How severe is CVE-2020-35573?

CVE-2020-35573 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2020-35573 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-35573?

CVE-2020-35573 primarily affects Postsrsd Project Postsrsd. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-35573?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2020-35573 published?

CVE-2020-35573 was published on 2020-12-20 and last updated on 2026-06-17.

CVE-2020-35573

CVE-2020-35573 is a high-severity vulnerability in Postsrsd Project Postsrsd with a CVSS 3.x base score of 7.5. 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-834.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 3% (84th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-834
Affected product: Postsrsd Project Postsrsd
Published: 2020-12-20
Last modified: 2026-06-17

Description

srs2.c in PostSRSd before 1.10 allows remote attackers to cause a denial of service (CPU consumption) via a long timestamp tag in an SRS address.

Frequently asked questions

What is CVE-2020-35573?: srs2.c in PostSRSd before 1.10 allows remote attackers to cause a denial of service (CPU consumption) via a long timestamp tag in an SRS address.
How severe is CVE-2020-35573?: CVE-2020-35573 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2020-35573 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-35573?: CVE-2020-35573 primarily affects Postsrsd Project Postsrsd. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-35573?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-35573 published?: CVE-2020-35573 was published on 2020-12-20 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:postsrsd_project:postsrsd:*:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

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