MITIGATE Bash injection vulnerability and bypass of signature verification in Rostelecom CS-C2SHW 5.0.082.1
CVE-2020-27539 CRITICAL 9.8 MITIGATE Heap overflow with full parsing of HTTP respose in Rostelecom CS-C2SHW 5.0.082.1

References

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