How severe is CVE-2017-15994?

CVE-2017-15994 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2017-15994 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-15994?

CVE-2017-15994 affects Samba Rsync. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-15994?

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

When was CVE-2017-15994 published?

CVE-2017-15994 was published on 2017-10-29 and last updated on 2026-06-17.

CVE-2017-15994

CVE-2017-15994 is a critical-severity vulnerability in Samba Rsync with a CVSS 3.x base score of 9.8. 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-354.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 1% (62nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-354
Affected product: Samba Rsync
Published: 2017-10-29
Last modified: 2026-06-17

Description

rsync 3.1.3-development before 2017-10-24 mishandles archaic checksums, which makes it easier for remote attackers to bypass intended access restrictions. NOTE: the rsync development branch has significant use beyond the rsync developers, e.g., the code has been copied for use in various GitHub projects.

Frequently asked questions

What is CVE-2017-15994?: rsync 3.1.3-development before 2017-10-24 mishandles archaic checksums, which makes it easier for remote attackers to bypass intended access restrictions. NOTE: the rsync development branch has significant use beyond the rsync developers, e.g., the code has been copied for use in various GitHub projects.
How severe is CVE-2017-15994?: CVE-2017-15994 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2017-15994 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-15994?: CVE-2017-15994 affects Samba Rsync. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-15994?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2017-15994 published?: CVE-2017-15994 was published on 2017-10-29 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:samba:rsync:*:*:*:*:*:*:*:*

More vulnerabilities in Samba Rsync

CVE-2024-12084 — Critical (CVSS 9.8): A heap-based buffer overflow flaw was found in the rsync daemon. This issue is due to improper handling of…
CVE-2017-17434 — Critical (CVSS 9.8): The daemon in rsync 3.1.2, and 3.1.3-development before 2017-12-03, does not check for fnamecmp filenames in the…
CVE-2017-16548 — Critical (CVSS 9.8): The receive_xattr function in xattrs.c in rsync 3.1.2 and 3.1.3-development does not check for a trailing '\0'…
CVE-2026-53791 — Critical (CVSS 9.1): rsync daemon before 3.5.0 contains an IP address spoofing vulnerability that allows unauthenticated remote attackers…
CVE-2026-70461 — High (CVSS 8.2): rsync 3.2.5 before 3.5.0 contains a heap out-of-bounds write vulnerability that allows remote unauthenticated…
CVE-2026-70463 — High (CVSS 8.1): rsync 3.1.0 before 3.5.0 contains an authorization bypass in auth users directive parsing. The auth users parser uses…

All CVEs affecting Samba Rsync →

Other CWE-354 vulnerabilities

CVE-2025-11543 — Critical (CVSS 9.8): Improper Validation of Integrity Check Value vulnerability in Sharp Display Solutions projectors allows a attacker may…
CVE-2024-25678 — Critical (CVSS 9.8): In LiteSpeed QUIC (LSQUIC) Library before 4.0.4, DCID validation is mishandled.
CVE-2023-33668 — Critical (CVSS 9.8): DigiExam up to v14.0.2 lacks integrity checks for native modules, allowing attackers to access PII and takeover…
CVE-2026-75803 — Critical (CVSS 9.1): Issue summary: ChaCha20-Poly1305 and AES-OCB decryption with an empty ciphertext can report success without verifying…
CVE-2026-49230 — Critical (CVSS 9.1): Improper Validation of Integrity Check Value vulnerability in Apache APISIX. The jwe-decrypt plugin under default…
CVE-2026-34182 — Critical (CVSS 9.1): Issue Summary: Cryptographic Message Services (CMS) processing fails to perform sufficient input validation on the…

Browse all CWE-354 vulnerabilities →