Is CVE-2021-26712 in the CISA KEV catalog?

No. CVE-2021-26712 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-26712?

CVE-2021-26712 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2021-26712?

CVE-2021-26712 has an EPSS score of 3.59% (88th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-26712?

Upgrade asterisk to 18.2.1 or later.

CVE & CISA-KEV Catalog

CVE-2021-26712

HIGHEPSS 88th pctl

7.5

CVSS v3

NVD

Description

Incorrect access controls in res_srtp.c in Sangoma Asterisk 13.38.1, 16.16.0, 17.9.1, and 18.2.0 and Certified Asterisk 16.8-cert5 allow a remote unauthenticated attacker to prematurely terminate secure calls by replaying SRTP packets.

How to fix

Remediation Available

asteriskNVD

Affected:>= 18.0, < 18.2.1Fixed in:18.2.1CVE-2021-26712derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploit Intelligence

3.59%probability of exploitation in 30 days

88thpercentile

Elevated risk: more likely to be exploited than 88% of all known CVEs.

References

Patch1

issues.asterisk.org

Vendor Advisory2

Third-Party Advisory2

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Markdown

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.