How severe is CVE-2009-2070?

CVE-2009-2070 has a CVSS 2.0 base score of 6.8, rated medium severity.

Is CVE-2009-2070 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-2070?

CVE-2009-2070 affects Opera Opera Browser. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2009-2070?

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

When was CVE-2009-2070 published?

CVE-2009-2070 was published on 2009-06-15 and last updated on 2026-06-16.

CVE-2009-2070

CVE-2009-2070 is a medium-severity vulnerability in Opera Opera Browser with a CVSS 2.0 base score of 6.8. 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-287.

Key facts

Severity: Medium (CVSS 2.0 base score 6.8)
EPSS exploit prediction: 1% (53rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Opera Opera Browser
Published: 2009-06-15
Last modified: 2026-06-16

Description

Opera displays a cached certificate for a (1) 4xx or (2) 5xx CONNECT response page returned by a proxy server, which allows man-in-the-middle attackers to spoof an arbitrary https site by letting a browser obtain a valid certificate from this site during one request, and then sending the browser a crafted 502 response page upon a subsequent request.

Frequently asked questions

What is CVE-2009-2070?: Opera displays a cached certificate for a (1) 4xx or (2) 5xx CONNECT response page returned by a proxy server, which allows man-in-the-middle attackers to spoof an arbitrary https site by letting a browser obtain a valid certificate from this site during one request, and then sending the browser a crafted 502 response page upon a subsequent request.
How severe is CVE-2009-2070?: CVE-2009-2070 has a CVSS 2.0 base score of 6.8, rated medium severity.
Is CVE-2009-2070 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-2070?: CVE-2009-2070 affects Opera Opera Browser. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2009-2070?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2009-2070 published?: CVE-2009-2070 was published on 2009-06-15 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:opera:opera_browser:-:*:*:*:*:*:*:*

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