How severe is CVE-2021-33753?

CVE-2021-33753 has a CVSS 3.x base score of 4.7, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2021-33753 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-33753?

CVE-2021-33753 affects Microsoft Bing. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-33753?

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

When was CVE-2021-33753 published?

CVE-2021-33753 was published on 2021-07-14 and last updated on 2026-06-17.

CVE-2021-33753

CVE-2021-33753 is a medium-severity vulnerability in Microsoft Bing with a CVSS 3.x base score of 4.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 3.x base score 4.7)
CVSS v2: 4.3
EPSS exploit prediction: 1% (71st percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Microsoft Bing
Published: 2021-07-14
Last modified: 2026-06-17

Description

Microsoft Bing Search Spoofing Vulnerability

Frequently asked questions

What is CVE-2021-33753?: Microsoft Bing Search Spoofing Vulnerability
How severe is CVE-2021-33753?: CVE-2021-33753 has a CVSS 3.x base score of 4.7, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2021-33753 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-33753?: CVE-2021-33753 affects Microsoft Bing. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-33753?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-33753 published?: CVE-2021-33753 was published on 2021-07-14 and last updated on 2026-06-17.

References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-33753

Affected products (1)

cpe:2.3:a:microsoft:bing:-:*:*:*:*:android:*:*

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