How severe is CVE-2021-27703?

CVE-2021-27703 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-27703 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2021-27703?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2021-27703 have an EU (EUVD) identifier?

Yes. CVE-2021-27703 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2021-14445.

When was CVE-2021-27703 published?

CVE-2021-27703 was published on 2024-11-12 and last updated on 2026-06-17.

CVE-2021-27703

CVE-2021-27703 is a medium-severity vulnerability with a CVSS 3.x base score of 5.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
EPSS exploit prediction: 0% (16th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2021-14445
Weakness: CWE-79
Published: 2024-11-12
Last modified: 2026-06-17

Description

Sercomm Model Etisalat Model S3- AC2100 is affected by Cross Site Scripting (XSS) via the firmware update page.

Frequently asked questions

What is CVE-2021-27703?: Sercomm Model Etisalat Model S3- AC2100 is affected by Cross Site Scripting (XSS) via the firmware update page.
How severe is CVE-2021-27703?: CVE-2021-27703 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-27703 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2021-27703?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2021-27703 have an EU (EUVD) identifier?: Yes. CVE-2021-27703 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2021-14445.
When was CVE-2021-27703 published?: CVE-2021-27703 was published on 2024-11-12 and last updated on 2026-06-17.

References

https://github.com/Mrnmap/mrnmap-cve/blob/main/CVE-2021-27703

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